CN108355190B - Peritoneal dialysis trocar - Google Patents
Peritoneal dialysis trocar Download PDFInfo
- Publication number
- CN108355190B CN108355190B CN201810125927.6A CN201810125927A CN108355190B CN 108355190 B CN108355190 B CN 108355190B CN 201810125927 A CN201810125927 A CN 201810125927A CN 108355190 B CN108355190 B CN 108355190B
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- Prior art keywords
- tube
- infusion
- sleeve
- side wall
- cutting
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- 238000000502 dialysis Methods 0.000 title claims 11
- 238000001802 infusion Methods 0.000 claims 32
- 238000000034 method Methods 0.000 claims 7
- 238000001514 detection method Methods 0.000 claims 6
- 230000007306 turnover Effects 0.000 claims 5
- 210000003205 muscle Anatomy 0.000 claims 3
- 238000007789 sealing Methods 0.000 claims 3
- 239000007788 liquid Substances 0.000 claims 2
- 239000000463 material Substances 0.000 claims 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims 1
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 210000002784 stomach Anatomy 0.000 claims 1
- 229910052719 titanium Inorganic materials 0.000 claims 1
- 239000010936 titanium Substances 0.000 claims 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
- A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
- A61M1/28—Peritoneal dialysis ; Other peritoneal treatment, e.g. oxygenation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/34—Trocars; Puncturing needles
- A61B17/3415—Trocars; Puncturing needles for introducing tubes or catheters, e.g. gastrostomy tubes, drain catheters
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods
- A61B17/34—Trocars; Puncturing needles
- A61B17/3417—Details of tips or shafts, e.g. grooves, expandable, bendable; Multiple coaxial sliding cannulas, e.g. for dilating
- A61B17/3421—Cannulas
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2210/00—Anatomical parts of the body
- A61M2210/10—Trunk
- A61M2210/1021—Abdominal cavity
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Veterinary Medicine (AREA)
- Public Health (AREA)
- Emergency Medicine (AREA)
- Urology & Nephrology (AREA)
- Pathology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Vascular Medicine (AREA)
- Hematology (AREA)
- Gastroenterology & Hepatology (AREA)
- Anesthesiology (AREA)
- External Artificial Organs (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses a peritoneal dialysis trocar, which is characterized by comprising a sleeve and a needle core, wherein the sleeve comprises two sleeve half pipes, a clamp is sleeved on the outer side wall of the sleeve, and a fixing device for fixing the clamp is arranged on the sleeve; the needle core is including cutting end and operating end, and the conical structure setting is become to the cutting end, and the lateral wall epirelief of cutting end is equipped with at least one cutting edge, and the length direction of cutting edge becomes helix structure setting along the lateral wall of cutting end, and the blade of cutting edge is the slope setting towards the path end of cutting end, is provided with infusion passageway on the needle core, is provided with a plurality of infusion holes that switch on with infusion passageway on the cutting end, and the other end sealing connection of transfer line has the negative pressure detection device who is used for pouring into the detection liquid into infusion passageway in, and negative pressure detection device can follow infusion hole with the detection liquid in the infusion passageway and flow. The peritoneal dialysis trocar is simple and convenient to operate, small in incision and not prone to damaging viscera.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to a peritoneal dialysis trocar.
Background
Peritoneal dialysis is one of the methods for treating acute and chronic renal failure with definite curative effects, and for a long time, the peritoneal dialysis adopts a tube placement method in a surgical mode, the abdominal wall is cut at a position of 3cm below the umbilicus until reaching the peritoneum, and a peritoneal dialysis tube is placed into a bladder rectum crypt by using ring forceps. The peritoneal dialysis by the method has the following defects that firstly, the operation mode is complex, the operation is generally carried out by a urinary surgeon, secondly, the operation time is long, the incision is long, the operation usually needs to be carried out for one hour, more than 5cm of incisions exist (especially for fat patients), the wound is large, the wound healing is slow, the complications (such as bleeding, infection, accidental injury to organs, abdominal wall fistula, intestinal adhesion and the like) are numerous, and particularly, the bleeding, bleeding and hemostasis difficulties are caused for patients with acute and serious severe cases of coagulation dysfunction (such as acute and chronic renal failure uremia).
Meanwhile, after the peritoneal dialysis tube is blocked (the protein content in HFRS peritoneal permeate liquid is high, the HFRS peritoneal dialysis tube is easy to block, if bleeding occurs, the HFRS peritoneal permeate liquid is easier to block), the flushing is not easy, the tube must be replaced, if the tube is replaced from the original incision, the abdominal cavity is required to be opened again, so that the injured tissue aggravates the injury, the sealing around the permeable tube is poor, the dialysis liquid is possible from the tube Zhou Waishen, the dialysis effect is affected, the secondary infection is easy to occur, if the tube is replaced, the tissue injury and pain of a patient are increased, and the dialysis liquid can be extravasated from the original incision.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a peritoneal dialysis trocar which is simple to operate, small in incision and not easy to damage organs.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a peritoneal dialysis trocar, includes the sleeve pipe and peg graft the nook closing member in the sleeve pipe, the sleeve pipe is including two cover half pipes that set up symmetrically, the cross section of cover half pipe along its length direction sets up into semicircle annular structure, and the open end of two cover half pipes offsets the joint and encloses and form the sleeve pipe, cup jointed the clamp on the lateral wall of sleeve pipe, be provided with the fixing device who is used for fixed clamp on the sleeve pipe; the needle core comprises a cutting end positioned at the head end and used for cutting a notch and an operating end positioned at the tail end and used for operating the needle core, wherein the cutting end penetrates through the sleeve and then extends out of the end part of the sleeve in the process of inserting the needle core into the sleeve, and the operating end also extends out of the tail end of the sleeve; the cutting end is arranged in a conical structure, the small-diameter end of the cutting end is positioned at the top end of the needle core, at least one cutting edge is convexly arranged on the outer side wall of the cutting end, the length direction of the cutting edge is arranged in a spiral line structure along the outer side wall of the cutting end, each cutting edge is only provided with one circle, the head end to the tail end of the cutting edge wind the outer side wall of the cutting end in a circle, the pitch size of the cutting edge in the spiral line structure is equal to the length size of the cutting end, the cutting edge of the cutting edge is obliquely arranged towards the small-diameter end of the cutting end, the cutting edge comprises oblique guide surfaces positioned at two sides of the cutting edge, and when the cutting edge of the cutting edge cuts a notch on muscle tissue, the oblique guide surfaces guide the muscle tissue at two sides of the notch to two sides; the infusion needle is characterized in that an infusion channel for infusion is coaxially arranged on the needle core, one end of the infusion channel penetrates through the operation end and is connected with an infusion tube in a sealing mode, the other end of the infusion channel is communicated with the cutting end to form a blind hole structure, a plurality of infusion holes communicated with the infusion channel are formed in the cutting end, one end of each infusion hole is communicated with the infusion channel, and the other end of each infusion hole penetrates through the outer side wall of the cutting end; the other end of the infusion tube is connected with a negative pressure detection device for injecting detection liquid into the infusion channel in a sealing manner, and the negative pressure detection device can flow out the detection liquid in the infusion channel from the infusion hole.
The invention is further provided with: the infusion tube comprises an infusion tube I communicated with the infusion channel and an infusion tube II connected with the negative pressure detection device, wherein a first inner tube and a first outer tube which are coaxial are arranged at the joint of the infusion tube I and the infusion tube II, and the end face of the first inner tube is positioned in the first outer tube; the interface of the two infusion tubes for connecting the first infusion tube is provided with a second inner tube and a second outer tube which are coaxial, the end face of the second inner tube is positioned in the second outer tube, a first gap for inserting the second outer tube is reserved between the first inner tube and the first outer tube, and a second gap for inserting the first inner tube is reserved between the second inner tube and the second outer tube; the second inner pipe is arranged in a conical structure, the small diameter end of the second inner pipe faces the first inner pipe, the outer diameter size of the small diameter end of the second inner pipe is smaller than the inner diameter size of the first inner pipe, and the outer diameter size of the large diameter end of the second inner pipe is larger than the inner diameter size of the first inner pipe; the first outer tube is used for being connected the link inside wall epirelief of second outer tube and is equipped with first lock joint ring, the second outer tube is used for being connected the link lateral wall epirelief of first outer tube and is equipped with the second lock joint ring, and the second outer tube insert behind the in-process first lock joint ring of first clearance with second lock joint ring lock joint to the toper lateral wall of second inner tube can keep the butt sealed with the open end of first inner tube when first lock joint ring and second lock joint ring lock joint.
The invention is further provided with: the infusion tube comprises a first infusion tube, a second infusion tube, a first inner tube, a second inner tube, a first outer tube and a second outer tube, wherein the joint of the first infusion tube and the second infusion tube is positioned in the middle of the infusion tube, the first inner tube is made of medical elastic plastic, the second inner tube is made of medical hard materials, the first outer tube and the second outer tube are made of medical hard materials, an elastic crack for shrinking or expanding the tube wall is formed in the side wall of the first outer tube and/or the side wall of the second outer tube, and the elastic crack penetrates through the tube wall.
The invention is further provided with: the fixing device comprises a turnover buckling arm with one end hinged to the outer side wall of the sleeve half pipe and a torsion spring for driving the other end of the turnover buckling arm to be attached to the outer side wall of the sleeve half pipe, wherein one end, far away from the hinged end, of the turnover buckling arm is provided with a buckling block for buckling on the outer side wall of the end part of the clamp, and when the turnover buckling arm turns outwards around the hinged part until the length direction of the turnover buckling arm is perpendicular to the length direction of the sleeve, the distance between the inner side wall of the buckling block and the outer side wall of the sleeve is matched with the thickness dimension of the pipe wall of the clamp; the overturning buckling arm is buckled with the clamp sleeved on the sleeve under the acting force of the torsion spring in the process of outwards overturning the hinging part, and the inner side wall of the buckling block is always abutted with the outer side wall of the clamp.
The invention is further provided with: the clamping block is provided with a positioning groove on the inner side wall close to one side of the overturning and buckling arm, the outer side wall of the clamping hoop is convexly provided with a positioning convex ring which can be buckled by the positioning groove, and the width dimension of the positioning convex ring is matched with the width dimension of the positioning groove; the positioning convex ring can be embedded into the positioning groove in the process of buckling the overturning buckling arm and the clamping hoop under the acting force of the torsion spring.
The invention is further provided with: the external side wall of the sleeve half pipe is provided with an embedding groove for embedding the overturning buckling arm, the depth dimension of the embedding groove is matched with the thickness dimension of the overturning buckling arm, and the overturning buckling arm is embedded into the embedding groove under the acting force of the torsion spring in the overturning process of the overturning buckling arm around the hinging position to the external side wall of the sleeve half pipe.
The invention is further provided with: the end part of the sleeve facing the cutting end is provided with a positioning tube for being inserted into muscle tissues, the positioning tube comprises two symmetrically arranged positioning half tubes, the positioning half tubes are positioned at the end part of the sleeve half tube facing the cutting end, the cross sections of the positioning half tubes along the length direction of the positioning half tubes are arranged in a semicircular structure, the opening ends of the two sleeve half tubes are also abutted against each other in the abutting process of the opening ends of the two sleeve half tubes to form the positioning tube, the cutting end penetrates through the sleeve in the process of inserting the needle core into the sleeve and then extends out of the end part of the positioning tube, and the operation end also extends out of the tail end of the sleeve; the external diameter size of the positioning tube is gradually increased from the end part of the positioning tube to the joint of the positioning tube and the sleeve, and the end surface of the positioning tube is in an inclined surface structure.
The invention is further provided with: the outer side walls of the positioning tube and the end part of the needle core are respectively provided with a titanium coating with good biocompatibility.
The invention is further provided with: the negative pressure detection device comprises an injector communicated with the infusion tube and a pressure measuring tube for detecting the pressure in the infusion tube.
The invention is further provided with: and limiting strips are arranged on the end faces of the two sides of the opening end of the sleeve half pipe in a protruding mode, the width size of each limiting strip is half of the thickness size of the pipe wall of the sleeve half pipe, one limiting strip is located on the inner side of one side end face, and the other limiting strip is located on the outer side of the other side end face.
In summary, the invention has the following beneficial effects: the trocar directly pierces the abdomen, the cutting end can rotate along with the rotating operation end until the needle core pierces the abdominal cavity, the detection liquid in the infusion channel can flow into the abdominal cavity due to the negative pressure effect in the abdominal cavity, and the condition can be observed from the infusion tube or the negative pressure detection device, so that the needle core is indicated to pierce in place, the trocar is prevented from damaging organs of the abdominal cavity, the needle core is extracted from the cannula, the dialysis catheter is sent into the abdominal cavity through the cannula, the clamp is taken down after the position is reached, the two half-sleeves are conveniently separated from the dialysis catheter, the clamp is moved out from the other end of the dialysis catheter, and the dialysis catheter is finally fixed. The trocar has the advantages of simple operation, rapidness, convenience, safety, reliability and small incision, reduces the pain of the hands of the patient, can avoid damaging the abdominal viscera of the patient, can reduce and avoid the occurrence of complications, and has the advantages of rapid wound healing and small wound after tube drawing. Is especially suitable for patients with acute critical diseases such as acute and chronic renal failure and uremia with coagulation dysfunction.
Drawings
FIG. 1 is an exploded view of a peritoneal dialysis trocar;
FIG. 2 is a schematic perspective view of a cutting end;
FIG. 3 is a schematic diagram of a negative pressure detecting device;
FIG. 4 is a schematic view of the structure of the joint between the first infusion tube and the second infusion tube;
FIG. 5 is a schematic structural view of a second outer tube;
FIG. 6 is a cross-sectional view of the fixture;
Fig. 7 is a cross-sectional view of the sleeve in the length direction.
Reference numerals: 1. a sleeve; 11. sleeving a half pipe; 111. a scarf joint groove; 112. a limit bar; 12. a fixing device; 121. turning over the buckling arm; 122. a buckling block; 123. a positioning groove; 13. a positioning tube; 131. positioning a half pipe; 2. a needle core; 21. cutting the end; 211. a cutting edge; 2111. a sloped guide surface; 212. an infusion hole; 22. an operation end; 23. an infusion channel; 3. a clamp; 31. positioning the convex ring; 4. an infusion tube; 41. a first tube for transfusion; 411. a first inner tube; 412. a first outer tube; 4121. a first fastening ring; 413. a first gap; 42. a second infusion tube; 421. a second inner tube; 422. a second outer tube; 4221. a second fastening ring; 423. a second gap; 43. an elastic slit; 5. a negative pressure detection device; 51. a syringe; 52. and (5) measuring the pressure of the pipe.
Detailed Description
The invention will now be described in further detail with reference to the drawings and examples. Wherein like parts are designated by like reference numerals. It should be noted that the words "front", "back", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "bottom" and "top", "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
Referring to fig. 1-7, a peritoneal dialysis trocar comprises a cannula 1 and a needle core 2 inserted in the cannula 1, wherein the cannula 1 comprises two symmetrically arranged sleeve half pipes 11, the cross sections of the sleeve half pipes 11 along the length direction of the sleeve half pipes are arranged in a semicircular structure, the open ends of the two sleeve half pipes 11 are abutted and jointed to form the cannula 1, a clamp 3 is sleeved on the outer side wall of the cannula 1, and a fixing device 12 for fixing the clamp 3 is arranged on the cannula 1; the clamp 3 is used for sleeving two sleeve half pipes 11, so that the two sleeve half pipes 11 can be buckled into the sleeve 1, and the fixing device 12 is used for fixing the clamp 3 on the sleeve 1, so that the influence on the use of the trocar caused by the movement of the clamp 3 and even the falling of the clamp 1 during the use is avoided.
The needle core 2 comprises a cutting end 21 positioned at the head end and used for cutting a notch, and an operating end 22 positioned at the tail end and used for operating the needle core 2, wherein the cutting end 21 penetrates through the sleeve 1 and extends out of the end part of the sleeve 1 when the needle core 2 is inserted into the sleeve 1, and the operating end 22 also extends out of the tail end of the sleeve 1; the cutting end 21 is used for directly puncturing the abdomen, the length of the whole needle core 2 is longer than that of the sleeve 1, two ends of the whole needle core can extend out of two ends of the sleeve 1, friction lines can be arranged on the outer side wall of the operating end 22 and used for enhancing the friction force of a doctor when the doctor touches the operating end 22, and the use stability of the trocar is improved.
The cutting end 21 is arranged in a conical structure, the small diameter end of the cutting end 21 is positioned at the top end of the needle core 2, at least one cutting edge 211 is convexly arranged on the outer side wall of the cutting end 21, the length direction of the cutting edge 211 is arranged in a spiral line structure along the outer side wall of the cutting end 21, each cutting edge 211 is only provided with one circle, the head end to the tail end of the cutting edge 211 wind the outer side wall of the cutting end 21 in a circle, the pitch size of the cutting edge 211 in the spiral line structure is equal to the length size of the cutting end 21, the cutting edge of the cutting edge 211 is obliquely arranged towards the small diameter end of the cutting end 21, the cutting edge 211 comprises oblique guide surfaces 2111 positioned at two sides of the cutting edge, and when the cutting edge of the cutting edge 211 cuts a cut on muscle tissue, the oblique guide surfaces 2111 guide the muscle tissue at two sides of the cut to two sides; the cutting end 21 can rotate through the rotating operation end 22 when the abdomen is punctured, so that the cutting end 21 is driven to rotate, the puncture depth of the needle core 2 is controllable, the trocar is controllable to puncture, and meanwhile, the abdominal organs can be prevented from being injured.
The needle core 2 is coaxially provided with an infusion channel 23 for infusion, one end of the infusion channel 23 penetrates through the operation end 22 and is connected with the infusion tube 4 in a sealing way, the other end of the infusion channel is communicated with the cutting end 21 to form a blind hole structure, the cutting end 21 is provided with a plurality of infusion holes 212 communicated with the infusion channel 23, one end of each infusion hole 212 is communicated with the infusion channel 23, and the other end of each infusion hole penetrates through the outer side wall of the cutting end 21; the other end of the infusion tube 4 is connected with a negative pressure detection device 5 for injecting detection liquid into the infusion channel 23 in a sealing manner, and the negative pressure detection device 5 can flow out the detection liquid in the infusion channel 23 from the infusion hole 212. The negative pressure detecting device 5 can fill the infusion channel 23 with the detection liquid such as normal saline or dialysis liquid through the infusion tube 4 and has a certain pressure, when the cutting end 21 pierces into the abdomen, the detection liquid can be injected into the abdomen, and the situation can be observed from the infusion tube 4 or the negative pressure detecting device 5, so that the needle core 2 is pierced in place, and the trocar can be prevented from damaging the viscera of the abdominal cavity.
When the device is used, the two sleeve half pipes 11 are buckled on the outer side wall of the needle core 2, the clamp 3 is fixed on the sleeve 1 through the fixing device 12, the negative pressure detection device 5 injects detection liquid into the infusion channel 23 through the infusion pipe 4, then the infusion channel is directly punctured on the abdomen, the rotary operation end 22 enables the cutting end 21 to rotate along with the infusion channel until the needle core 2 punctures into the abdominal cavity, due to the negative pressure effect in the abdominal cavity, the detection liquid in the infusion channel 23 can flow into the abdominal cavity, and the situation can be observed from the infusion pipe 4 or the negative pressure detection device 5, so that the needle core 2 punctures in place, thereby avoiding the damage of a trocar to an visceral organ of the abdominal cavity, then the needle core 2 is extracted from the sleeve 1, a dialysis catheter is sent into the abdominal cavity through the sleeve 1, the clamp 3 is taken down after the dialysis catheter reaches the position, the two sleeve half pipes 11 are conveniently separated from the dialysis catheter, the clamp 3 is removed from the other end of the dialysis catheter, and finally the dialysis catheter is fixed.
The trocar has the advantages of simple operation, rapidness, convenience, safety, reliability and small incision, reduces the pain of the hands of the patient, can avoid damaging the abdominal viscera of the patient, can reduce and avoid the occurrence of complications, and has the advantages of rapid wound healing and small wound after tube drawing. Is especially suitable for patients with acute critical diseases such as acute and chronic renal failure and uremia with coagulation dysfunction.
The infusion tube 4 comprises an infusion tube 41 communicated with the infusion channel 23 and an infusion tube 42 connected with the negative pressure detection device 5, a first inner tube 411 and a first outer tube 412 which are coaxial are arranged at the joint of the infusion tube 41 and the infusion tube 42, and the end face of the first inner tube 411 is positioned in the first outer tube 412; the joint of the two infusion tubes 42 for connecting the first infusion tube 41 is provided with a second inner tube 421 and a second outer tube 422 which are coaxial, the end face of the second inner tube 421 is positioned in the second outer tube 422, a first gap 413 for inserting the second outer tube 422 is reserved between the first inner tube 411 and the first outer tube 412, and a second gap 423 for inserting the first inner tube 411 is reserved between the second inner tube 421 and the second outer tube 422; since the end face of the first inner tube 411 is located in the first outer tube 412 and the end face of the second inner tube 421 is located in the second outer tube 422, the first inner tube 411 and the second inner tube 421 can be completely wrapped by adding the first outer tube 412 and the second outer tube 422 respectively, when the first infusion tube 41 and the second infusion tube 42 are connected, the connection between the first inner tube 411 and the second inner tube 421 can be controlled by directly contacting the first outer tube 412 and the second outer tube 422, so that the connection operation is convenient, the interface of the first infusion tube 41 and the second infusion tube 42 is effectively prevented from being touched by mistake, and the infection or peritonitis caused by the virus or foreign matters entering the abdominal cavity due to the contact interface is prevented, and the use safety performance of the infusion tube 4 can be greatly enhanced. And the interface of the first infusion tube 41 and the second infusion tube 42 is provided with a multi-layer structure, so that the structure strength of the interface is high, bending is not easy to occur, and smooth circulation of detection liquid is facilitated.
The end of the second inner tube 421 is arranged in a conical structure, the small diameter end of the second inner tube 421 faces the first inner tube 411, the outer diameter of the small diameter end of the second inner tube 421 is smaller than the inner diameter of the first inner tube 411, and the outer diameter of the large diameter end of the second inner tube 421 is larger than the inner diameter of the first inner tube 411; the outer side wall of the second inner tube 421 is abutted with the end part of the first inner tube 411 to achieve interference sealing, and the structure enables the infusion first tube 41 and the infusion second tube 42 to achieve quick sealing connection, so that sealing efficiency and sealing effect are improved.
The first outer tube 412 is configured to be connected to the connecting end inner side wall of the second outer tube 422, a first fastening ring 4121 is protruding on the connecting end inner side wall, the second outer tube 422 is configured to be connected to the connecting end outer side wall of the first outer tube 412, a second fastening ring 4221 is protruding on the connecting end outer side wall, the first fastening ring 4121 slides over the second fastening ring 4221 and is fastened to the second fastening ring 4221 during the process of inserting the second outer tube 422 into the first gap 413, and the tapered outer side wall of the second inner tube 421 can be kept in abutting sealing with the opening end of the first inner tube 411 when the first fastening ring 4121 is fastened to the second fastening ring 4221. When the first infusion tube 41 and the second infusion tube 42 are connected, the first fastening ring 4121 is fastened with the second fastening ring 4221, meanwhile, the conical outer side wall of the second inner tube 421 is kept in abutting sealing with the opening end of the first inner tube 411, the structure is simple and convenient to assemble and disassemble, even if the first infusion tube 41 rotates along with the rotation of the needle core 2, the first fastening ring 4121 can rotate in the fastening state with the second fastening ring 4221, meanwhile, the conical outer side wall of the second inner tube 421 can also keep in the abutting sealing state with the opening end of the first inner tube 411, and therefore the joint of the first infusion tube 41 and the second infusion tube 42 can keep a sealing effect all the time in the rotating process, and the sealing stability of the joint of the infusion tube 4 is improved.
The joint of the first infusion tube 41 and the second infusion tube 42 is positioned in the middle of the infusion tube 4, so that the error that the joint is easy to separate due to the fact that the joint is touched by mistake when the needle core 2 is operated is avoided; the first inner tube 411 is made of medical elastic plastic such as soft PVC; the second inner tube 421 is made of a medical hard material, and both the first outer tube 412 and the second outer tube 422 are made of a medical hard material, such as hard PVC; the side walls of the first outer tube 412 and/or the second outer tube 422 are provided with elastic slits 43 for contraction or expansion of the tube wall, and the elastic slits 43 are provided through the tube wall. When the first fastening ring 4121 is fastened to the second fastening ring 4221, the pipe diameter of the first outer pipe 412 and/or the second outer pipe 422 may be increased or shrunk, and the first outer pipe 412 and the second outer pipe 422 may be deformed due to the elastic slit 43, so that the fastening of the first fastening ring 4121 to the second fastening ring 4221 is facilitated.
The fixing device 12 comprises a turnover buckling arm 121 with one end hinged to the outer side wall of the sleeve half pipe 11 and a torsion spring for driving the other end of the turnover buckling arm 121 to be attached to the outer side wall of the sleeve half pipe 11, one end, far away from the hinged end, of the turnover buckling arm 121 is provided with a buckling block 122 for buckling on the outer side wall of the end part of the clamp 3, and when the turnover buckling arm 121 is outwards turned around the hinged part until the length direction of the turnover buckling arm 121 is perpendicular to the length direction of the sleeve 1, the distance from the inner side wall of the buckling block 122 to the outer side wall of the sleeve 1 is matched with the thickness size of the pipe wall of the clamp 3; the overturning buckling arm 121 is buckled with the clamp 3 sleeved on the sleeve 1 under the acting force of the torsion spring in the process of outwards overturning the hinging part, and the inner side wall of the buckling block 122 is always in abutting connection with the outer side wall of the clamp 3. After the clamp 3 is sleeved on the sleeve 1, the overturning buckling arm 121 is outwards overturned and then buckled at the end part of the clamp 3, and the buckling block 122 is abutted to the outer side wall of the clamp 3 at the moment, so that the clamp 3 is fixed on the sleeve 1 through the overturning buckling arm 121, and shaking of the clamp 3 on the sleeve 1 can be effectively avoided, and the fixing firmness of the fixing device 12 is improved.
The inner side wall of the buckling block 122, which is close to one side of the overturning buckling arm 121, is provided with a positioning groove 123, the outer side wall of the clamp 3 is convexly provided with a positioning convex ring 31 which can be buckled by the positioning groove 123, and the width dimension of the positioning convex ring 31 is matched with the width dimension of the positioning groove 123; the positioning convex ring 31 can be embedded into the positioning groove 123 in the process that the turnover buckling arm 121 is buckled with the clamp 3 under the action force of the torsion spring. The fastening block 122 is fastened on the outer sidewall of the clamp 3, and the positioning convex ring 31 is embedded in the positioning groove 123, which is favorable for improving the fastening stability of the fastening block 122, and further is favorable for improving the fixing firmness of the fixing device 12. The positioning convex ring 31 can facilitate the overturning and buckling arm 121 to buckle on any unexpected side wall of the clamp 3, which is beneficial to simplifying the buckling operation of the overturning and buckling arm 121.
The outer side wall of the sleeve half pipe 11 is provided with an embedding groove 111 for embedding the overturning buckling arm 121, the depth dimension of the embedding groove 111 is matched with the thickness dimension of the overturning buckling arm 121, and the overturning buckling arm 121 is embedded into the embedding groove 111 under the acting force of the torsion spring in the overturning process of the overturning buckling arm 121 around the hinging position to the outer side wall of the sleeve half pipe 11. The overturning buckling arms 121 are embedded in the embedding grooves 111, so that the clamp 3 can conveniently slide over the sleeve 1, and the two sleeve half pipes 11 can conveniently be separated from the dialysis catheter.
The end part of the sleeve 1 facing the cutting end 21 is provided with a positioning tube 13 for being inserted into muscle tissue, the positioning tube 13 comprises two symmetrically arranged positioning half tubes 131, the positioning half tubes 131 are positioned at the end part of the sleeve half tube 11 facing the cutting end 21, the cross sections of the positioning half tubes 131 along the length direction of the positioning half tubes are arranged in a semicircular structure, the open ends of the two positioning half tubes 131 are also abutted against each other to form a positioning tube 13 in the abutting process of the open ends of the two sleeve half tubes 11, the cutting end 21 penetrates through the sleeve 1 in the process of inserting the needle core 2 into the sleeve 1 and then extends out of the end part of the positioning tube 13, and the operating end 22 also extends out of the tail end of the sleeve 1; the positioning tube 13 is used for being inserted into muscle tissue from the incision after the needle core 2 pierces the incision, so that the sleeve 1 is positioned, and the dialysis catheter is conveniently stretched into the abdominal cavity. The outer diameter of the positioning tube 13 is gradually increased from the end part of the positioning tube 13 to the joint of the positioning tube 13 and the sleeve 1, and the end surface of the positioning tube 13 is arranged in an inclined surface structure. The conical positioning tube 13 arranged in the structure can be conveniently inserted into muscle tissues, and in the process of inserting the positioning tube 13 into the muscle tissues from the incision, the positioning tube 13 can enable the muscle tissues around the incision to spread to the periphery, so that the wound incision is reduced.
The outer side walls of the positioning tube 13 and the end part of the needle core 2 are provided with titanium coatings with good biocompatibility. So that the positioning tube 13 and the needle core 2 can not react in the abdominal cavity when extending into the abdominal cavity, and the use safety and stability of the trocar are improved.
The negative pressure detecting device 5 includes an injector 51 communicating with the infusion tube 4 and a pressure measuring tube 52 for detecting the pressure in the infusion tube 4. The negative pressure detection device 5 is used for injecting detection liquid into the infusion channel 23, and can be used for referring to a transfusion bottle, and whether the detection liquid in the infusion channel 23 is injected into the abdominal cavity can be conveniently observed by observing the dropper of the transfusion bottle; the negative pressure detection device 5 of the application comprises the injector 51 and the pressure measuring tube 52, the detection liquid in the infusion tube 4 can be formed into a certain pressure through the injector 51 and displayed through the pressure measuring tube 52, when the needle core 2 pierces into the abdominal cavity, the detection liquid in the infusion tube 4 can be injected into the abdominal cavity, and the level line of the detection liquid in the pressure measuring tube 52 can be lowered, so that medical staff can more intuitively observe the in-place condition of the needle core 2.
The two side end surfaces of the opening end of the sleeve half pipe 11 are provided with limit strips 112 in a protruding mode, the width dimension of each limit strip 112 is half of the thickness dimension of the pipe wall of the sleeve half pipe 11, one limit strip 112 is located on the inner side of one side end surface, and the other limit strip 112 is located on the outer side of the other side end surface. The setting of spacing 112 can make things convenient for the accurate lock joint of two cover half pipes 11, avoids dislocation of two cover half pipes 11 and influences the assembly efficiency when adorning the cover clamp 3. And the two sleeve half pipes 11 are arranged in a central symmetrical structure, and one sleeve half pipe 11 can be assembled only by setting one pair of processing dies when the sleeve half pipe 11 is processed, so that the processing cost is reduced.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the present invention may occur to one skilled in the art without departing from the principles of the present invention and are intended to be within the scope of the present invention.
Claims (10)
1. The utility model provides a peritoneal dialysis trocar, includes sleeve pipe (1) and peg graft in nook closing member (2) in sleeve pipe (1), characterized by: the sleeve (1) comprises two sleeve half pipes (11) which are symmetrically arranged, the cross sections of the sleeve half pipes (11) along the length direction of the sleeve half pipes are arranged in a semicircular structure, the opening ends of the two sleeve half pipes (11) are abutted against each other to form the sleeve (1), the outer side wall of the sleeve (1) is sleeved with a clamp (3), and the sleeve (1) is provided with a fixing device (12) for fixing the clamp (3);
the needle core (2) comprises a cutting end (21) positioned at the head end and used for cutting a notch, and an operating end (22) positioned at the tail end and used for operating the needle core (2), wherein the cutting end (21) penetrates through the sleeve (1) and then extends out of the end of the sleeve (1) in the process of inserting the needle core (2) into the sleeve (1), and the operating end (22) also extends out of the tail end of the sleeve (1);
The cutting end (21) is arranged in a conical structure, the small-diameter end of the cutting end (21) is positioned at the top end of the needle core (2), at least one cutting edge (211) is convexly arranged on the outer side wall of the cutting end (21), the length direction of the cutting edge (211) is arranged in a spiral structure along the outer side wall of the cutting end (21), each cutting edge (211) is only provided with one circle, the head end to the tail end of the cutting edge (211) winds the outer side wall of the cutting end (21) for one circle, the pitch size of the cutting edge (211) in the spiral structure is equal to the length size of the cutting end (21), the cutting edge of the cutting edge (211) is obliquely arranged towards the small-diameter end of the cutting end (21), the cutting edge (211) comprises oblique guide surfaces (2111) positioned at two sides of the cutting edge, and when the cutting edge of the cutting edge (211) cuts out an incision on muscle tissue, the oblique guide surfaces (2111) guide muscle tissue at two sides of the incision to two sides;
An infusion channel (23) for infusion is coaxially arranged on the needle core (2), one end of the infusion channel (23) penetrates through the operation end (22) and is connected with an infusion tube (4) in a sealing mode, the other end of the infusion channel is communicated with the cutting end (21) to form a blind hole structure, a plurality of infusion holes (212) communicated with the infusion channel (23) are formed in the cutting end (21), one end of each infusion hole (212) is communicated with the infusion channel (23), and the other end of each infusion hole penetrates through the outer side wall of the cutting end (21);
the other end of the infusion tube (4) is connected with a negative pressure detection device (5) for injecting detection liquid into the infusion channel (23) in a sealing way, and the negative pressure detection device (5) can flow out the detection liquid in the infusion channel (23) from the infusion hole (212).
2. A peritoneal dialysis trocar as claimed in claim 1, wherein: the infusion tube (4) comprises an infusion tube (41) communicated with the infusion channel (23) and an infusion tube (42) connected with the negative pressure detection device (5), wherein the infusion tube (41) is used for connecting the infusion tube (42), a first inner tube (411) and a first outer tube (412) which are coaxial are arranged at the joint of the infusion tube (41) and the infusion tube, and the end face of the first inner tube (411) is positioned in the first outer tube (412); the two infusion tubes (42) are used for connecting a second inner tube (421) and a second outer tube (422) which are coaxial at the joint of the first infusion tube (41), the end face of the second inner tube (421) is positioned in the second outer tube (422), a first gap (413) for inserting the second outer tube (422) is reserved between the first inner tube (411) and the first outer tube (412), and a second gap (423) for inserting the first inner tube (411) is reserved between the second inner tube (421) and the second outer tube (422);
The second inner tube (421) is arranged in a conical structure, the small diameter end of the second inner tube (421) faces the first inner tube (411), the outer diameter size of the small diameter end of the second inner tube (421) is smaller than the inner diameter size of the first inner tube (411), and the outer diameter size of the large diameter end of the second inner tube (421) is larger than the inner diameter size of the first inner tube (411);
The first outer tube (412) is used for connecting a first buckling ring (4121) protruding on the inner side wall of the connecting end of the second outer tube (422), the second outer tube (422) is used for connecting a second buckling ring (4221) protruding on the outer side wall of the connecting end of the first outer tube (412), the first buckling ring (4121) slides through the second buckling ring (4221) and then is buckled with the second buckling ring (4221) in the process that the second outer tube (422) is inserted into the first gap (413), and the conical outer side wall of the second inner tube (421) can keep abutting sealing with the opening end of the first inner tube (411) when the first buckling ring (4121) is buckled with the second buckling ring (4221).
3. A peritoneal dialysis trocar as claimed in claim 2, wherein: the infusion tube comprises an infusion tube body (41), an infusion tube (42), a first inner tube (411) and a second inner tube (421), wherein the joint of the infusion tube body (41) and the infusion tube body (42) is located in the middle of the infusion tube body (4), the first inner tube (411) is made of medical elastic plastic, the second inner tube (421) is made of medical hard materials, the first outer tube (412) and the second outer tube (422) are made of medical hard materials, an elastic slit (43) for shrinking or expanding a tube wall is formed in the side wall of the first outer tube (412) and/or the side wall of the second outer tube (422), and the elastic slit (43) penetrates the tube wall to form a stomach.
4. A peritoneal dialysis trocar as claimed in any one of claims 1 to 3, wherein: the fixing device (12) comprises a turnover buckling arm (121) with one end hinged to the outer side wall of the sleeve half pipe (11) and a torsion spring for driving the other end of the turnover buckling arm (121) to be attached to the outer side wall of the sleeve half pipe (11), one end, far away from the hinged end, of the turnover buckling arm (121) is provided with a buckling block (122) for being buckled on the outer side wall of the end part of the clamp (3), and the turnover buckling arm (121) is outwards turned around the hinged part until the length direction of the turnover buckling arm (121) is perpendicular to the length direction of the sleeve (1), wherein the distance between the inner side wall of the buckling block (122) and the outer side wall of the sleeve (1) is matched with the pipe wall thickness of the clamp (3);
the overturning buckling arm (121) is buckled with the clamp (3) sleeved on the sleeve (1) under the acting force of the torsion spring in the process of outwards overturning the hinging part, and the inner side wall of the buckling block (122) is always in abutting connection with the outer side wall of the clamp (3).
5. A peritoneal dialysis trocar as claimed in claim 4, wherein: the clamping block (122) is provided with a positioning groove (123) on the inner side wall close to one side of the overturning and buckling arm (121), the outer side wall of the clamp (3) is convexly provided with a positioning convex ring (31) which can be buckled by the positioning groove (123), and the width dimension of the positioning convex ring (31) is matched with the width dimension of the positioning groove (123); the positioning convex ring (31) can be embedded into the positioning groove (123) in the process that the overturning buckling arm (121) is buckled with the clamp (3) under the acting force of the torsion spring.
6. A peritoneal dialysis trocar as claimed in claim 4, wherein: the sleeve half pipe (11) is provided with an embedding groove (111) for embedding the overturning buckling arm (121) on the outer side wall, the depth dimension of the embedding groove (111) is matched with the thickness dimension of the overturning buckling arm (121), and the overturning buckling arm (121) is embedded into the embedding groove (111) under the acting force of the torsion spring in the overturning process of the overturning buckling arm (121) around the hinging position to the outer side wall of the sleeve half pipe (11).
7. A peritoneal dialysis trocar as claimed in claim 1, wherein: the end part of the sleeve (1) facing the cutting end (21) is provided with a positioning tube (13) for being inserted into muscle tissues, the positioning tube (13) comprises two positioning half tubes (131) which are symmetrically arranged, the positioning half tubes (131) are positioned at the end part of the sleeve half tube (11) facing the cutting end (21), the cross sections of the positioning half tubes (131) along the length direction of the positioning half tubes are arranged in a semicircular structure, the opening ends of the two positioning half tubes (131) are also abutted against each other in the abutting process of the opening ends of the two sleeve half tubes (11) to form the positioning tube (13), the cutting end (21) extends out from the end part of the positioning tube (13) after penetrating through the sleeve (1) in the process of inserting the needle core (2), and the operating end (22) also extends out from the tail end of the sleeve (1);
The outer diameter of the positioning tube (13) is gradually increased from the end part of the positioning tube (13) to the joint of the positioning tube (13) and the sleeve (1), and the end surface of the positioning tube (13) is in an inclined surface structure.
8. A peritoneal dialysis trocar as claimed in claim 7, wherein: the outer side walls of the end parts of the positioning tube (13) and the needle core (2) are respectively provided with a titanium coating with good biocompatibility.
9. A peritoneal dialysis trocar as claimed in claim 1, wherein: the negative pressure detection device (5) comprises an injector (51) communicated with the infusion tube (4) and a pressure measuring tube (52) for detecting the pressure in the infusion tube (4).
10. A peritoneal dialysis trocar as claimed in claim 1, wherein: limiting strips (112) are arranged on the end faces of the two sides of the opening end of the sleeve half pipe (11) in a protruding mode, the width size of each limiting strip (112) is half of the pipe wall thickness size of the sleeve half pipe (11), one limiting strip (112) is located on the inner side of one side end face, and the other limiting strip (112) is located on the outer side of the other side end face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810125927.6A CN108355190B (en) | 2018-02-07 | 2018-02-07 | Peritoneal dialysis trocar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810125927.6A CN108355190B (en) | 2018-02-07 | 2018-02-07 | Peritoneal dialysis trocar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108355190A CN108355190A (en) | 2018-08-03 |
| CN108355190B true CN108355190B (en) | 2024-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810125927.6A Active CN108355190B (en) | 2018-02-07 | 2018-02-07 | Peritoneal dialysis trocar |
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| Country | Link |
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| CN (1) | CN108355190B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113208709B (en) * | 2021-07-08 | 2021-11-02 | 上海介入医疗器械有限公司 | Development enhanced puncture sheath tube and puncture assembly |
| CN114306884A (en) * | 2022-01-05 | 2022-04-12 | 复旦大学附属中山医院 | A double-layer telescoping bendable super-selective catheter |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084729A (en) * | 1993-06-16 | 1994-04-06 | 洛马林达大学医学中心 | Be used for the operating trocar of splanchnoscopy and help into device |
| US5913867A (en) * | 1996-12-23 | 1999-06-22 | Smith & Nephew, Inc. | Surgical instrument |
| CN2368459Y (en) * | 1999-03-24 | 2000-03-15 | 郭自明 | Rotary cutter for medical purpose |
| DE10008190A1 (en) * | 2000-02-23 | 2001-09-20 | Aesculap Ag & Co Kg | Rod with cylindrical shaft has pointed end, triangular grooved recess next to point, side surface |
| CN208611448U (en) * | 2018-02-07 | 2019-03-19 | 温州市中心医院 | A peritoneal dialysis trocar |
-
2018
- 2018-02-07 CN CN201810125927.6A patent/CN108355190B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084729A (en) * | 1993-06-16 | 1994-04-06 | 洛马林达大学医学中心 | Be used for the operating trocar of splanchnoscopy and help into device |
| US5913867A (en) * | 1996-12-23 | 1999-06-22 | Smith & Nephew, Inc. | Surgical instrument |
| CN2368459Y (en) * | 1999-03-24 | 2000-03-15 | 郭自明 | Rotary cutter for medical purpose |
| DE10008190A1 (en) * | 2000-02-23 | 2001-09-20 | Aesculap Ag & Co Kg | Rod with cylindrical shaft has pointed end, triangular grooved recess next to point, side surface |
| CN208611448U (en) * | 2018-02-07 | 2019-03-19 | 温州市中心医院 | A peritoneal dialysis trocar |
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|---|---|
| CN108355190A (en) | 2018-08-03 |
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