CN108852505B - Intra-cavity target tissue cutter - Google Patents
Intra-cavity target tissue cutter Download PDFInfo
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- CN108852505B CN108852505B CN201811061088.2A CN201811061088A CN108852505B CN 108852505 B CN108852505 B CN 108852505B CN 201811061088 A CN201811061088 A CN 201811061088A CN 108852505 B CN108852505 B CN 108852505B
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- 238000005520 cutting process Methods 0.000 claims abstract description 308
- 210000004204 blood vessel Anatomy 0.000 claims description 14
- 230000002439 hemostatic effect Effects 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 7
- 238000005481 NMR spectroscopy Methods 0.000 claims description 4
- 239000008280 blood Substances 0.000 claims description 3
- 210000004369 blood Anatomy 0.000 claims description 3
- 230000004087 circulation Effects 0.000 claims description 3
- 238000009297 electrocoagulation Methods 0.000 claims description 3
- 230000015271 coagulation Effects 0.000 description 5
- 238000005345 coagulation Methods 0.000 description 5
- 230000017531 blood circulation Effects 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 3
- 206010020718 hyperplasia Diseases 0.000 description 3
- 206010028980 Neoplasm Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000001035 gastrointestinal tract Anatomy 0.000 description 2
- 206010068356 Biliary polyp Diseases 0.000 description 1
- 208000000059 Dyspnea Diseases 0.000 description 1
- 206010013975 Dyspnoeas Diseases 0.000 description 1
- 208000031481 Pathologic Constriction Diseases 0.000 description 1
- 208000007536 Thrombosis Diseases 0.000 description 1
- 206010065584 Urethral stenosis Diseases 0.000 description 1
- 206010057469 Vascular stenosis Diseases 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003190 augmentative effect Effects 0.000 description 1
- 210000000941 bile Anatomy 0.000 description 1
- 210000003445 biliary tract Anatomy 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 210000000621 bronchi Anatomy 0.000 description 1
- 208000006170 carotid stenosis Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000002872 contrast media Substances 0.000 description 1
- 208000029078 coronary artery disease Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000916 dilatatory effect Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000915 pathological change Toxicity 0.000 description 1
- 230000036285 pathological change Effects 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 231100000241 scar Toxicity 0.000 description 1
- 230000028327 secretion Effects 0.000 description 1
- 230000036262 stenosis Effects 0.000 description 1
- 208000037804 stenosis Diseases 0.000 description 1
- 210000003708 urethra Anatomy 0.000 description 1
- 201000001988 urethral stricture Diseases 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000012800 visualization Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00571—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body for achieving a particular surgical effect
- A61B2018/00601—Cutting
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
- A61B2018/1405—Electrodes having a specific shape
- A61B2018/144—Wire
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- Health & Medical Sciences (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Otolaryngology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Plasma & Fusion (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
The invention relates to a cutter, in particular to an intracavity target tissue cutter, and belongs to the technical field of medical appliances. According to the technical scheme provided by the invention, the intracavity target tissue cutter comprises an inner rod and an outer tube sleeved on the inner rod, wherein the outer tube can move on the inner rod along the length direction of the inner rod; the cutting device also comprises a cutting body capable of cutting the target tissue in the cavity, wherein a first cutting connecting end of the cutting body is connected with the head end of the outer tube, a second cutting connecting end of the cutting body is connected with the head end of the inner rod, and the second cutting connecting end is positioned outside the head end of the outer tube; when the outer tube moves relative to the inner rod and the first connecting end and the second connecting end are close to each other, the cutting body can arch to form an arc shape, and the arc-shaped cutting body can be used for carrying out required cutting on target tissues. The invention has compact structure, wide application range, convenient use, safety and reliability, and can effectively realize the cutting of target tissues in a cavity.
Description
Technical Field
The invention relates to a cutter, in particular to an intracavity target tissue cutter, and belongs to the technical field of medical appliances.
Background
When some of the human body channels are subjected to pathological changes and hyperplasia, the channels can be narrow and even blocked, and the functions of the human body are seriously influenced. Vascular stenosis caused by target tissue within the lumen of a blood vessel, such as: coronary heart disease, carotid stenosis, and the like. Dyspnea caused by target tissue within the bronchi, such as: tracheobronchial tumor, prayer stenosis caused by scar hyperplasia after tracheotomy healing, etc. Urethral stricture due to adhesion of damaged inner wall, etc. Bile secretion abnormality caused by biliary polyp, and the like. Tumor lesions and the like caused by hyperplasia of the inner wall of the digestive tract.
In the urethra, respiratory tract, digestive tract and biliary tract, the target tissue can be treated under visual conditions due to the development of video technology. But existing processing tools such as: the U-shaped knife and the T-shaped knife are inconvenient to operate during cutting because the cutting movement direction is consistent with the long axis of the cavity, and the technology is difficult to master. In clinical need of a cutting process, a cutting tool with a cutting movement direction perpendicular to the long axis direction of the lumen is required. However, since the surgical tool under the endoscope is required to be placed through the endoscope operation hole, the surgical tool must pass through the endoscope operation hole, and the outer diameter of the surgical tool must be smaller than the inner diameter of the endoscope operation hole. The cutting tool is perpendicular to the operation cavity, the effective outer diameter of the operation tool is increased, the implementation difficulty is high, and the implementation tool is lacking clinically at present.
Meanwhile, in the blood vessel cavity, because of the existence of blood flow, the visualization can not be realized basically, and the blood vessel cavity can only be positioned indirectly, namely, the contrast agent is injected into the blood vessel cavity under the intervention condition, and meanwhile, the state in the blood vessel is judged indirectly by using a large-scale developing instrument. An important medical treatment scheme for vascular proliferation is to place a bracket at a narrow part and open a cavity channel of the narrow part. However, before the stent is placed, the internal target tissue of the narrow part needs to be longitudinally cut, so that the stent can fully prop up the lumen of the narrow part after the stent is placed. At present, when the cutting tool is used for dilating and cutting a narrow part, the inner cavity of a blood vessel is completely blocked, so that the blood flow of the narrow part is temporarily blocked, discomfort of a patient is increased, and the operation risk is increased. For safety, the interventional doctor needs to shorten the blood flow blocking time as much as possible, shorten the operation time and greatly improve the operation difficulty. There is a clinical need for a crevice cutting tool that maintains blood flow when cutting a stenosed site of a blood vessel.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an intracavity target tissue cutter which is compact in structure, wide in application range, convenient to use, safe and reliable and can effectively cut intracavity target tissues.
According to the technical scheme provided by the invention, the intracavity target tissue cutter comprises an inner rod and an outer tube sleeved on the inner rod, wherein the outer tube can move on the inner rod along the length direction of the inner rod;
The cutting device also comprises a cutting body capable of cutting the target tissue in the cavity, wherein a first cutting connecting end of the cutting body is connected with the head end of the outer tube, a second cutting connecting end of the cutting body is connected with the head end of the inner rod, and the second cutting connecting end is positioned in front of the head end of the outer tube;
The outer tube moves relative to the inner rod, when the cutting first connecting end and the cutting second connecting end are close to each other, the cutting body can arch to form an arc shape, and the arc-shaped cutting body can be used for cutting target tissues as required;
When the outer tube moves relative to the inner rod and the first connecting end and the second connecting end are far away from each other, the cutting body can be gradually straightened, so that the cutting body is adjacent to the outer wall of the inner rod.
The cutting body comprises a plurality of elastic cutting strips outside the head end of the inner rod, a first cutting connecting end of each elastic cutting strip is fixedly connected with the head end of the outer tube, and a second cutting connecting end of each elastic cutting strip is fixedly connected with the head end of the inner rod.
The cutting body comprises an elastic cutting conducting strip and a connecting plug which is used for being electrically connected with the elastic cutting conducting strip, a cutting first connecting end of the elastic cutting conducting strip is connected with the head end of the outer tube, a cutting second connecting end of the elastic cutting conducting strip is connected with the head of the inner rod, and the cutting first connecting end and the cutting second connecting end of the elastic cutting conducting strip are respectively positioned at two sides of the axis of the inner rod;
when the connecting plug is connected with the electric knife power supply and the cutting first connecting end and the cutting second connecting end of the elastic cutting conducting strip are close to each other, the elastic cutting conducting strip can be used for carrying out electric cutting on target tissues;
the hemostatic connecting plug is electrically connected with the elastic cutting conductive strip, and the elastic cutting conductive strip can be electrically connected with an electrocoagulation power supply through the hemostatic connecting plug.
The head of the inner rod is provided with a cutting connection limiting body, a cutting second connecting end of the elastic cutting conducting strip is connected with the cutting connection limiting body, and when the cutting first connecting end and the cutting second connecting end of the elastic cutting conducting strip are close to each other, the cutting connection limiting body can be used for limiting the relative movement between the inner rod and the outer tube; the cutting connection limiting body is in a block shape or an annular shape.
The head of the inner rod or the head end of the outer tube is provided with a positioning body which can be developed under X-ray and nuclear magnetic resonance.
The head part of the inner rod is also provided with a plurality of inner rod holes, the inner rod holes are connected with the inner rod, and the tail end of the inner rod is also provided with an inner rod connector; the head of the outer tube is provided with an outer tube hole penetrating through the wall of the outer tube, and the outer tube hole is communicated with the inner rod hole.
The side wall of the outer tube penetrating out of the tail part of the inner rod is provided with a length scale for indicating the relative movement distance between the inner rod and the outer tube, and the movement distance between the inner rod and the outer tube is indicated by the length scale, so that the arc radian of the cutting body can be determined.
The lengths of the elastic cutting strips are different, and the elastic cutting strips are distributed on the outer side of the head end of the inner rod according to the length change; the outer tube moves relative to the inner rod and when the cut first connecting end and the cut second connecting end are close to each other, all the arc-shaped elastic cutting strips form a spherical shape at the head end of the inner rod.
And a connection locking mechanism for locking the outer tube and the inner rod to each other.
An inner rod guide hole allowing the guide wire to penetrate is formed in the inner rod, and the inner rod guide hole penetrates the inner rod.
The invention has the advantages that: the cutting first connecting end of the cutting body is connected with the head end of the outer tube, the cutting second connecting end of the cutting body is connected with the head end of the inner rod, and the cutting second connecting end is positioned outside the head end of the outer tube; the outer tube moves relative to the inner rod, when the cutting first connecting end and the cutting second connecting end are close to each other, the cutting body can arch to form an arc shape, and the arc-shaped cutting body can be used for cutting target tissues as required; the cutting device can effectively cut target tissues in the cavity, can adapt to cutting requirements of different conditions by utilizing different implementation structures of the cutting body, and has the advantages of wide application range, convenience in use, safety and reliability.
Drawings
FIG. 1 is a schematic view of a cutting body of the present invention using an elastic cutting strip.
Fig. 2 is a schematic view of the resilient cutting strip of fig. 1 arched in an arc.
Fig. 3 is a schematic view of the present invention in which a guidewire placement hole is provided in the inner rod.
Fig. 4 is a schematic view of the cutting body of the present invention using elastic cutting conductive strips.
Fig. 5 is a schematic view of the spring cut conductive strip of fig. 4 arched in an arc.
FIG. 6 is a schematic view of the present invention in which an inner rod hole is provided in an inner rod.
Fig. 7 is a schematic view of the spring cut conductive strip of fig. 6 arched in an arc.
FIG. 8 is a schematic view of another distribution of the elastic cutting band of the present invention on the inner rod.
FIG. 9 is a schematic view of the shape of the arcuate resilient cutting strip of FIG. 8 at the head end of the inner rod.
Reference numerals illustrate: 1-outer tube, 2-inner rod, 3-elastic cutting strip, 4-locking bolt, 5-outer tube handle, 6-inner rod handle, 7-friction increasing part, 8-electric coagulation connecting plug connecting cable, 9-connecting plug, 10-inner rod connector, 11-hemostatic connecting plug connecting cable, 12-hemostatic connecting plug, 13-cutting connection limiting body, 14-inner rod hole, 15-elastic cutting conducting strip and 16-inner rod guiding hole.
Detailed Description
The invention will be further described with reference to the following specific drawings and examples.
In order to effectively realize the cutting of target tissues in a cavity, the invention comprises an inner rod 2 and an outer tube 1 sleeved on the inner rod 2, wherein the outer tube 1 can move on the inner rod 2 along the length direction of the inner rod 2;
The cutting device also comprises a cutting body capable of cutting target tissues in the cavity, wherein a first cutting connecting end of the cutting body is connected with the head end of the outer tube 1, a second cutting connecting end of the cutting body is connected with the head end of the inner rod 2, and the second cutting connecting end is positioned in front of the head end of the outer tube 1;
The outer tube 1 moves relative to the inner rod 2, and when the cutting first connecting end and the cutting second connecting end are close to each other, the cutting body can arch to form an arc shape, and the arc-shaped cutting body can be used for cutting target tissues as required;
When the outer tube 1 moves relative to the inner rod 2 and the cutting first connecting end and the cutting second connecting end are far away from each other, the cutting body can be gradually straightened, so that the cutting body is closely adjacent to the outer wall of the inner rod 2.
Specifically, the outer tube 1, the inner rod 2 and the cutting body are made of materials meeting medical standards, the length of the inner rod 2 is greater than that of the outer tube 1, the outer tube 1 is sleeved on the inner rod 2, the outer tube 1 and the inner rod 2 are coaxially distributed, the inner diameter of the outer tube 1 is slightly greater than the outer diameter of the inner rod 2, accordingly the outer tube 1 and the inner rod 2 can move relative to each other, the length direction of the outer tube 1 is consistent with the length direction of the inner rod 2, and the outer tube 1 is located between the head end of the inner rod 2 and the tail end of the inner rod 2.
The cutting body has the first link of cutting and cuts the second link, and the first link of cutting corresponds with the second link of cutting, and the first link of cutting is connected with the head end of outer tube 1, and the second link of cutting body is connected with the head end of interior pole 2, because the head end of interior pole 2 is located the outside of outer tube 1 head end, consequently, the second link of cutting is located the outside of outer tube 1 head end.
When the outer tube 1 and the inner rod 2 move mutually, the first connecting end and the second connecting end can be mutually adjacent or far away, when the first connecting end and the second connecting end are mutually adjacent, the cutting body can arch to form an arc, the arc cutting body can be used for cutting target tissues in a cavity, and the convenience of cutting operation is improved.
When the outer tube 1 moves relative to the inner rod 2 and the cutting first connecting end and the cutting second connecting end are far away from each other, the cutting body can be gradually straightened, so that the cutting body is closely adjacent to the outer wall of the inner rod 2. The outer diameter of the whole cutting body can be reduced after the cutting body is closely adjacent to or stuck on the outer wall of the inner rod 2, so that the outer tube 1 and the inner rod 2 can be conveniently withdrawn from the cut cavity after the cutting is completed. The target tissue may be diseased, augmented or normal tissue, as determined by the actual cutting requirements.
As shown in fig. 1 and fig. 2, the cutting body includes a plurality of elastic cutting strips 3 uniformly distributed on the outer side of the head end of the inner rod 2, a cutting first connecting end of the elastic cutting strips 3 is fixedly connected with the head end of the outer tube 1, and a cutting second connecting end of the elastic cutting strips 3 is fixedly connected with the head end of the inner rod 2.
In the embodiment of the invention, the elastic cutting strips 3 are strip-shaped and made of elastic materials, namely, the elastic cutting strips 3 can realize arch and shrinkage, the elastic cutting strips 3 are uniformly distributed on the outer side of the head of the inner rod 2, the cutting first connecting end of the elastic cutting strips 3 is connected with the head end of the outer tube 1, and the cutting second connecting end of the elastic cutting strips 3 is connected with the head end of the inner rod 2, so that the length direction of the elastic cutting strips 3 is consistent with the length direction of the inner rod 2. In fig. 1 and 2, four evenly distributed elastic cutting bars 3 are provided at the head of the inner rod 2.
When the first cutting connecting end of the elastic cutting strip 3 and the second cutting connecting end of the elastic cutting strip 3 are close to each other, the elastic cutting strip 3 can arch to form an arc, and the contact between the elastic cutting strip 3 and the target tissue in the cavity can be utilized to prop up the target tissue in the cavity, so that the aim of cutting the target tissue in the cavity is fulfilled. When the cutting is completed, the inner rod 2 and the outer tube 1 only need to move relatively again, so that the first cutting connecting end of the elastic cutting strip 3 and the second cutting connecting end of the elastic cutting strip 3 are far away from each other. When the cutting first connecting end and the cutting second connecting end of the cutting bar 3 are far away from each other, the cutting bar 3 is changed from an arched arc shape into a bar shape, so that the whole elastic cutting bar 3, the inner rod 2 and the outer tube 1 are conveniently removed from the cut cavity.
In addition, when the elastic cutting bar 3 is used for cutting, the inner rod 2 and the outer tube 1 need to be kept stable, namely, a connecting locking mechanism for locking the inner rod 2 and the outer tube 1 with each other is further included, the connecting locking mechanism can adopt a locking bolt 4, the locking bolt 4 can lock the inner rod 2 and the outer tube 1 with each other by using the locking bolt 4 at the tail parts of the inner rod 2 and the outer tube 1 corresponding to each other, and therefore, the inner rod 2 and the outer tube 1 cannot rotate with each other. In general, when locking, the locking bolt 4 can be in contact with the inner rod 2 after passing through the outer tube 1, and after tightening the locking bolt 4, locking between the outer tube 1 and the inner rod 2 can be achieved. Of course, the connection locking mechanism can also adopt other forms, such as adopting screw thread structure to connect between the outer tube 1 and the inner rod 2, when the screw thread structure can make the relative rotation between the outer tube 1 and the inner rod 2, can convert into corresponding rectilinear motion of the outer tube 1 and the inner rod 2, the screw thread structure can specifically adopt the existing commonly used structural form, and the description is omitted here. In the concrete implementation, the connection locking mechanism can be used for controlling the arched state of the elastic cutting strip 3, namely controlling the arched radian. In addition, the tail part of the inner rod 2 is also provided with a friction increasing part 7, and friction force can be increased by utilizing the friction increasing part 7, so that the inner rod 2 and the outer tube 1 can be conveniently matched in a moving way.
As shown in fig. 4 and 5, the cutting body includes an elastic cutting conductive strip 15 and a connection plug 9 for electrically connecting with the elastic cutting conductive strip 15, a cutting first connection end of the elastic cutting conductive strip 15 is connected with the head end of the outer tube 1, a cutting second connection end of the elastic cutting conductive strip 15 is connected with the head of the inner rod 2, and the cutting first connection end and the cutting second connection end of the elastic cutting conductive strip 15 are respectively located at two sides of the axis of the inner rod 2;
When the connecting plug 9 is connected with the electric knife power supply and the cutting first connecting end and the cutting second connecting end of the elastic cutting conducting strip 15 are close to each other, the elastic cutting conducting strip 15 can be used for carrying out electric cutting on target tissues.
In the embodiment of the invention, the elastic cutting conductive strips 15 are made of conductive materials, and the cutting first connecting ends and the cutting second connecting ends of the elastic cutting conductive strips 15 are distributed on two sides of the axis of the inner rod 2, namely the elastic cutting conductive strips 15 are distributed in an inclined manner, and an included angle is formed between the length direction of the elastic cutting conductive strips 15 and the length direction of the inner rod 2.
The connecting plug 9 can be electrically connected with the elastic cutting conductive strip 15 through the connecting plug connecting cable 8, and can be connected with an external electric knife power supply through the connecting plug 9, when the connecting plug 9 is electrically connected with the electric knife power supply, the elastic cutting conductive strip 15 can have the characteristic of an electric knife, and therefore the elastic cutting conductive strip 15 can be cut like the electric knife. Of course, during cutting, the inner rod 2 and the outer tube 1 need to move relatively, so that the first cutting connecting end and the second cutting connecting end of the elastic cutting conductive strip 15 are adjacent to each other, and after arching to form an arc shape, the cutting of the target tissue can be effectively realized. When the cut first connection end and the cut second connection end are far away from each other, the elastic cut conductive strip 15 can be close to the outer wall of the head of the inner rod 2. Similarly to the above, after the cutting is completed, it is necessary to make the cut first connection end and the cut second connection end away from each other, so that the inner rod 2, the outer tube 1 and the elastic cut conductive strip 15 are withdrawn from the cavity.
In addition, a hemostatic connecting plug 12 electrically connected to the elastic cut conductive rod 15 is further included, and the elastic cut conductive rod 15 can be electrically connected to an electrocoagulation power supply through the hemostatic connecting plug 12. In the embodiment of the invention, the hemostatic connecting plug 12 is electrically connected with the elastic cutting conductive strip 15 through the hemostatic connecting plug connecting cable 11, and is electrically connected with an external electric coagulation power supply through the hemostatic connecting plug 12, when the hemostatic connecting plug 12 is connected with the electric coagulation power supply, the elastic cutting conductive strip 15 can have the characteristic of electric coagulation, so that the cut part can be subjected to hemostatic operation by utilizing the elastic cutting conductive strip 15 with the characteristic of electric coagulation. The elastic cutting conductive strip 15 also needs to arch to take an arc shape when performing the hemostatic operation.
Further, the cutting connection limiting body 13 is arranged at the head of the inner rod 2, the cutting second connecting end of the elastic cutting conducting strip 15 is connected with the cutting connection limiting body 13, and when the cutting first connecting end and the cutting second connecting end of the elastic cutting conducting strip 15 are close to each other, the cutting connection limiting body 13 is utilized to limit the relative movement between the inner rod 2 and the outer tube 1.
In the embodiment of the present invention, the shape of the cutting connection limiter 13 includes a block shape or a ring shape. The cutting connection limiting body 13 is arranged at the head of the inner rod 2, and the cutting second connecting end of the elastic cutting conducting strip 15 is connected with the cutting connection limiting body 13, so that the connection fit between the cutting second connecting end of the elastic cutting conducting strip 15 and the inner rod 2 is realized. The movement between the inner rod 2 and the outer tube 1 can be limited by the cutting connection limiting body 13, so that the cutting second connection end of the elastic cutting conducting strip 15 is prevented from entering the outer tube 1.
As shown in fig. 6 and 7, a plurality of inner rod holes 14 are further formed in the head of the inner rod 2, the inner rod holes 14 are connected with the inner rod 2, and an inner rod connector 10 is further arranged at the tail end of the inner rod 2.
In the embodiment of the invention, when the head end of the inner rod 2 is provided with the inner rod hole 14, the inner rod 2 is internally provided with a hollow tubular shape, the tail end of the inner rod 2 is provided with the inner rod connector 10, the suction or flushing effect can be formed through the inner rod hole 14, and when the suction effect is realized, the inner rod connector 10 is connected with negative pressure suction equipment; when the flushing action is to be achieved, the inner rod connector 10 is connected with a flushing device.
Further, the head of the outer tube 1 is provided with an outer tube hole penetrating through the wall of the outer tube 1, and the outer tube hole is communicated with the inner rod hole 14.
In the embodiment of the invention, the outer tube hole and the inner tube hole 14 can be communicated, and when the target tissue in the blood vessel is cut, the circulation of blood in the blood vessel is not influenced by the cooperation of the inner tube hole 14 and the outer tube hole.
The tail end of the outer tube 1 is provided with an outer tube handle 6, and the tail end of the inner rod 2 is provided with an inner rod handle 5. The inner rod handle 5 can be used for conveniently holding the inner rod, and the outer tube handle 6 can be used for conveniently holding the outer tube 1. In addition, the connecting and locking mechanism for locking the outer tube 1 and the inner rod 2 with each other is also included, and the connecting and locking mechanism is consistent with the connecting and locking mechanism in fig. 1 and 1, and specific reference may be made to the above description, and details are not repeated here.
As shown in fig. 3, an inner rod guide hole 16 allowing a guide wire to pass through is provided in the inner rod 2, and the inner rod guide hole 16 passes through the inner rod 2. In the embodiment of the invention, the inner rod guide hole 16 is positioned in the central area of the inner rod 2, the inner rod guide hole 16 penetrates through the inner rod 2, the guide wire can be placed in the inner rod 2 by using the inner rod guide hole 16, and the guide wire placed in the inner rod 2 can penetrate out of the inner rod 2, so that the whole cutter can be conveniently placed in a required cavity by using the guide wire in the inner rod 2.
Further, a positioning body capable of developing under X-ray and nuclear magnetic resonance is provided at the head of the inner rod 2 or the head of the outer tube 1. In the embodiment of the invention, the positioning body can be arranged at the head of the inner rod 2 or the head end of the outer tube 1, and when the positioning body is developed by utilizing X-ray and nuclear magnetic resonance, the positioning of the outer tube 1 and the inner rod 2 in the blood vessel can be realized.
Further, the side wall of the outer tube 1 penetrating out of the tail part of the inner rod 2 is provided with length scales for indicating the relative movement distance between the inner rod 2 and the outer tube 1, and the movement distance between the inner rod 2 and the outer tube 1 is indicated by the length scales, so that the arc radian of the cutting body can be determined.
In the embodiment of the invention, the length scale is arranged at the tail part of the inner rod 2, and the length scale is positioned outside the tail part of the outer tube 1 after the outer tube 1 is sleeved on the inner rod 2. When the inner rod 2 and the outer tube 1 move relatively, the relative movement distance between the inner rod 2 and the outer tube 1 can be indicated by the length scales. Because basic working parameters such as the cutting body are stable, when the inner rod 2 and the outer tube 1 relatively move, the arc of the cutting body can be determined according to the indicated movement distance, and the corresponding relation between the specific movement distance and the arc of the cutting body is well known to those skilled in the art and is not repeated herein.
Further, the inclination of the elastic cutting bars 3 is distributed outside the head end of the inner rod 2; the outer tube 1 moves relative to the inner rod 2 and when the cut first connecting end and the cut second connecting end are close to each other, all the arc-shaped elastic cutting strips 3 form a grid shape after crossing the head ends of the inner rod 2.
As shown in fig. 8 and 9, the elastic cutting bars 3 are obliquely distributed at the head end of the inner rod 2, and the lengths of the elastic cutting bars 3 may be the same or different lengths of the elastic cutting bars 3 may be used. When the elastic cutting strips 3 are in a straight state, the elastic cutting bodies 3 are obliquely distributed at the head end of the inner rod 2, when the lengths among the elastic cutting strips 3 are different, the elastic cutting strips 3 can be uniformly distributed at the head end of the inner rod 2 in a gradually longer or gradually shorter mode, and when all the elastic cutting strips 3 are in an arc shape, a grid structure can be formed at the head end of the inner rod 2, wherein the grid structure comprises a sphere shape or a net shape; specifically, when the cutting first connecting end and the cutting second connecting end are close to each other so that the elastic cutting strip 3 arches to form an arc shape, the elastic cutting strip 3 can form a sphere after crossing; when the first connecting end and the second connecting end are close to each other to the maximum state, the elastic cutting strips 3 can be in a net sheet shape after crossing, and the cleaning of blood clots and the like can be realized no matter in a spherical shape or a net sheet shape. Of course, when the first connecting end and the second connecting end are cut away from each other, the elastic cutting strip 3 can still restore to a straight state, so as not to influence the whole withdrawal from the cavity.
Claims (6)
1. An endoluminal target tissue cutter, characterized by: the device comprises an inner rod (2) and an outer tube (1) sleeved on the inner rod (2), wherein the outer tube (1) can move on the inner rod (2) along the length direction of the inner rod (2);
The cutting device also comprises a cutting body capable of cutting target tissues in the cavity, wherein a first cutting connecting end of the cutting body is connected with the head end of the outer tube (1), a second cutting connecting end of the cutting body is connected with the head end of the inner rod (2), and the second cutting connecting end is positioned in front of the head end of the outer tube (1);
The outer tube (1) moves relative to the inner rod (2) and enables the cutting body to arch to form an arc shape when the cutting first connecting end and the cutting second connecting end are close to each other, and the arc-shaped cutting body can be used for cutting target tissues as required;
the outer tube (1) moves relative to the inner rod (2), and when the first connecting end and the second connecting end are far away from each other, the cutting body can be gradually straightened, so that the cutting body is adjacent to the outer wall of the inner rod (2);
The cutting body comprises a plurality of elastic cutting strips (3) which are arranged on the outer side of the head end of the inner rod (2), a first cutting connecting end of each elastic cutting strip (3) is fixedly connected with the head end of the outer tube (1), and a second cutting connecting end of each elastic cutting strip (3) is fixedly connected with the head end of the inner rod (2);
The head part of the inner rod (2) is also provided with a plurality of inner rod holes (14), the inner rod holes (14) are connected with the inner rod (2), and the tail end of the inner rod (2) is also provided with an inner rod connector (10); the head of the outer tube (1) is provided with an outer tube hole penetrating through the tube wall of the outer tube (1), and the outer tube hole is communicated with the inner rod hole (14);
when the target tissue in the blood vessel is cut, the matching of the inner rod hole (14) and the outer tube hole is utilized so as not to influence the circulation of blood in the blood vessel;
The connecting locking mechanism is used for locking the outer tube (1) and the inner rod (2) with each other;
an inner rod guide hole (16) allowing a guide wire to penetrate is formed in the inner rod (2), and the inner rod guide hole (16) penetrates the inner rod (2).
2. The endoluminal target tissue cutter of claim 1 wherein: the elastic cutting strips (3) are obliquely distributed on the outer side of the head end of the inner rod (2); the outer tube (1) moves relative to the inner rod (2) and when the cutting first connecting end and the cutting second connecting end are close to each other, all the arc-shaped elastic cutting strips (3) are crossed at the head end of the inner rod (2) to form a grid shape.
3. An endoluminal target tissue cutter, characterized by: the device comprises an inner rod (2) and an outer tube (1) sleeved on the inner rod (2), wherein the outer tube (1) can move on the inner rod (2) along the length direction of the inner rod (2);
The cutting device also comprises a cutting body capable of cutting target tissues in the cavity, wherein a first cutting connecting end of the cutting body is connected with the head end of the outer tube (1), a second cutting connecting end of the cutting body is connected with the head end of the inner rod (2), and the second cutting connecting end is positioned in front of the head end of the outer tube (1);
The outer tube (1) moves relative to the inner rod (2) and enables the cutting body to arch to form an arc shape when the cutting first connecting end and the cutting second connecting end are close to each other, and the arc-shaped cutting body can be used for cutting target tissues as required;
the outer tube (1) moves relative to the inner rod (2), and when the first connecting end and the second connecting end are far away from each other, the cutting body can be gradually straightened, so that the cutting body is adjacent to the outer wall of the inner rod (2);
The cutting body comprises an elastic cutting conducting strip (15) and a connecting plug (9) which is electrically connected with the elastic cutting conducting strip (15), a cutting first connecting end of the elastic cutting conducting strip (15) is connected with the head end of the outer tube (1), a cutting second connecting end of the elastic cutting conducting strip (15) is connected with the head of the inner rod (2), and the cutting first connecting end and the cutting second connecting end of the elastic cutting conducting strip (15) are respectively positioned at two sides of the axis of the inner rod (2);
when the connecting plug (9) is connected with the electric knife power supply and the cutting first connecting end and the cutting second connecting end of the elastic cutting conducting strip (15) are close to each other, the elastic cutting conducting strip (15) can be used for carrying out electric cutting on target tissues;
The hemostatic connecting plug (12) is electrically connected with the elastic cutting conductive strip (15), and the elastic cutting conductive strip (15) can be electrically connected with an electrocoagulation power supply through the hemostatic connecting plug (12);
The head part of the inner rod (2) is also provided with a plurality of inner rod holes (14), the inner rod holes (14) are connected with the inner rod (2), and the tail end of the inner rod (2) is also provided with an inner rod connector (10); the head of the outer tube (1) is provided with an outer tube hole penetrating through the tube wall of the outer tube (1), and the outer tube hole is communicated with the inner rod hole (14);
when the target tissue in the blood vessel is cut, the matching of the inner rod hole (14) and the outer tube hole is utilized so as not to influence the circulation of blood in the blood vessel;
The connecting locking mechanism is used for locking the outer tube (1) and the inner rod (2) with each other;
an inner rod guide hole (16) allowing a guide wire to penetrate is formed in the inner rod (2), and the inner rod guide hole (16) penetrates the inner rod (2).
4. The endoluminal target tissue cutter of claim 3 wherein: a cutting connection limiting body (13) is arranged at the head part of the inner rod (2), a cutting second connecting end of the elastic cutting conducting strip (15) is connected with the cutting connection limiting body (13), and when a cutting first connecting end and a cutting second connecting end of the elastic cutting conducting strip (15) are mutually close, the cutting connection limiting body (13) can be utilized to limit the relative movement between the inner rod (2) and the outer tube (1); the cutting connection limiting body (13) is in a block shape or an annular shape.
5. The endoluminal target tissue cutter of claim 4 wherein: the head of the inner rod (2) or the head end of the outer tube (1) is provided with a positioning body which can be developed under X-ray and nuclear magnetic resonance.
6. The endoluminal target tissue cutter of claim 3 wherein: the side wall of the outer tube (1) penetrating out of the tail part of the inner rod (2) is provided with a length scale for indicating the relative movement distance between the inner rod (2) and the outer tube (1), and the movement distance between the inner rod (2) and the outer tube (1) is indicated by the length scale, so that the arc radian of the cutting body can be determined.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811061088.2A CN108852505B (en) | 2018-09-12 | 2018-09-12 | Intra-cavity target tissue cutter |
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| CN201811061088.2A CN108852505B (en) | 2018-09-12 | 2018-09-12 | Intra-cavity target tissue cutter |
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| CN108852505B true CN108852505B (en) | 2024-08-30 |
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| CN109730801B (en) * | 2018-12-19 | 2021-06-29 | 先健科技(深圳)有限公司 | Filter recovery device |
| CN113143582B (en) * | 2021-04-25 | 2023-02-10 | 江苏省人民医院（南京医科大学第一附属医院） | A string bag form tool bit that is arranged in vitrectomy operation to protect retina |
| CN113208701A (en) * | 2021-05-14 | 2021-08-06 | 刘晓瑞 | Tumor cutter |
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| WO2018040061A1 (en) * | 2016-09-02 | 2018-03-08 | 杭州安杰思医学科技有限公司 | Tissue incision device for endoscope |
| CN209332256U (en) * | 2018-09-12 | 2019-09-03 | 无锡圣诺亚科技有限公司 | Intracavitary destination organization cutter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6540695B1 (en) * | 1998-04-08 | 2003-04-01 | Senorx, Inc. | Biopsy anchor device with cutter |
| US6440147B1 (en) * | 1998-09-03 | 2002-08-27 | Rubicor Medical, Inc. | Excisional biopsy devices and methods |
| US20050154411A1 (en) * | 2001-08-23 | 2005-07-14 | Breznock Eugene M. | Method and apparatus for trephinating body vessels and hollow organ walls |
| WO2018161067A1 (en) * | 2017-03-03 | 2018-09-07 | Arizona Board Of Regents On Behalf Of The University Of Arizona | Biopsy system for enhanced tissue harvesting |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018040061A1 (en) * | 2016-09-02 | 2018-03-08 | 杭州安杰思医学科技有限公司 | Tissue incision device for endoscope |
| CN209332256U (en) * | 2018-09-12 | 2019-09-03 | 无锡圣诺亚科技有限公司 | Intracavitary destination organization cutter |
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