CN112043353A - PICC piercing depth - Google Patents

Abstract

The invention discloses a PICC (peripherally inserted central catheter) puncturing device which comprises a puncturing needle main body, a skin expanding tube and an outer sheath component, wherein the puncturing needle main body is provided with a needle body; the skin expanding tube is positioned in the puncture needle main body; a tearing opening extending along the axial direction of the puncture needle main body is formed on the side surface of the puncture needle main body; the outer sheath assembly comprises an outer sheath tube which is detachably connected with the skin expanding tube and a driving device which drives the outer sheath tube to move towards the skin expanding tube and pushes the skin expanding tube out of the puncture needle main body; the length of the sheath tube is larger than that of the puncture needle main body. The invention also discloses a puncture method, the skin expanding tube is arranged in the puncture needle main body, the skin expanding tube enters the vein along with the puncture needle, then the puncture needle exits the vein, the skin expanding tube is left in the vein, and finally the PICC tube is inserted into the vein along with the skin expanding tube, so that the PICC tube placement is completed.

Description

A PICC puncture device

technical field

The invention relates to the technical field of medical devices, in particular to a PICC puncturing device and a puncturing method.

Background technique

PICC catheterization is a central venous catheterization through peripheral venous puncture, which uses a catheter to puncture a vein in the peripheral arm, and the catheter reaches the large blood vessels close to the heart. Avoiding the direct contact between chemotherapy drugs and arm veins, coupled with the rapid blood return of large veins, can quickly dilute chemotherapy drugs and prevent drugs from stimulating blood vessels, so it can effectively protect upper limb veins, reduce the occurrence of phlebitis, and reduce the patient's pain. Pain and improve the patient's quality of life.

PICC cannulation includes the following steps: (1) puncture the vein with a puncture; (2) insert the guide wire 1 along the puncture needle into the superior vena cava; (3) pull out the puncture needle, and align the skin expander with the outer sheath assembly Insert the guide wire 1 into the superior vena cava; (4) withdraw the guide wire 1 and the skin expander; (5) insert the PICC tube (including the guide wire 2) into the superior vena cava along the outer sheath assembly; (6) pull out the external (7) Pull out the guide wire 2; (8) Reserve a 5cm PICC tube outside, and cut off the excess PICC tube; (9) Put the decompression sleeve on the PICC tube; (10) Then connect the PICC tube to the metal handle of the extension tube and snap it to the decompression sleeve.

In the prior art, when a catheter is placed on a patient, a tool is inserted into the patient's vein for many times in the pre-procedure work, which increases the pain of the patient.

In view of this, the applicant has conducted in-depth research on the above-mentioned problems, resulting in this case.

SUMMARY OF THE INVENTION

One of the objectives of the present invention is to provide a PICC puncturing device, which solves the problem of increasing the pain of the patient by inserting auxiliary tools into the vein of the patient many times due to the complicated operation steps of the existing PICC cannula.

The second object of the present invention is to provide a PICC puncturing device, which solves the problem that the existing PICC cannula is inserted into the patient's vein for many times due to the complicated operation steps, which increases the pain of the patient.

In order to achieve the above-mentioned purpose, the solution of the present invention is:

Provided is a PICC puncture device, comprising a puncture needle body, a skin expanding tube and an outer sheath assembly; the skin expanding tube is located in the puncture needle body; a tear extending along the axis direction of the puncture needle body is formed on the side of the puncture needle body The outer sheath assembly includes an outer sheath tube that is detachably connected to the skin expansion tube, and a driving device that drives the outer sheath tube to move in the direction of the skin expansion tube and pushes the skin expansion tube out of the puncture needle body; so The length of the outer sheath tube is greater than the length of the main body of the puncture needle.

Further, the drive device includes a drive screw, and a carrier for carrying the drive screw; the carrier includes a first connecting rod that is fixedly connected to an end of the outer sheath away from the main body of the puncture needle and is perpendicular to the outer sheath, and The second connecting rod is perpendicular to the first connecting rod and is fixedly connected to the end of the first connecting rod.

Further, the first connecting rod is provided with a first tube perforation passing through the first connecting rod and communicating with the outer sheath tube, and a first pipe through hole parallel to the first through hole and passing through the driving screw. Two through holes; the second connecting rod is provided with a slide rail arranged along the length direction of the second connecting rod.

Further, the driving device further includes a driving block that is detachably connected to the main body of the puncture needle; the driving block is provided with a sliding groove matched with the sliding rail, and a thread matched with the driving screw hole.

Further, the drive screw is provided with a drive handle that can be operated by the operator.

Further, one end of the outer sheath tube close to the main body of the puncture needle is provided with a connecting portion that is detachably connected to the skin expanding tube.

Further, the connecting portion includes a protruding section extending into the puncture needle main body, and an outer retaining section located outside the puncture needle main body, and the outer diameter of the protruding section is smaller than the internal diameter of the puncture needle main body.

Further, the outer retention section is in the shape of a truncated cone.

Further, the end of the extending section is formed with an annular snap-fit groove for snap-fit with the skin expanding tube.

Further, the side surface of the outer sheath tube is provided with a hand-held portion for the operator to hold; the hand-held portion is located above the connecting portion and is on the same side as the tear opening.

Further, the hand-held portion has a bottom surface and a top surface, and a first side surface and a second side surface connecting the bottom surface and the top surface, and the area of the bottom surface is smaller than that of the top surface.

Further, the main body of the puncture needle is provided with a connecting piece that is detachably connected to the driving block; the driving block is provided with a connecting groove into which the connecting piece can be inserted.

Further, a pre-inlet is formed at one end of the tear opening close to the outer retention section, and the opening width of the pre-inlet is larger than the opening width of the tear opening.

Further, the inner wall of the puncture needle body is covered with lubricant.

The present invention also provides a puncturing method, comprising the following steps:

(1) Insert the expanded skin tube into the vein along with the main body of the puncture needle;

(2) withdraw the main body of the puncture needle from the vein, and keep the expanding tube in the vein;

(3) Pass the PICC tube through the outer sheath and enter the vein along the expanding tube to reach the designated position;

(4) withdraw the expanding tube from the vein;

(5) Pull out the guide wire in the PICC tube;

(6) Reserve a section of PICC tube outside, and cut off the excess PICC tube;

(7) Put the decompression sleeve on the PICC pipe;

(8) Connect the PICC tube to the metal handle of the extension tube and snap it to the decompression sleeve.

Further, in the step (2), the main body of the puncture needle is pulled out of the vein along the outer sheath tube by driving the screw, and at the same time, the expanding skin tube continues to extend into the vein.

Further, the length of the PICC tube reserved in the step (6) is 5 cm.

After the above structure is adopted, a PICC puncture device and a puncture method according to the present invention are provided in which the skin expansion tube is placed in the main body of the puncture needle. When the puncture needle is puncturing, the skin expansion tube enters the patient's vein together with the puncture needle. The drive block connected to the main body of the puncture needle is driven by the driving screw on the outer sheath assembly to move the end of the outer sheath tube away from the puncture needle, thereby driving the main body of the puncture needle to move. There is an extended tear opening, so during the movement of the puncture needle, under the action of the conical connection part, the tear opening is slowly opened, so that the puncture needle can be pulled out along the outer sheath tube, and the skin expansion tube Continue to stay in the vein. When the dilation tube is completely separated from the puncture needle, the puncture needle can be removed from the outer sheath tube, and then the PICC tube can be inserted through the outer sheath tube, and enter the vein along the dilation tube to reach the puncture needle. After the designated position, slowly withdraw the expanding tube, leaving only the PICC tube in the vein, thus completing the PICC cannulation. Compared with the prior art, this case reduces the pre-procedural work before PICC cannulation, and greatly reduces the pain of the patient.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the exploded schematic diagram of the present invention;

3 is a schematic cross-sectional view of the present invention;

Fig. 4 is the partial enlarged view of A place in Fig. 3;

5 is a schematic diagram of the main body structure of the puncture needle in the present invention;

FIG. 6 is a schematic structural diagram of a driving block in the present invention.

In the figure: 1- puncture needle body, 11- tear opening, 111- pre-inlet, 12- connecting piece;

2- Expanded skin tube;

3- Outer sheath assembly, 31- Outer sheath tube, 311- Connection part, 3111- Extending section, 3111- Annular snap groove, 3112- Outer retaining section, 312- Hand-held part, 32- Driving device, 321- Driving screw , 3211-drive handle, 322-carriage, 3221-first connecting rod, 32211-first through hole, 32212-second through hole, 3222-second connecting rod, 32221-slide rail, 323-drive block, 3231 - Threaded holes, 3232-chutes, 3233-connecting grooves.

Detailed ways

In order to further explain the technical solutions of the present invention, the present invention will be described in detail below through specific embodiments.

As shown in Figures 1-6, a PICC puncture device includes a puncture needle body 1, a skin expanding tube 2 and an outer sheath assembly 3; the skin expanding tube 2 is located in the puncture needle body 1; The tear opening 11 extending in the axial direction of the puncture needle body 1; the outer sheath assembly 3 includes an outer sheath tube 31 that is detachably connected to the skin expansion tube 2, and drives the outer sheath tube 31 to move in the direction of the skin expansion tube 2, and expands the expansion tube. The leather tube 2 pushes out the driving device 32 in the puncture needle main body 1 ; the length of the outer sheath tube 31 is greater than the length of the puncture needle main body 1 . Place the expanding skin tube 2 in the puncture needle main body 1. When the puncture needle is puncturing, the skin expanding tube 2 enters the patient's vein together with the puncture needle body 1. At this time, the drive screw 321 on the outer sheath assembly 3 is driven to connect to the patient's vein. The drive block 323 on the puncture needle main body 1 moves to the end of the outer sheath tube 31 away from the puncture needle, thereby driving the puncture needle main body 1 to move. Since the side surface of the puncture needle main body 1 is formed with a tear opening extending along the axis of the puncture needle main body 1 11. Therefore, during the movement of the puncture needle, under the action of the circular frustum-shaped connecting portion 311, the tear opening 11 is slowly stretched, so that the puncture needle can be pulled out along the outer sheath tube 31, and the skin expanding tube 2 Continue to stay in the vein. When the skin expanding tube 2 is completely separated from the puncture needle, the puncture needle can be removed from the outer sheath tube 31, and then the PICC tube can be pierced through the outer sheath tube 31, along the skin expanding tube 2. Enter the vein, and after reaching the designated position, slowly withdraw the expanding skin tube 2, leaving only the PICC tube in the vein, thus completing the PICC tube placement. The pre-procedure work before PICC cannulation is reduced, and the pain of the patient is greatly reduced.

Preferably, the driving device 32 includes a driving screw 321 and a carrier 322 supporting the driving screw 321; the carrier 322 includes a first connection fixedly connected to the end of the outer sheath 31 away from the puncture needle body 1 and perpendicular to the outer sheath 31 A rod 3221, and a second connecting rod 3222 perpendicular to the first connecting rod 3221 and fixedly connected to the end of the first connecting rod 3221. By driving the screw 321, when the puncture needle body 1 is pulled out, the puncture needle can move stably along a straight line, so as to prevent injury to the patient.

Preferably, the first connecting rod 3221 is provided with a first tube through hole penetrating the first connecting rod 3221 and communicating with the outer sheath tube 31 , and a first tube through hole 32211 parallel to the first through hole 3221 and for the driving screw 321 to pass through. Two through holes 32212; the second connecting rod 3222 has a sliding rail 32221 arranged along the length direction of the second connecting rod 3222. The PICC tube can be inserted through the first through hole 32211, the screw rod can be inserted through the second through hole 32212, and the sliding rail 32221 on the second connecting rod 3222 can make the driving block 323 more stable when sliding.

Preferably, the driving device 32 further includes a driving block 323 that is detachably connected to the puncture needle body 1; . Through the cooperation between the sliding groove 3232 and the sliding rail 32221, the driving block 323 is more stable when sliding. Through the cooperation between the threaded hole 3231 and the driving compass, when the driving screw 321 is rotating, the driving block 323 can move along the driving screw 321. , thereby driving the puncture needle body 1 to move.

Preferably, the drive screw 321 is provided with a drive handle 3211 that can be operated by the operator. By driving the handle 3211, the operator can save more effort.

Preferably, one end of the outer sheath tube 31 close to the puncture needle body 1 is provided with a connecting portion 311 that is detachably connected to the skin expanding tube 2 . The expanded skin tube 2 is detachably mounted on the connecting portion 311, which is more convenient to use.

Preferably, the connecting portion 311 includes a protruding section 3111 extending into the puncture needle body 1 and an outer retaining section 3112 located outside the puncture needle main body 1 . The connection between the puncture needle body 1 and the outer sheath tube 31 can be made more stable by the extending section 3111 of the connecting portion 311 .

Preferably, the outer retention section 3112 is in the shape of a truncated cone. When the puncture needle main body 1 is withdrawing from the vein, the truncated outer segment 3112 makes it easier for the puncture needle main body 1 to open, so that the puncture needle main body 1 is more easily withdrawn.

Preferably, the end of the extending section 3111 is formed with an annular snap-fit groove 31111 for snap-fit with the expanding skin tube 2 . The expanding skin tube 2 is snapped into the annular snap groove 31111, so that the skin expanding tube 2 can be pushed into the vein more easily.

Preferably, the side surface of the outer sheath tube 31 is provided with a hand-held portion 312 for the operator to hold; the hand-held portion 312 is located above the connection portion 311 and is on the same side as the tear opening 11 . The outer sheath assembly 3 is held and stabilized by the handle portion 312 . In addition, the puncture needle body 1 can be withdrawn along the outer sheath tube 31 only when the handle portion 312 and the tear opening 11 are on the same side.

Preferably, the handle portion 312 has a bottom surface and a top surface, and a first side surface and a second side surface connecting the bottom surface and the top surface, and the area of the bottom surface is smaller than that of the top surface. When the area of the bottom surface is smaller than that of the top surface, the tear opening 11 can easily pass through the handle portion 312 .

Preferably, the puncture needle body 1 is provided with a connecting piece 12 detachably connected to the driving block 323 ; the driving block 323 is provided with a connecting groove 3233 into which the connecting piece 12 can be inserted. The connecting piece 12 is inserted into the connecting groove 3233 of the driving block 323 , and the puncture needle body 1 is driven to move by the driving block 323 .

Preferably, a pre-inlet 111 is formed at one end of the tear opening 11 close to the outer retention section 3112 , and the opening width of the pre-inlet 111 is larger than the opening width of the tear opening 11 . The opening width of the pre-inlet 111 is greater than the opening width of the tear opening 11 , so that the puncture needle body 1 can pass through the outer sheath tube 31 more easily.

Preferably, the inner wall of the puncture needle body 1 is covered with lubricant. The skin expansion tube 2 can be more easily separated from the puncture needle body 1 by the lubricant, which prevents the skin expansion tube 2 from being carried out of the vein by the puncture needle body 1. In addition, the lubricant is a mixture of normal saline, dexamethasone and lidocaine liquid.

The present invention also provides a puncturing method, comprising the following steps:

(1) pierce the skin expansion tube 2 into the vein along with the puncture needle body 1;

(2) withdraw the main body 1 of the puncture needle from the vein, and keep the expanding skin tube 2 in the vein;

(3) Passing the PICC tube through the outer sheath tube 31 and entering the vein along the skin expanding tube 2 to reach the designated position;

(4) withdraw the expanded skin tube 2 from the vein;

(5) Pull out the guide wire in the PICC tube;

(6) Reserve a section of PICC tube outside, and cut off the excess PICC tube;

(7) Put the decompression sleeve on the PICC pipe;

(8) Connect the PICC tube to the metal handle of the extension tube and snap it to the decompression sleeve.

In the above puncture method, the expanding skin tube 2 is pre-installed in the puncture needle main body 1, so that the skin expanding tube 2 directly enters the vein along with the puncture needle, which reduces the steps of inserting the guide wire and then inserting the skin expanding tube 2, and reduces the operation process. , alleviate the suffering of patients.

Preferably, in step (2), the main body 1 of the puncture needle is pulled out of the vein along the outer sheath tube 31 by driving the screw 321, and at the same time, the expanding tube 2 is continuously extended into the vein. By driving the screw 321, the puncture needle main body 1 and the outer sheath tube 31 are moved toward each other, and the puncture needle main body 1 is pulled out while the skin expanding tube 2 continues to extend into the vein.

Preferably, the length of the PICC tube reserved in step (6) is 5 cm. The reserved 5 cm PICC tube can be more convenient for the subsequent operation of the decompression sleeve and the installation of the extension tube, and will not hinder the patient's later movements.

The above-mentioned embodiments and drawings do not limit the product form and style of the present invention, and any appropriate changes or modifications made by those of ordinary skill in the art should be regarded as not departing from the scope of the present invention.

Claims (10)

1. A PICC puncture device comprises a puncture needle main body, a skin expanding tube and an outer sheath component; the method is characterized in that: the skin expanding tube is positioned in the puncture needle main body; a tearing opening extending along the axial direction of the puncture needle main body is formed on the side surface of the puncture needle main body; the outer sheath assembly comprises an outer sheath tube which is detachably connected with the skin expanding tube and a driving device which drives the outer sheath tube to move towards the skin expanding tube and pushes the skin expanding tube out of the puncture needle main body; the length of the sheath tube is larger than that of the puncture needle main body.

2. The PICC puncturing device of claim 1, wherein: the driving device comprises a driving screw rod and a bearing frame for bearing the driving screw rod; the bearing frame comprises a first connecting rod which is fixedly connected with one end of the sheath tube far away from the puncture needle main body and is vertical to the sheath tube, and a second connecting rod which is vertical to the first connecting rod and is fixedly connected with the end part of the first connecting rod.

3. The PICC puncturing device of claim 2, wherein: the first connecting rod is provided with a first tube through hole which penetrates through the first connecting rod and is communicated with the outer sheath tube, and a second through hole which is parallel to the first through hole and is used for the driving screw to pass through; the second connecting rod is provided with a sliding rail arranged along the length direction of the second connecting rod.

4. The PICC puncturing device of claim 3, wherein: the driving device also comprises a driving block which is detachably connected with the puncture needle main body; the driving block is provided with a sliding groove matched with the sliding rail and a threaded hole matched with the driving screw rod.

5. The PICC puncturing device of claim 4, wherein: and a driving handle which can be operated by an operator is arranged on the driving screw rod.

6. The PICC puncturing device of claim 5, wherein: one end of the outer sheath tube close to the puncture needle main body is provided with a connecting part which is detachably connected with the skin expanding tube.

7. The PICC puncturing device of claim 6, wherein: the connecting part comprises an extending section extending into the puncture needle main body and an outer remaining section positioned outside the puncture needle main body, and the outer diameter of the extending section is smaller than the inner diameter of the puncture needle main body.

8. The PICC puncturing device of claim 7, wherein: the outer remaining section is in a circular truncated cone shape.

9. The PICC puncturing device of claim 8, wherein: the end of the stretching section is provided with an annular clamping groove clamped with the skin expanding tube.

10. The PICC puncturing device of claim 9, wherein: a hand-held part which can be held by an operator is arranged on the side surface of the outer sheath tube; the handheld part is located connecting portion top and with the tear-off mouth is in same side.

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