CN111588966B

CN111588966B - Surgical catheter cutting device

Info

Publication number: CN111588966B
Application number: CN202010517564.8A
Authority: CN
Inventors: 张锦华
Original assignee: Affiliated Sir Run Run Shaw Hospital of School of Medicine Zhejiang University
Current assignee: Affiliated Sir Run Run Shaw Hospital of School of Medicine Zhejiang University
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2023-02-24
Anticipated expiration: 2040-06-09
Also published as: CN111588966A

Abstract

The invention relates to the technical field of medical instruments and discloses a surgical catheter cutting device, which comprises a clamping structure for fixing a catheter; the supporting disk is fixedly connected with the clamping structure, a through hole is formed in the supporting disk, a ring groove is further formed in the supporting disk, and the ring groove is located on the outer side of the through hole; the tool apron slides along the annular groove, and an installation groove is formed in the tool apron; the blade is arranged on the cutter holder and extends into the mounting groove; the connector is fixedly connected with the blade and is slidably connected with the tool apron and positioned in the mounting groove; a spring sleeved on the connector; stretch into in the mounting groove to support the first double-screw bolt of holding with the connector, the pipe passes the through-hole, and clamping structure fixes pipe and seal wire, and relative blade holder rotates first double-screw bolt, overcomes spring force and promotes the connector and slides in the mounting groove, then promotes the blade holder and slide a week along the annular, can accomplish the radial cutting of pipe fast, makes things convenient for the pipe to withdraw from the seal wire, obtains the effect that improves patient's operation security.

Description

Surgical catheter cutting device

Technical Field

The invention relates to the technical field of medical instruments, in particular to a surgical catheter cutting device

Background

When neurosurgery carried out brain operation, often can penetrate the pipe in focus department, the guide wire was worn to the intracavity of pipe and is carried out the drainage, and the pipe plays the effect of fixed guide wire, keeps away from patient's brain one end at the pipe and connects the high pressure instillation through the Y valve, guarantees that the pipe intracavity lasts forward and pours into normal saline to prevent the interior thrombus of pipe.

During the operation, one end of the catheter far away from the patient needs to be cut off, and then the catheter is withdrawn from the guide wire, so that an inflatable balloon or a thrombus removal stent can be conveniently guided to the lesion of the patient along the guide wire.

At present, the catheter is cut off by holding an art knife or a scalpel, and the problems that the cutting force of an operator is difficult to control and iatrogenic injury is easily caused to a patient exist.

Disclosure of Invention

In view of the above, the present invention is to provide a surgical catheter cutting device, which can precisely control the cutting depth, reduce the pulling of the guide wire and the catheter, and improve the surgical safety of the patient when cutting the surgical catheter.

The invention solves the technical problems by the following technical means: a surgical catheter cutting device comprising a clamping arrangement for securing a catheter; the supporting disc is fixedly connected with the clamping structure, a through hole is formed in the supporting disc, an annular groove is further formed in the supporting disc, and the annular groove is located on the outer side of the through hole; the tool apron slides along the annular groove, and an installation groove is formed in the tool apron; the blade is arranged on the tool apron and extends into the mounting groove; the connector is fixedly connected with the blade and is slidably connected with the tool apron and positioned in the mounting groove; the spring is sleeved on the connector; and the first stud extends into the mounting groove and abuts against the connector.

Furthermore, the clamping structure comprises a supporting plate, two arc-shaped plates, two abutting plates, a connecting rod and a second stud, wherein the supporting plate is fixedly connected with the supporting plate and is positioned on one side, away from the tool apron, of the supporting plate, the two arc-shaped plates are hinged to the two ends of the supporting plate respectively, the abutting plates are positioned on the inner sides of the two arc-shaped plates, at least one connecting rod is hinged to each arc-shaped plate, one end, away from the arc-shaped plates, of the connecting rod is hinged to the two ends of the abutting plates respectively, one end of the second stud is fixedly connected with the abutting plates, and the other end of the second stud penetrates through the supporting plate and is in threaded connection with the supporting plate.

Furthermore, a rectangular groove is formed in the axial direction of the mounting groove, and the connector is located in the rectangular groove.

Furthermore, a handle is fixedly connected to the tool apron and located on one side, away from the supporting plate, of the tool apron.

Furthermore, the number of the blades is two, the two blades are fixedly connected with the connector, the two blades are arranged in parallel relatively, the tool apron is connected with a longitudinal cutter in a sliding mode, and the longitudinal cutter is located between the two blades and is arranged perpendicular to the two blades relatively.

Furthermore, the blade is Y-shaped, the outer side of the blade is a blade back, and the inner side of the blade is a blade point.

The blade through the Y font moves from the top down, and the blade inserts the both sides of pipe simultaneously, then only need rotate half a circle blade alright accomplish the circular cutting to the pipe, has improved the cutting efficiency to the pipe.

Furthermore, an elastic layer is bonded on the outer surface of the blade.

When the blade is used for cutting, the catheter generates resistance to the blade, the blade causes the elastic layer to generate shearing deformation, the elastic layer generates elastic force opposite to the deformation direction, the effect of reducing vibration generated when the blade is used for cutting is achieved, and then the noise quantity transmitted to the pathological change part of a patient through the guide wire when the catheter is cut is relieved.

Compared with the prior art, the invention has the following beneficial effects:

1. the catheter passes through the through hole, and the catheter and the guide wire are fixed by the clamping structure, so that the situation that one end close to the head of a patient pulls the lesion part due to cutting is avoided. First double-screw bolt is rotated to the relative blade holder, overcomes spring force and promotes the connector and slide in the mounting groove, and then the length that the blade stretches out the blade holder for the degree of depth that the blade inserted the pipe equals the thickness of pipe, then promotes the blade holder and slides a week along the annular, can accomplish the radial cutting of pipe fast, makes things convenient for the pipe to withdraw from on the seal wire, obtains the effect that improves patient's operation security.

2. The cutting thickness of the blade is controlled in a micro-scale manner by controlling the rotation of the first stud, so that the damage to the outer coating of the guide wire is avoided, and the effect of improving the operation safety of a patient is achieved.

3. When cutting, the one end that the pipe is close to patient's head is located between two arcs, rotates the second double-screw bolt, promotes to support the surface of holding board and pipe and support and hold, and two arcs press from both sides tightly inwards under the effect of pull rod, realize the fixed to pipe and seal wire, avoid seal wire and pipe to drag patient's pathological change department when the cutting to realized damming to pipe cutting department, avoided patient's blood to flow from pipe cutting department.

Drawings

FIG. 1 is a schematic view of the cutting apparatus of the present invention;

FIG. 2 is a schematic bottom view of the cutting device of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2A;

FIG. 4 is a cross-sectional view of a tool holder of the present invention;

FIG. 5 is a schematic structural view of the installation groove of the present invention;

FIG. 6 is a cross-sectional view of a blade of the present invention;

wherein: 100-surgical catheter cutting device, 10-clamping structure, 11-support plate, 12-arc plate, 13-abutting plate, 14-connecting rod, 15-second stud, 20-support plate, 21-through hole, 22-ring groove, 30-tool apron, 31-installation groove, 32-rectangular groove, 40-blade, 41-first transverse knife, 42-second transverse knife, 50-connector, 60-spring, 70-first stud, 80-handle, 90-longitudinal knife and 110-elastic layer.

Detailed Description

The following description of the embodiments of the present invention is provided by way of specific examples, and those skilled in the art will appreciate the advantages and utilities of the present invention from the disclosure herein. It should be noted that the drawings provided in the following embodiments are only for illustrative purposes, are schematic drawings rather than actual drawings, and are not to be construed as limiting the invention, and in order to better illustrate the embodiments of the invention, some components in the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and their descriptions may be omitted.

In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is merely for convenience of description and simplicity of description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings for the above applications according to specific situations.

As shown in fig. 1 to 5, a surgical catheter cutting device 100 for cutting a neurosurgical catheter comprises a holding structure 10 for holding an end of the catheter close to a head of a patient;

specifically, the clamping structure 10 includes a supporting plate 11, an arc-shaped plate 12, a connecting rod 14, a holding plate 13 and a second stud 15, and the supporting plate 11 is located on the outer side of the conduit. The number of the arc-shaped plates 12 is two, and the two arc-shaped plates 12 are respectively hinged with two ends of the supporting plate 11. The number of the connecting rods 14 is at least two, four are exemplified here, one end of each of the four connecting rods 14 is hinged to the waist of each of the two arc-shaped plates 12, four corners of each of the abutting plates 13 are hinged to the other ends of the four connecting rods 14, one end of each of the second studs 15 is welded to the middle of the abutting plate 13, the other end of each of the second studs 15 penetrates through the supporting plate 11, the second studs 15 are in threaded connection with the supporting plate 11, and a nut is integrally formed at one end of each of the second studs 15 extending out of the supporting plate 11.

A supporting plate 20 is fixedly connected to one side of the supporting plate 11 far away from the head of the patient, a through hole 21 for the conduit to pass through is formed in the supporting plate 20, a ring groove 22 is further formed in the supporting plate 20, and the cross section of the ring groove 22 is in a dovetail shape. The tool apron 30 is clamped in the ring groove 22, the tool apron 30 is L-shaped, one end of the tool apron 30 slides along the circumferential direction of the sliding groove, the other end of the tool apron 30 points to the axis of the guide pipe, the mounting groove 31 is formed in the direction of the guide pipe pointed by the tool apron 30, the rectangular groove 32 is formed in the axis direction of the mounting groove 31, the connector 50 is connected in the rectangular groove 32 in a sliding mode, internal threads are formed in the inner wall of the mounting groove 31, the mounting groove 31 is connected with the first stud 70 in an internal thread mode, and the first stud 70 is abutted to the connector 50. The spring 60 is fixedly sleeved outside the connector 50, the blade 40 is fixedly connected to one end, far away from the first stud 70, of the connector 50, under the elastic force of the spring 60, the blade 40 is contracted in the mounting groove 31, when the connector is required to be used, the first stud 70 is screwed inwards, the first stud 70 overcomes the elastic force of the spring 60, the connector 50 is pushed to slide along the rectangular groove 32, and the purpose of pushing the blade 40 out of the mounting groove 31 is achieved.

Specifically, the number of blades 40 is two, including first horizontal sword 41 and second horizontal sword 42, first horizontal sword 41 and second horizontal sword 42 all with connector 50 fixed connection, first horizontal sword 41 and the relative parallel arrangement of second horizontal sword 42, sliding connection has slitting knife 90 on the blade holder 30, slitting knife 90 is located between first horizontal sword 41 and the second horizontal sword 42, and set up with first horizontal sword 41 relatively perpendicular, slitting knife 90 adopts spring 60 circle to fix on blade holder 30, avoid it to slide at will, with be fixed with the button on slitting knife 90, the button is located the outside of blade holder 30. The first stud 70 is rotated to adjust the cutting depth of the first transverse knife 41 and the second transverse knife 42 into the pipe, and then the knife holder 30 is rotated along the annular groove 22 for one circle to cut the pipe into three sections. The longitudinal cutting knife 90 slides towards the direction of the catheter axis, the middle section of the catheter is cut axially and then is cut off, the outer surface of the guide wire is exposed, the guide wire can be clamped conveniently when the section of the catheter far away from one end of the head of the patient is withdrawn from the guide wire, friction force generated by the guide wire when the catheter is withdrawn from the guide wire is prevented from being transmitted to the lesion position of the patient, and the effect of improving the operation safety of the patient is achieved.

Preferably, a handle 80 is fixedly connected to the tool holder 30, and the handle 80 is located on a side of the tool holder 30 away from the support plate 20. The handle 80 increases the contact area with the operator's hand, facilitating the rotation of the blade holder 30 along the annular groove 22 during the radial cutting of the catheter.

As shown in fig. 6, the blade 40 is Y-shaped, and the outer side of the blade 40 is a back and the inner side is a tip. The Y-shaped cutter can meet the requirements of cutting surgical catheters with different diameters, the inner side blade of the blade 40 is inserted into the catheter, and then the circular cutting of the catheter can be completed by rotating for half a circle under the driving of the cutter holder 30.

Preferably, the elastic layer 110 is bonded to the outer surface of the blade 40, the elastic layer 110 is made of damping rubber and is bonded to the outer surface of the blade 40, when the catheter is used, vibration of the blade 40 caused by catheter resistance forces the elastic layer 110 to generate deformation mainly based on shearing, and the elastic layer 110 generates elastic force opposite to the deformation direction under its own damping characteristic to absorb energy of vibration of the blade 40, so that influence of vibration of the blade 40 on a lesion of a patient is effectively reduced.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims. The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.

Claims

1. A surgical catheter cutting device, comprising: comprises a clamping structure for fixing the conduit;

the supporting disc is fixedly connected with the clamping structure, a through hole is formed in the supporting disc, an annular groove is further formed in the supporting disc, and the annular groove is located on one side, away from the clamping structure, of the supporting disc;

the tool apron slides along the annular groove, and an installation groove is formed in the tool apron;

the blade is arranged on the tool apron and extends into the mounting groove;

the connector is fixedly connected with the blade and is slidably connected with the cutter holder and positioned in the mounting groove;

and a spring sleeved on the connector;

and a first stud extending into the mounting groove and abutting against the connector,

the quantity of blade is two, two the blade all with connector fixed connection, two relative parallel arrangement between the blade, sliding connection has the slitting knife on the blade holder, the slitting knife is located two between the blade to with two the blade is relative perpendicular setting.

2. The surgical catheter cutting device of claim 1, wherein: the clamping structure comprises a supporting plate, two arc-shaped plates, two abutting plates, connecting rods and a second stud, wherein the supporting plate is fixedly connected with the supporting plate and is positioned on one side, away from the tool apron, of the supporting plate, the two arc-shaped plates are hinged to the two ends of the supporting plate respectively, the abutting plates are positioned on the inner sides of the two arc-shaped plates, at least one connecting rod is hinged to each arc-shaped plate, one end, away from the arc-shaped plates, of each connecting rod is hinged to the two ends of the abutting plates respectively, one end of the second stud is fixedly connected with the abutting plates, and the other end of the second stud penetrates through the supporting plate and is in threaded connection with the supporting plate.

3. The surgical catheter cutting device of claim 2, wherein: the rectangular channel has been seted up to the axial direction of mounting groove, the connector is located the rectangular channel is interior.

4. The surgical catheter cutting device of claim 3, wherein: the knife holder is fixedly connected with a handle, and the handle is positioned on one side, far away from the supporting plate, of the knife holder.

5. The surgical catheter cutting device of claim 4, wherein: the blade is Y-shaped, the outer side of the blade is a blade back, and the inner side of the blade is a blade point.

6. The surgical catheter cutting device of claim 5, wherein: the outer surface of the blade is bonded with an elastic layer.