CN110755138A

CN110755138A - Multi-cavity tearable radiography sheath tube

Info

Publication number: CN110755138A
Application number: CN201911141522.2A
Authority: CN
Inventors: 邱筱炜; 林彩霞
Original assignee: Ruinjin Hospital Affiliated to Shanghai Jiaotong University School of Medicine Co Ltd Luwan Branch
Current assignee: Ruinjin Hospital Affiliated to Shanghai Jiaotong University School of Medicine Co Ltd Luwan Branch
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-02-07

Abstract

The invention relates to the technical field of radiography instruments, in particular to a multi-cavity tearable radiography sheath tube, wherein at least two tube cavities are separated from the sheath tube through an inner cavity spacer, the tail ends of the tube cavities are mutually communicated, a notch is arranged at the tail end of the sheath tube so as to facilitate the sheath tube to be torn, and a sealing ring is connected at the notch and seals the tail end of the sheath tube. Compared with the prior art, the invention has the advantages that: the sheath tube is internally provided with a multi-cavity structure, so that a plurality of catheters can be conveniently and simultaneously inserted, and the tail end of the sheath tube is provided with a sealing ring, so that the blood can be effectively prevented from overflowing and air can be effectively prevented from entering the blood vessel in the operation process; connect the inner chamber spacer through the draw-in groove and separate the inner chamber of sheath pipe, sheath pipe wall thickness reduces because of the draw-in groove simultaneously, therefore makes the sheath pipe change and tears, and the draw-in groove end is equipped with the breach and as sealing washer installation setpoint, also regards as tearing the initial position simultaneously to sharp-pointed breach structure makes things convenient for the sheath pipe to tear, has realized convenient, effectual sheath pipe and has torn the operation.

Description

Multi-cavity tearable radiography sheath tube

Technical Field

The invention relates to the technical field of radiography instruments, in particular to a multi-cavity tearable radiography sheath tube.

Background

When the electrode lead of the permanent cardiac pacemaker is implanted clinically, the sheath tube needs to be firstly sent into the vein along the guide steel wire to establish an operation channel, and then the electrode lead is sent into the heart cavity along the sheath tube. In order to reduce the damage to the blood vessel wall and reduce the blood loss, a sheath with a relatively small tube diameter is usually selected in the operation, and the inner diameter is subject to the smooth passing of the electrode catheter. A tearaway sheath must then be used during the procedure to withdraw the sheath from the electrode tail.

The tearable sheath which is widely used in clinic at present is improved from the traditional vein sheath, and the main defects are as follows: 1. the sheath tail end does not have the sealing washer, when sending into the sheath and sending into pacing electrode along the sheath along the guide wire, easily because of the patient when breathing in vein internal negative pressure and introduce the air from the sheath, cause gaseous embolism. 2. The end of the sheath tube is not provided with an injection joint, so that the suction or injection function is not realized. After the sheath is sent into the vein, air bubbles or thrombus possibly existing in the sheath cannot be sucked, anticoagulant (such as heparin saline) and other treatment medicines cannot be injected into the sheath, and more patients with the operation are old and have high possibility of vascular variation, and the traditional sheath cannot be used for injecting contrast into the sheath, so that real-time angiography is realized. 3. Because the tail end of the sheath tube has no sealing function, after the pacing electrode lead is sent into the pacing electrode lead through the sheath tube, the sheath tube must be quickly withdrawn along the lead, otherwise, air is easily sucked through the tail end of the sheath tube, and continuous or large amount of blood loss is caused. 4. Since the sheath must be withdrawn and torn away before the electrode lead is properly positioned, the sheath cannot be retained for positioning the electrode lead, and the electrode lead cannot be replaced through the sheath. Once the lead is positioned in failure, such as when the electrode lead needs to be replaced, the blood vessel must be punctured again, and the operation is started from the beginning. 5. The traditional sheath is of a single-cavity structure, only one electrode can be placed in a single time, the existing implanted pacemaker is mostly in a double-cavity pacing mode, and 2 electrode leads need to be placed in the operation. In the conventional operation, after one electrode is placed, the sheath tube is torn and taken out, the new sheath tube is punctured and inserted again, and the operation is repeated to place a second electrode, so that the process is complicated, the possibility of secondary puncture failure exists, and the risk of occurrence of complications in the operation (such as pneumothorax, hemopneumothorax and the like) is increased.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides a multi-cavity tearable radiography sheath tube, wherein a plurality of electrode leads can be implanted in a single puncture without repeated puncture operation.

In order to achieve the purpose, the multi-cavity tearable contrast sheath comprises an inner cavity spacer and a sealing ring, wherein at least two lumens are separated from the sheath through the inner cavity spacer, the tail ends of the lumens are communicated with each other, a notch is formed in the tail end of the sheath so that the sheath can be torn, and the sealing ring is connected to the notch and seals the tail end of the sheath.

The invention also has the following preferable technical scheme:

the sheath intraductal draw-in groove that is equipped with of be used for the joint the inner chamber spacer, the draw-in groove do not extend to the end of sheath pipe, just the end of sheath pipe correspond to the draw-in groove be equipped with the breach.

The notch is provided with a vertex angle pointing to the front end of the sheath tube.

The sheath pipe be close to the terminal department correspond to the breach be provided with the handle that links to each other with the sheath pipe respectively, the handle inboard be equipped with around symmetrical invagination portion so that tear the pipe sheath application of force.

The sealing ring is connected to the notch through a buckle.

The multi-cavity tearable contrast sheath tube further comprises at least one core rod, the core rod is arranged in the tube cavity and used for being matched with the guide wire, a guide hole used for being matched with the guide wire is formed in the core rod, and the front end of the core rod is conical.

The tail end of the tube cavity is connected with an injection connector, and the injection connector is provided with an opening and closing valve.

The front end of the sheath tube is provided with a slope inclining forwards and backwards.

The cross section of the sheath tube gradually transits from an ellipse to a circle from the front end to the rear end.

Sheath intraductal front and back symmetry be equipped with two draw-in grooves for the joint in inner chamber spacer's front and back both sides, interior spacer be in the sheath intraductal two lumens of separating, the draw-in groove do not extend to the end of sheath pipe to make the end of two lumens communicate each other the end of sheath pipe correspond to two draw-in grooves be equipped with two the breach, and the sheath pipe is close to terminal outside and corresponds to two the breach be provided with two handles that link to each other with the sheath pipe respectively.

Compared with the prior art, the invention has simple and feasible combination structure, easy installation and disassembly and the advantages that: the multi-cavity tearable radiography sheath tube is provided, the interior of the sheath tube is of a multi-cavity structure, a plurality of guide tubes can be conveniently inserted at the same time, and the tail end of the sheath tube is provided with the sealing ring, so that blood overflow and air entering into blood vessels in the operation process can be effectively avoided; preferably, the clamping groove is connected with the inner cavity spacer to separate the inner cavity of the sheath tube, meanwhile, the wall thickness of the sheath tube is reduced due to the clamping groove, so that the sheath tube is easier to tear, a notch is arranged at the tail end of the clamping groove and serves as a sealing ring mounting positioning point, and meanwhile, the notch serves as a tearing starting position, so that the sheath tube is convenient to tear due to a sharp notch structure, and convenient and effective sheath tube tearing operation is realized; and the front end of the sheath tube is in an oblique cone shape, and the front tip and the rear wide knot of the head can realize better guiding effect and facilitate guiding and inserting.

Drawings

FIG. 1 is a schematic view of the assembly of the multi-lumen tearable contrast sheath of the present invention.

FIG. 2 is a schematic top sectional view of the multi-lumen tearable contrast sheath of the present invention.

FIG. 3 is a schematic view of the front end portion of the multi-lumen tearable contrast sheath of the present invention.

FIG. 4 is a cross-sectional view of the front end of the multi-lumen tearable contrast sheath of the present invention.

FIG. 5 is a partial schematic view of the distal end of a multi-lumen tearable contrast sheath of the present invention.

FIG. 6 is a schematic view of an assembly structure of the handle, the sealing ring and the buckle.

Fig. 7 is a schematic view of guiding a multi-lumen tearable contrast sheath through a guide wire.

Fig. 8 is a schematic view a of adjusting the insertion angle of the sheath.

Fig. 9 is a schematic view b of adjusting the insertion angle of the sheath.

Fig. 10 is a schematic view of electrode lead insertion.

FIG. 11 is a schematic view a of sheath tear.

Fig. 12 is a schematic view b of sheath tearing.

Fig. 13 is a schematic view a of the connection of the handle to the sheath.

Fig. 14 is a schematic view b of the connection of the handle to the sheath.

Fig. 15 is a schematic structural view of the buckle.

Fig. 16 is a schematic view of the structure when the buckle is opened.

In the figure: 1. the sheath tube 2, the injection joint 3, the handle 3a, the left handle 3b, the right handle 3c, the invagination portion 4, the buckle 5, the core rod 6, the inner cavity spacer 7, the sealing ring 7a, the left sealing ring 7b, the right sealing ring 8, the guide wire 9a, the electrode lead a 9b, the electrode lead b 10 and the injector.

Detailed Description

The construction and principles of such a device will be apparent to those skilled in the art from the following further description of the invention taken in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and fig. 2, the present embodiment provides a multi-cavity tearable contrast sheath, which mainly includes a sheath 1, an injection joint 2, a handle 3, a buckle 4, a core rod 5, an inner cavity spacer 6, and a seal ring 7, wherein the inner cavity spacer 6 and the core rod 5 are disposed in an inner cavity of the sheath 1, the handle 3, the seal ring 7, and the injection joint 2 are disposed at a tail end of the sheath 1, and the buckle 4 is disposed outside the seal ring 7; in the present embodiment, with reference to fig. 4, the inner cavity spacer 6 is located in the middle of the sheath tube 1, two clamping grooves symmetrically arranged in the middle of the sheath tube 1 in the front and back directions are respectively clamped to the front and back sides of the inner cavity spacer 6, the inner cavity of the sheath tube 1 is divided into a left lumen and a right lumen, and the left and right side wall surfaces of the inner cavity spacer 6 are arc surfaces adapted to the two lumens of the sheath tube 1, so that the cross sections of the two divided lumens are circular, and the clamping grooves do not extend to the end of the sheath tube 1, so that the ends of the left and right lumens are communicated with each other, and during injection, both lumens can carry out liquid delivery, thereby reducing delivery pressure and improving injection effect; the tail end of the sheath tube 1 is provided with two handles 3, and the two handles 3 are firmly connected to the two sides of the tail end of the sheath tube 1; the tail end of the sheath tube 1 is also provided with two sealing rings 7, the sealing rings 7 are sleeved with buckles 4, the two sealing rings 7 are folded through the buckles 4 and are fixed at the tail end of the sheath tube 1; the sheath tube 1 is also provided with a channel communicated to the inner cavity of the sheath tube near the tail end and used for being connected to the injection connector 2 through a pipeline; the core rod 5 passes through the inner insertion hole of the sealing ring 7 and extends out of the front end of the sheath 1 after passing through any chamber.

In a preferred embodiment, referring to fig. 3, the front end of the sheath 1 has a slope inclined from back to front, i.e. a slope cone shape, and the head has a structure that is sharp at the front and wide at the back, so as to achieve a better guiding effect and facilitate the guiding insertion.

In a preferred embodiment, referring to fig. 5, two notches are further provided at the end of the sheath tube 1 corresponding to the positions of the two slots symmetrically provided in the sheath tube 1, and the central lines of the notches and the central lines of the slots are on the same straight line. The clamping groove is provided with a bottom plane and two side wall planes, the two side wall planes can constrain the inner cavity spacer 6, so that the inner cavity spacer 6 is stably positioned in the middle of the sheath tube 1, and the wall thickness of the sheath tube 1 is reduced due to the clamping groove, so that the sheath tube 1 is easier to tear; the notch at the tail end can be used as an installation positioning point of the sealing ring 7 and also used as a tearing starting position, and the notch is provided with a vertex angle pointing to the front end of the sheath tube 1, so that the sheath tube 1 can be conveniently torn by a sharp notch structure. In addition, with reference to fig. 13 and 14, two handles 3 are further provided at positions corresponding to the two notches, so that left and right separation can be conveniently achieved in the tearing process, in this embodiment, each handle 3 includes a left handle 3a and a right handle 3b, the proximal ends of the left handle 3a and the right handle 3b are respectively provided with a circular arc-shaped groove capable of being attached to the outer wall of the sheath tube 1, and then the left handle 3a and the right handle 3b are attached to the outer wall of the sheath tube 1 by glue, while the left handle 3a and the right handle 3b are not fixedly attached to each other, so that mutual interference can be avoided in the tearing process, and the sheath tubes 1 of the respective bonded parts are separately driven to be torn and separated; in addition, with reference to fig. 6, the inner sides of the left handle 3a and the right handle 3b are both provided with two inward recessed portions 3c which are symmetrical in the front-back direction and can be used as finger placement positions during tearing, so as to facilitate force application during tearing.

In a preferred embodiment, the cross section of the sheath 1 gradually changes from an oval shape to a circular shape from the front end to the rear end, i.e. the front cross section of the sheath 1 is designed to be oblate, and the rear cross section is designed to be circular. The oval design of the front part reduces the cross section area of the catheter, reduces the expansion of blood vessels and simultaneously ensures that the product can easily pass through narrow gaps; and the circular design structure at the rear part can facilitate the installation of all parts at the tail part.

In a preferred embodiment, two sealing rings 7 are symmetrically installed at the end of the sheath tube 1 corresponding to the positions of the two lumens, each sealing ring 7 is semicircular, and after being spliced with each other, a circular sealing ring 7 corresponding to the circular cross section of the end of the sheath tube 1 can be formed to block the rear end of the sheath tube 1, and two slots are respectively arranged at the positions corresponding to the two lumens of the sheath tube 1, so that the catheter can be inserted into and pulled out from the position. Because the sealing ring 7 material has certain elasticity, when the catheter is drawn out, the slotting position of the sealing ring 7 can rebound rapidly to block the inner cavity to form a sealing effect, thereby effectively avoiding blood overflow and air entering the blood vessel in the operation process.

In a preferred embodiment, the injection connector 2 is further provided with an open/close valve, which is normally closed and when opened, can provide for the extraction of air bubbles and blood from the lumen of the sheath 1 and the injection of contrast medium. The injection connector 2 can be connected with the injector 10 through a standard luer connector, can be directly installed in an operation and performs injection operation, and can ensure enough firmness and tightness.

In a preferred embodiment, referring to fig. 3, the front end of the mandrel 5 is designed to be a tapered structure, and a guide hole is provided inside the mandrel 5 to facilitate the insertion of a guide wire and achieve a guide wire guiding function.

In a preferred embodiment, referring to fig. 15 and 16, the buckle 4 has a circular inner cavity adapted to the sealing ring 7, one end of the buckle 4 is provided with a connecting slot, and the other end of the buckle is correspondingly provided with a fastening point, so that the buckle 4 can be fastened by the cooperation of the fastening point and the connecting slot. And, in the circular inner chamber of buckle 4, can also set up a plurality of annular recesses in order to form the draw-in groove position to cooperate with the sealing washer 7 that sets up correspondingly and play better screens, locking effect, reduce the influence to sealing washer 7 when plug 5 takes out. In this embodiment, buckle 4 is through integrative injection moulding, and both ends are equipped with stuck point and connecting slot, and the interlude is the linkage segment that can warp completely, can be 4 ring package sealing washers 7 backs at the buckle, and it is fixed to lock the connection that the stuck point realized buckle 4 through connecting slot, and simultaneously after the art, can easily open buckle 4, realize dismantling.

Therefore, the embodiment provides a double-lumen tearable sheath, wherein an inner lumen spacer 6 is installed inside the sheath 1, so as to divide the interior of the sheath 1 into a double-lumen structure, thereby facilitating the insertion of two catheters at the same time; in addition, the structure is combined, can be separated and taken out, improves the tearable effect, and is convenient for the complete taking out of the torn sheath 1 under the state that two catheters are inserted. Of course, on the basis of the present embodiment, the double lumen can be adaptively modified to a triple or quadruple lumen or the remaining number of multi-lumen structures, etc., which can be realized by those skilled in the art.

Example 1

Fig. 1 and 2 show a double-channel tearable sheath, which comprises a sheath 1, an injection connector 2, a handle 3, a buckle 4, a core rod 5, an inner cavity spacer 6 and a sealing ring 7. As shown in fig. 3 and 4, an inner cavity spacer 6 is installed in the inner cavity of the sheath tube 1, and a clamping groove for limiting and fixing the inner cavity spacer 6 is formed in the inner cavity of the sheath tube 1, so that the inner cavity spacer 6 is firmly positioned in the middle of the sheath tube 1; the front end of the sheath tube 1 is in an oblique cone shape, the front end of a cone-shaped core rod 5 extends out of the tube cavity, and a guide hole is formed in the core rod 5; the inner cavity of the sheath tube 1 is in a double-cavity state, and the cross section is of an oblate structure, so that the cross section area is greatly reduced; as shown in fig. 5, the end of the sheath tube 1 is provided with two symmetrical notches, which not only can satisfy the positioning and installation of the sealing ring 7, but also can be used as the tearing start position of the sheath tube 1, so that the sheath tube 11 can be easily torn. As shown in fig. 6, the end of the sheath 11 is symmetrically provided with a left handle 33a and a right handle 33b, the left sealing ring 7a and the right sealing ring 7b are symmetrically arranged on the positions of the left handle 3a and the right handle 3b close to the handle 3, and finally the left sealing ring 7a and the right sealing ring 7b are fastened on the end by a buckle 4.

The following description of the pacemaker bipolar lead installation procedure is provided in conjunction with fig. 7-12:

1) the open/close valve of the injection connector 2 is set to an open state.

2) As shown in fig. 7, the front end of the core rod 5 at the front of the product is inserted into the end part exposed to the human body by the guide wire 8, and the product is inserted into the blood vessel by being guided by the guide wire 8.

3) As shown in fig. 8 and 9, in the process, when the position of the narrow part which can not pass through the narrow part is met, the angle of the sheath 1 needs to be properly adjusted to enable the narrow edge of the product to correspond to the narrow part, and then the narrow part passes through the narrow part.

4) After the puncture is completed, the guide wire 8 and the core rod 5 are taken out from the sheath tube 1.

5) An injector 10 containing a contrast medium is attached to the injection joint 2, and after evacuation, contrast injection is performed into a blood vessel to confirm the state of the blood vessel, and after confirmation, the injector 10 is removed.

6) The open and close valves on the injection connector 2 are closed to prevent the blood from flowing out continuously.

7) As shown in fig. 10, two electrode leads of the pacemaker are inserted into two lumens of the sheath 1, respectively, until the positioning is completed.

8) After the buckle 4 is removed, the sealing ring 7 is quickly removed.

9) As shown in fig. 11 and 12, the handles 3 are held by both hands, the sheath 1 is torn by applying force, and the lumen septum 6 is finally pulled out from between the two electrodes.

10) The pacemaker is fixed, and the whole implantation operation process is ended.

It should be emphasized that the present invention is described with the focus on the multi-lumen tearable contrast sheath 1, and the matched parts are only illustrated by way of example and are not intended to limit the present invention in the matching accessories; meanwhile, the embodiment is only an illustration of the structural product related to the invention in the operation and does not limit the application field of the invention.

Claims

1. The multi-cavity tearable contrast sheath is characterized by comprising an inner cavity spacer and a sealing ring, wherein at least two lumens are separated from the inner cavity spacer in the sheath, the tail ends of the lumens are communicated with each other, a notch is formed in the tail end of the sheath so that the sheath can be torn, and the sealing ring is connected to the notch and seals the tail end of the sheath.

2. The multi-lumen tearable angiographic sheath according to claim 1, wherein a notch is formed in the sheath for engaging with the lumen spacer, the notch does not extend to the distal end of the sheath, and the distal end of the sheath has the notch corresponding to the notch.

3. The multi-lumen tearable visualization sheath of claim 1 or 2, wherein the notch has a vertex pointing toward the front end of the sheath.

4. The multi-lumen tearable contrast sheath according to claim 1 or 2, wherein the sheath is provided with handles at the proximal ends thereof corresponding to the notches, the handles being respectively connected to the sheath, and the handles being provided with inward recessed portions symmetrically arranged in the front and rear directions inside the handles for applying force to tear the sheath.

5. The multi-lumen tearable visualization sheath of claim 1, wherein the sealing ring is connected to the notch by a snap fit.

6. The multi-lumen tearable imaging sheath according to claim 1, further comprising at least one core rod, wherein the core rod is disposed in the lumen for fitting with the guide wire, a guide hole for fitting with the guide wire is provided in the core rod, and a front end of the core rod is tapered.

7. The multi-lumen tearable contrast sheath of claim 1, wherein an injection connector is connected to an end of the lumen, and the injection connector has an open/close valve.

8. The multi-lumen tearable visualization sheath of claim 1, wherein the sheath has a forward end with a slope that slopes forward from the back.

9. The multi-lumen tearable visualization sheath of claim 1, wherein the sheath gradually transitions from elliptical to circular in cross-section from the front end to the back end.

10. The multi-lumen tearable contrast sheath according to claim 1, wherein two engaging grooves are symmetrically disposed in the sheath in a front-back direction for engaging with front and back sides of the lumen spacer, the lumen spacer separates two lumens in the sheath, the engaging grooves do not extend to the end of the sheath, so that the ends of the two lumens are connected to each other, two notches are disposed at the end of the sheath corresponding to the two engaging grooves, and two handles are disposed at the outer side of the sheath near the end corresponding to the two notches and respectively connected to the sheath.