CN211132605U

CN211132605U - Catheter sheath

Info

Publication number: CN211132605U
Application number: CN201920971711.1U
Authority: CN
Inventors: 柯明武; 夏晓群
Original assignee: Shenzhen Maiketian Life Science Co ltd
Current assignee: Shenzhen Maiketian Life Science Co ltd
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-07-31
Anticipated expiration: 2029-06-26

Abstract

The application discloses catheter sheath, including sheath pipe, sheath and fixed band. The sheath is fixedly connected with the sheath tube, a hollow channel is arranged in the sheath, and the hollow channel is communicated with the inside of the sheath tube. The outer peripheral surface of the sheath is also extended with a side lug, and the side lug is provided with a through fixing hole. The fixing band is provided with a plurality of adjusting holes at one end and lugs at the other end, and the fixing band is connected to the sheath through the matching of the fixing holes and the adjusting holes and the lugs, and is used for being worn on the wrist.

Description

Catheter sheath

Technical Field

The present application relates to medical sheaths, and more particularly to a sheath that is well secured to the wrist.

Background

When medical operations such as cardiovascular interventional therapy and angiography are performed, a catheter sheath needs to be introduced into a blood vessel of a patient by adopting a percutaneous puncture (Seldinger) technology, and then some diagnostic or therapeutic catheters, guide wires and the like are placed through the catheter sheath. If the sheath tube is not fixed after being placed in the sheath tube, the sheath tube is separated from the blood vessel in the repeated tube placing process, so that the operation is interrupted, a new sheath tube needs to be placed again, the operation time is delayed, unnecessary bleeding of a patient is caused, the work difficulty is increased for medical staff, and the operation cost is increased.

Patent CN109200432A provides a structure for fixing a catheter sheath with a fixing band. The sheath with the lug is sleeved on the catheter sheath, and two ends of the fixing band with the adjusting hole are fixed on the lug, so that the effect of fixing the catheter sheath on the wrist of a patient is achieved. However, the fixing method of the structure still has certain defects because the sheath is easily displaced in the process of buckling the adjusting hole of the fixing band with the lug, and the fixing sheath is easily separated from the blood vessel in the process.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a catheter sheath to solve the fixed not good problem of catheter sheath, specifically include following scheme:

the application provides a catheter sheath, including sheath pipe, sheath and fixed band. The sheath is fixedly connected with the sheath tube, a hollow channel is arranged in the sheath, and the hollow channel is communicated with the inside of the sheath tube. The outer peripheral surface of the sheath is also extended with a side lug, and the side lug is provided with a through fixing hole. The fixing band is provided with a plurality of adjusting holes at one end and lugs at the other end, and the fixing band is connected to the sheath through the matching of the fixing holes and the adjusting holes and the lugs, and is used for being worn on the wrist.

In one embodiment, the side ear is a flexible side ear, so that the sheath and the fixing band are flexibly connected.

In one embodiment, the lug comprises a fixing rod and a fixing cap, the fixing rod is connected between the fixing band and the fixing cap, one end of the fixing band close to the lug is a straight end, and one end of the fixing band close to the adjusting hole is an arc end.

In one embodiment, the fixing strap is a flexible fixing strap, the adjusting holes are through holes, and the fixing cap of the fixing strap passes through the fixing hole to be sleeved with the sheath and to surround the wrist so that one of the adjusting holes is sleeved with the lug, so that the fixing strap is annular and fixes the catheter sheath on the wrist.

In one embodiment, the size of the fixing cap is larger than the size of the fixing hole and the size of the adjusting hole, so that the fixing strap and the side lug are deformed, and the adjusting hole and the fixing hole penetrate through the fixing cap and are sleeved with the lug.

In one embodiment, the fixing band further comprises a plurality of connecting seams, the connecting seams are connected between the adjusting holes and conduct the adjacent adjusting holes, and the width of each connecting seam is smaller than the diameter of each adjusting hole.

In one embodiment, the fixing strap is a rigid fixing strap, one end of the fixing rod away from the fixing cap is a threaded end, the adjusting hole is a through hole and is provided with an internal thread matched with the threaded end, and the fixing rod penetrates through one of the fixing hole and the adjusting hole and is in threaded connection with the internal thread on the fixing strap to fix the catheter sheath on the wrist.

In an embodiment, the fixing strap is a flexible fixing strap, the adjusting hole is a blind hole capable of being fastened with the fixing cap, the fixing strap deforms, passes through the fixing hole through the lug to be sleeved with the side lug, and surrounds the wrist to enable one of the adjusting holes to be fastened with the lug, so that the fixing strap is annular and fixes the catheter sheath on the wrist.

In one embodiment, the fixing strap is a rigid fixing strap, one end of the fixing rod, which is far away from the fixing cap, is a magnetic end, the adjusting hole is provided with a positioning groove which is attracted with the magnetic end, and the lug is attracted with the adjusting hole through the magnetic end.

In one embodiment, the adjusting holes are blind holes capable of being buckled with the fixing cap, the magnetic ends penetrate through the fixing holes to be attracted with the positioning grooves, and the fixing band surrounds the wrist to enable one of the adjusting holes to be buckled with the fixing cap so as to fix the catheter sheath on the wrist.

This application pass through the side ear with cooperation between the fixed band encircles the patient's wrist and combines together with the side ear of pipe sheath, can with on the pipe sheath is fixed in the wrist of patient well, and does not need the assistance of adhesive tape or suture, and this fixed mode is simple and convenient, and can well fix the pipe sheath. And the lug of the fixing band and the adjusting hole can not influence the positioning of the sheath when being buckled, and the catheter sheath can not fall off from the blood vessel at the link. When fixing and release the fixed time, only need take out the lug of fixed band from adjusting hole and fixed orifices to need not consume too much manpower and cooperate fixed or release fixedly, need not demolish supplementary fixed material such as adhesive tape, can practice thrift the cost, improve the efficiency of fixed pipe sheath, with the more condition of being applicable to the patient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments of the present application will be briefly described below.

FIG. 1 is a schematic view of a catheter sheath according to an embodiment of the present application;

FIG. 2 is a schematic view of a sheath according to an embodiment of the present application;

FIG. 3 is a schematic view of a fastening strap according to an embodiment of the present application;

FIG. 4 is a schematic view of a fastening strap according to an embodiment of the present application;

FIG. 5 is a schematic view of a sheath engaged with a securing strap according to an embodiment of the present application;

FIG. 6 is a schematic view of a fastening strip having a connecting seam according to another embodiment of the present application;

FIG. 7 is a schematic view of a catheter sheath having a threaded end lug according to an embodiment of the present application;

FIG. 8 is a schematic view of a catheter sheath with a blind-hole fixation band according to an embodiment of the present application;

FIG. 9 is a schematic view of a catheter sheath with magnetic end lugs according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The embodiment of the present application as shown in fig. 1 provides a catheter sheath 10, which includes a sheath 400, a sheath 100 and a fixing band 300. The sheath 100 is fixedly connected with the sheath 400, a hollow channel 110 is arranged in the sheath 100, and the hollow channel 110 is communicated with the inside of the sheath 400. Referring to fig. 2, the outer circumference of the sheath 100 is further provided with a side ear 500, the side ear 500 is provided with a fixing hole 510, and the fixing hole 510 is a through hole. The outer circumference of the sheath 100 is relative to the interior of the hollow passage 110 of the sheath 100. As can be seen in fig. 3 and 4, the fixing band 300 has a plurality of adjustment holes 310 arranged side by side at one end and a lug 200 at the other end. The adjusting hole 310 may be a through hole or a blind hole, and the fixing band 300 may be connected to the sheath 100 and the fixing band 300 may be worn around the wrist to the wrist (as shown in fig. 5) by the cooperation of the fixing hole 510 and the adjusting hole 310 with the lug 200. The sheath 100 has a cylindrical structure with a gradient, and the lug 200 includes a fixing rod 210 and a fixing cap 220, wherein the fixing rod 210 is connected between the fixing band 300 and the fixing cap 220. The adjusting hole 310 of the fixing band 300 is matched with the lug 200, and the lug 200 also passes through the fixing hole 510, so as to fix the catheter sheath 10 on the wrist well and solve the problem of poor fixation between the existing catheter sheath and the wrist.

Because of the arrangement of the side ears 500, the position of the sheath 100 can be fixed after the lugs 200 are inserted into the fixing holes 510. The snap action between the lug 200 at the end of the securing strap 300 and the adjustment hole 310 does not affect the position of the sheath 100, and thus there is no concern that the sheath 400 may fall out of the blood vessel when the catheter sheath 10 of the present application is secured and unsecured.

In one embodiment, the side ear 500 is a flexible side ear, i.e., made of a flexible material. The side ears 500 provide a flexible connection between the sheath 100 and the securing strap 300. The flexibly connected sheath 100 may be protected from displacement interference during the snap-fitting of the securing strap 300 itself. That is, the flexible side ear 500 can be used as a buffer, when the lug 200 of the fixing band 300 and the adjusting hole 310 need to be slightly displaced due to the buckling, the flexible side ear 500 can digest the displacement, and the sheath 100 is prevented from driving the sheath 400 to be displaced greatly.

In one embodiment, the adjusting hole 310 is a through hole, and the lug 200, the side lug 500 and the sheath 100 are made of silicon rubber. In order to improve the connection stability between the side ear 500 and the sheath 100 and to improve the service life, the side ear 500 and the sheath 100 may be integrally formed by the same process. The fixing band 300 is a flexible fixing band capable of deforming, and the fixing band 300 may be made of silicon rubber or thermoplastic elastic material, for example. The sheath 100 is deformed by the side ear 500 to pass through the fixing cap 220 through the fixing hole 510 to be fitted over the lug 200, thereby fixing the sheath 100 and the fixing band 300 together. Then, the fixing band 300 is wrapped around the wrist to deform the fixing band 300 again and passes through the fixing cap 220 through one of the adjusting holes 310 to be sleeved with the lug 200, so that the fixing band 300 takes a ring shape around the wrist and fixes the catheter sheath 10 on the wrist.

In some embodiments, the end of the securing strap 300 near the lug 200 is a straight end and the end near the adjustment hole 310 is an arc end. When the fixing relationship between the fixing band 300 and the sheath 100 is released, the arc-shaped end can facilitate the medical staff to better grasp the fixing band 300 and quickly release the fixing of the fixing band 300 and the lug 200.

In one embodiment, the diameter of the fixing cap 220 is 2mm to 4mm, and the diameter of the fixing rod 210, the fixing hole 510 and the adjusting hole 310 is about 2 mm. The size of the fixing cap 220 is slightly larger than the size of the fixing hole 320 and the adjusting hole 310, and the size of the adjusting hole 310 is slightly larger than the size of the fixing rod 210, so that the size of the adjusting hole 310 can be just matched with that of the fixing rod 210, and the fixing band 300 can deform to a certain extent to enable the adjusting hole 310 and the fixing hole 510 to penetrate through the fixing cap 220 and to be sleeved with the fixing rod 210.

Referring to fig. 6, in some embodiments, the fixing strap 300 further includes a plurality of connecting seams 330, and the connecting seams 330 are connected between the adjusting holes 310 and communicate with adjacent adjusting holes 310. The width of the connecting slit 330 is slightly smaller than the diameter of the adjusting hole 310. Thus, after a certain pressure is applied, the fixing band 300 can be deformed such that the lugs 200 can slide relatively between the adjustment holes 310 and the connecting seams 330 to be sleeved with different adjustment holes 310, thereby adjusting the length of the fixing band 300 around the wrist. When the fixing band 300 is not firmly sleeved on the wrist, the small pressure (which may be relative to the case of pulling out the adjusting hole 310 from between the fixing cap 220 and the sheath 100) applied through the connecting seam 330 without pulling out and reselecting the adjusting hole 310 can make the lug 200 be sleeved on the other adjusting hole 310, so that the fixing band 300 can better fix the catheter sheath 10 on the wrist.

On the other hand, due to the existence of the connecting seam 330, the fixing strap 300 can be deformed more easily, which is equivalent to the fact that the size of the adjusting hole 310 is increased, the sleeving between the adjusting hole 310 and the lug 200 can take less effort, the use is simpler and more convenient, and the fixing strap 300 can be deformed to pass through the fixing cap 220 without applying a large pressure, on the other hand, the width of the connecting seam 330 is smaller than the diameter of the fixing rod 210, after the fixing is successful, the fixing strap 300 under normal use cannot be easily slid to allow the lug 200 to be sleeved with other adjusting holes 310 or cause poor fixing due to the fact that the adjusting hole 310 and the connecting seam 330 are not in smooth transition.

Referring to fig. 7, in an embodiment, the fixing strap 300 is a rigid fixing strap, and one end of the fixing rod 210 away from the fixing cap 220 is provided with a threaded end 215, and the threaded end 215 can be screwed with an internal threaded hole 315 on the fixing strap 300 to fix the lug 200 on the fixing strap 300. The adjusting hole 310 is a through hole and has an internal thread matching with the threaded end 215, and the lug 200 is screwed with the fixing band 300 through one of the fixing hole 510 and the adjusting hole 310 and fixes the sheath 100 on the fixing band. Specifically, after the catheter sheath 10 is placed in a blood vessel of a human body, the fixing band 300 is wrapped around the wrist and the catheter sheath 10, the adjusting hole 310 is selected to have an appropriate wrapped length, the hole position of the adjusting hole 310 is overlapped with the hole position of the fixing hole 510, and the lug 200 passes through the fixing hole 510 and the adjusting hole 310 in sequence and is screwed with the internal threaded hole 315, so that the fixing hole 510 and the adjusting hole 310 are fixed between the fixing cap 220 and the fixing band 300, and the catheter sheath 10 is fixed on the wrist.

The fixing band 300 with the screw holes 315 does not need to pass the adjusting holes 310 and the fixing holes 510 through the fixing cap 220 to limit the circumferential length of the fixing band 300, i.e., the force applied is small, which does not affect the inserted catheter sheath 10, or further destroys the insertion effect of the catheter sheath 10 and increases the difficulty of the operation. And when the use is not needed, the lug 200 can be screwed on the fixing band 300 and then rotated and taken out when the use is needed.

Referring to fig. 8, in some embodiments, the adjusting hole 310 is a blind hole capable of being engaged with the fixing cap 220. After the lug 200 of the fastening band 300 is deformed by the side ear 500 and passes through the fastening hole 510, the adjustment hole 310 is engaged with the lug 200, so that one end of the adjustment hole 310 of the fastening band 300 is fastened to the lug 200, and the fastening band 300 is made into a ring shape and fastens the catheter sheath 10 to the wrist. In contrast to the first embodiment in which the adjusting hole 310 and the fixing hole 510 are both inserted through the fixing cap 220, the adjusting hole 310 is a blind hole that can be fastened, after the fixing band 300 is wrapped around the wrist and a suitable position of the adjusting hole 310 is selected, the fastening structure of the adjusting hole 310 and the fixing cap 220 makes the fastening of the fixing band 300 to the lug 200 easier, and after the operation is completed, the fixing band 300 can be easily unfastened from the state of being fixed to the wrist.

In some embodiments, the blind hole is slightly larger than the fixing cap 220 because the blind hole needs to be fastened to the fixing cap 220. So that the fastening band 300 and the lug 200 can be fastened relatively tightly, and the fastened state of the fastening band 300 and the lug 200 can be released relatively easily.

Referring to fig. 9, in an embodiment, an end of the fixing rod 210 away from the fixing cap 220 is a magnetic end 216 that can attract a metal material. The adjusting hole 310 is provided with a positioning groove 316 attracting the magnetic end 216, and the lug 200 can be attracted into the positioning groove 316 of the adjusting hole 310 through the magnetic end 216, so as to fix the lug 200 on the fixing band 300. The positioning groove 316 may be a metal layer disposed in the positioning groove 316 of the fixing band 300 made of silicon rubber material, so that the metal layer can be attracted to the magnetic end 216 of the lug. Or, the adjusting hole 310 includes a plurality of spliced cylindrical rings with different diameters, wherein the cylindrical ring attracted by the lug 200 is made of metal, the rest cylindrical rings are made of silicon rubber, and the metal and the cylindrical rings made of silicon rubber are fixed through fixing glue.

In one embodiment, the adjusting hole 310 is a blind hole that can be fastened to the fixing cap 220, and the magnetic end 216 passes through the fixing hole 510, and then the magnetic end 216 is attracted to the positioning slot 316 to fix one end of the fixing strap 300. The fixing band 300 surrounds the wrist such that one of the adjusting holes 310 is engaged with the fixing cap 220, so that the fixing band 300 is in a ring shape and fixes the catheter sheath 10 on the wrist.

In one embodiment, the adjusting holes 310 are through holes, the fixing band 300 is wrapped around the wrist, and the adjusting holes 310 are selected at proper positions to make the fixing band 300 have a proper wrapping length. The adjusting hole 310 is overlapped with the fixing hole 510 and the positioning slot 316 is overlapped to form a channel capable of accommodating the fixing rod 210. The magnetic end 216 of the fixing rod 210 passes through the fixing hole 510 through the passage and is engaged with the positioning groove 316 of the adjusting hole 310 to define the fixing hole 510 and the adjusting hole 310 between the fixing cap 220 and the fixing band 300, and the fixing band 300 is in a ring shape and fixes the catheter sheath 10 on the wrist.

Alternatively, the magnetic end 216 may pass through the fixing hole 510 to be engaged with the positioning slot 316, and the fixing band 300 surrounds the wrist to deform the fixing band 300, and one of the adjusting holes 310 may pass through the fixing cap 220 to be sleeved with the lug 200, so that the fixing band 300 is in a ring shape and fixed on the wrist.

With the lug 200 of the magnetic end 216, during the actual operation, the magnetic attraction may make the fixing strap 300 simple to fix and relatively stable by magnetic fixing (e.g. in terms of a force perpendicular to the tangential direction of the outer circumferential surface of the sheath 100). After the operation is completed, the fixing state of the fixing band 300 to the catheter sheath 10 can be released only by pulling out the lug 200 without pulling out the adjusting hole 310 and the fixing hole 510 from the fixing cap 220.

The adjusting hole 310 is a blind hole capable of being engaged with the fixing cap 220, and it should be understood that the engagement form may be an engagement form formed by magnetic force between the fixing cap 220 and the blind hole of the fixing band 300.

In one embodiment, the hardness of the sheath 100 (which is shore hardness) may be 50 ° -70 °, which may be, for example, 60 °; the hardness of the fixing band 300 may be 40-60 °, which may be, for example, 50 °. The width of the fixing band 300 is 5mm to 15mm, and may be, for example, 10 mm. The distance between adjacent adjusting holes 310 is 1.5 mm-2.5 mm, which may be 2mm, for example, and the distance between the adjusting hole 310 closest to one end of the fixing band 300 and the one end is 3mm-5 mm. The distance between the lug 200 and the end of the fixing band 300 far away from the adjusting hole 310 is 3mm-5 mm.

The above-described embodiments do not limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solution.

Claims

1. A catheter sheath, comprising: a sheath tube, a sheath and a fixing band;

the sheath is fixedly connected with the sheath tube, a hollow channel is arranged in the sheath, the hollow channel is communicated with the inside of the sheath tube, a side lug extends from the peripheral surface of the sheath, and a through fixing hole is formed in the side lug;

the fixing band is provided with a plurality of adjusting holes at one end and lugs at the other end, and the fixing band is connected to the sheath through the matching of the fixing holes and the adjusting holes and the lugs, and is used for being worn on the wrist.

2. The catheter sheath of claim 1, wherein the side ears are flexible side ears such that a flexible connection is provided between the sheath and the retention strap.

3. The catheter sheath of claim 1, wherein the lug comprises a securing rod and a securing cap, the securing rod being connected between the securing strap and the securing cap, the securing strap having a straight end at an end proximate the lug and an arcuate end at an end proximate the adjustment aperture.

4. The sheath according to claim 3, wherein the fastening strap is a flexible fastening strap, the adjustment holes are through holes, and the fastening cap of the fastening strap passes through the fastening hole to be fitted over the sheath and around the wrist such that one of the adjustment holes is fitted over the lug, so that the fastening strap is looped and fastens the sheath to the wrist.

5. The introducer sheath according to claim 4, wherein the size of the locking cap is larger than the size of the locking hole and the adjustment hole such that the locking strap and the side ear are deformed to allow the adjustment hole and the locking hole to pass through the locking cap and to be engaged with the lug.

6. The catheter sheath according to any one of claims 1 to 5, wherein the fixing band further comprises a plurality of connecting slits connected between the adjustment holes and communicating adjacent adjustment holes, the width of the connecting slits being smaller than the diameter of the adjustment holes.

7. The sheath of claim 3, wherein the securing strap is a rigid securing strap, the end of the securing rod distal from the securing cap is a threaded end, the adjustment hole is a through hole and has internal threads that mate with the threaded end, and the securing rod passes through one of the securing hole and the adjustment hole and is threadably engaged with the internal threads on the securing strap to secure the sheath to the wrist.

8. The catheter sheath of claim 3, wherein the fastening strap is a flexible fastening strap, the adjustment holes are blind holes that can be engaged with the fastening cap, and the fastening strap is deformed to be engaged with the side ears by the lugs passing through the fastening holes, and to be engaged with the lugs by passing one of the adjustment holes around the wrist, so that the fastening strap is looped and fastens the catheter sheath to the wrist.

9. The catheter sheath of claim 3, wherein the fastening strap is a rigid fastening strap, the end of the fastening rod remote from the fastening cap is a magnetic end, the adjustment hole is provided with a positioning slot engaging with the magnetic end, and the lug engages with the adjustment hole through the magnetic end.

10. The catheter sheath of claim 9, wherein the adjustment holes are blind holes that can be engaged with the retaining cap, the magnetic tip passes through the retaining hole to engage with the retaining groove, and the retaining band encircles the wrist such that one of the adjustment holes engages with the retaining cap to secure the catheter sheath to the wrist.