CN111939428B

CN111939428B - Protective sheath and device for cutting of catheter in infusion port

Info

Publication number: CN111939428B
Application number: CN202010739470.5A
Authority: CN
Inventors: 王乐; 张灵小; 许刚; 刘博�; 陈霄; 王玮
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-28
Filing date: 2020-07-28
Publication date: 2022-08-30
Anticipated expiration: 2040-07-28
Also published as: CN111939428A

Abstract

The application provides a protection sheath and a protection device for cutting a catheter of an infusion port, aiming at avoiding the increase of uncertain risks brought by manual operation, preventing a surgical blade from damaging the catheter and improving the operation safety and the operation efficiency. The cutting protection sheath for the transfusion port catheter is made of a sheet made of metal materials and is divided into an upper section, a middle section and a lower section along the axial direction; the middle section and the lower section form a cylindrical sheath body with a notch on one side integrally, the inner diameter of the sheath body is matched with the outer diameter of the catheter to be protected, the protective sheath is attached to the catheter, and meanwhile the protective sheath can naturally slide down along the catheter to be protected under the action of gravity; the upper section is in a strip shape, is axially connected to the other side of the upper end of the middle section, which corresponds to the notch, and is tilted in the direction away from the axis of the sheath body; the middle section is an annular belt with a notch at one side; the corresponding gap edges are in arc transition from the sheath ring to the sheath tail wing.

Description

Protective sheath and device for cutting of catheter in infusion port

Technical Field

The application relates generally to a device for protecting a catheter during a clinical treatment (e.g., peritoneal perfusion) operation.

Background

The abdominal cavity perfusion treatment is one of the commonly used treatment methods in the medical field, the vein harbor abdominal wall implantation is a new technical application of the abdominal cavity perfusion treatment, the working principle is that a catheter is buried under the abdominal skin and connected with the abdominal cavity, a device which is not easy to infect and easy to operate repeatedly is established, the operation times of abdominal cavity puncture are reduced, a plurality of inconveniences caused to a patient by the movement of the catheter are avoided, the pain and the fear of the patient are relieved, the life quality of the patient is improved, and the probability of abdominal cavity infection is reduced. In addition, the implementation of the technology can simplify the operation of abdominal cavity perfusion chemotherapy of a clinician, improve the working efficiency and the safety of perfusion chemotherapy, and is a technical application with two functions. In this technical application, after inserting the pipe into the abdominal cavity, need make a slope at the abdominal wall subcutaneous tissue, prevent that the pipe from forming the right angle and influencing the use, when carrying out skin cutting again after the pipe is inserted, because need directly sharp separation cutting skin with the operation blade, must pay attention to the knife tip carefully and avoid the pipe, prevent that the unexpected fish tail pipe of blade from leading to the operation failure, this operation can only rely on operator's technique, need operator's concentration, avoid the pipe as far as possible, there are many uncertain factors, the risk of accident takes place is higher.

In addition, in practice operation of medical students, the fixed device is required to be used for repeatedly practicing operation, the catheter implantation is the basic operation technology at present, and in the practice process, the students who operate lack skilled technology are easy to scratch the catheter, so that the operation risk and the teaching cost are increased.

Disclosure of Invention

The application provides a protection sheath for cutting of a catheter at an infusion port, aims to avoid the increase of uncertain risks brought by manual operation, prevents a surgical blade from damaging the catheter, and improves the operation safety and the operation efficiency.

The solution of the present application is as follows:

the cutting protective sheath for the catheter at the infusion port is made of a sheet made of metal materials and is divided into an upper section, a middle section and a lower section along the axial direction; the middle section and the lower section form a cylindrical sheath body with a notch on one side integrally, the inner diameter of the sheath body is matched with the outer diameter of the catheter to be protected, the protective sheath is attached to the catheter, and meanwhile the protective sheath can naturally slide down along the catheter to be protected under the action of gravity;

the upper section is in a strip shape, is axially connected to the other side of the upper end of the middle section, which corresponds to the notch, and is tilted in the direction away from the axis of the sheath body;

the middle section is an annular belt with a notch at one side and is marked as a sheath ring, and the arc length corresponding to the notch at the middle section is marked as a;

the part of the lower section, which is close to the middle section, is recorded as a sheath waist part, and the arc length corresponding to the notch of the sheath waist part is recorded as b;

the part of the lower section close to the bottom end is marked as a sheath tail wing, and the arc length corresponding to the notch of the sheath tail wing is marked as c;

noting that the complete circumferential length of the cylindrical sheath is D, the notch size relationship at different positions is as follows: a is more than c and less than b and less than D/2; the corresponding gap edges are in arc transition from the sheath ring to the sheath tail wing.

Optionally, the cylindrical sheath body with the one-side notch is distributed in bilateral symmetry with respect to the axial section of the upper section.

Optionally, when the sheath tail is unfolded to be a plane, the vertex of the lower end of the sheath tail is positioned on the central symmetry axis.

Optionally, a/D is 1/8 ~ 1/4.

Optionally, the length of the upper section is 1/3-1/2 of the length of the whole protective sheath.

Optionally, the thickness of the sheet of metal material is 1mm to 5 mm.

Optionally, the sheet made of metal material is specifically made of medical stainless steel, titanium-nickel alloy or pure titanium, and meets the requirements of better ductility, and is firm and scratch-resistant.

Optionally, the edges of the indentations are rounded.

Optionally, the top end of the upper section is rounded.

The present application further provides an infusion port catheter integrated device that includes not only an infusion port catheter, but also is configured with the above described infusion port catheter cutting protection sheath for sheathing over the exterior of an implanted infusion port catheter. The value of the gap d between the inner wall of the sheath body and the outer wall of the catheter to be protected is preferably more than 0 and less than 3 mm.

The application can complete the whole operation very efficiently and safely by adding a simple catheter protection sheath. Compared with the prior art, the method has the following advantages that:

1. with traditional catheter implantation cutting technique and teaching operation, this application has greatly reduced the risk of catheter damage.

2. The protective sheath is light and thin, can be well attached to the catheter, protects the body close to the catheter and increases the success probability of the operation.

3. The edge of the protective sheath is smooth, and secondary damage is not easy to cause.

4. The design is simple, and the protection sheath integrated into one piece is difficult to damage, can use after disinfecting repeatedly.

5. The operation is simple, the self gravity of the protective sheath can be utilized to slowly go deep into the tissue gap in the cutting process, and the upwarping part of the upper section can be conveniently worn and taken off by hand.

Drawings

Figure 1 is a schematic view of an inadvertent scoring of the port catheter during a sharp separation cut through the skin.

Fig. 2 is a schematic view of the working principle of the cutting protection sheath for the port infusion catheter of the present application.

Figure 3 is a schematic view of the cutting sheath of the port catheter of the present application.

Fig. 4 is a schematic view of fig. 3 after being unfolded.

Figure 5 is a schematic view of the port catheter cutting sheath removed from the catheter.

The reference numbers illustrate:

1-sheath handle; 2-a sheath ring; 3-sheathing the waist; 4-sheath tail fin.

Detailed Description

The technical solutions and effects of the present application are further described below by way of embodiments with reference to the accompanying drawings.

In the process of implanting the abdominal wall of the catheter in the infusion port, an oblique incision needs to be made on the skin and subcutaneous tissues, so that the right angle of the catheter is prevented from influencing the smoothness of the catheter. As shown in fig. 1, the skin is cut with a sharp direct separation of the surgical blade, which can easily scratch the catheter of the port if the operation is careless, resulting in a failure of the operation.

As shown in fig. 2, this embodiment provides a removable protective sheath, which is sheathed on a catheter after the catheter is implanted, and the surgical blade can cut the skin and subcutaneous tissue even if the surgical blade accidentally touches the vicinity of the catheter slightly, the surgical blade can not scratch the catheter due to the shielding of the protective sheath, and the catheter can be effectively prevented from being damaged; and in the operation process of the scalpel, the protective sheath naturally slides down along with the lowering of the catheter due to gravity, so that the catheter is protected in the operation area of the scalpel all the time.

The specific structure of the protective sheath of this embodiment is shown in fig. 3 and 4, and the protective sheath is made of a metal sheet and divided into an upper section, a middle section and a lower section along the axial direction.

The upper section is in a warped strip form, and by pressing and pulling the sheath handle 1 obliquely downward away from the catheter, the notch in the middle section can be automatically opened by the ductility of the sheet.

The middle section is in a ring-shaped strip shape with a gap, and the gap is relatively small as a sheath ring 2, so that the part is easy to deform and is attached to the catheter to form circumference protection; and when the upper section is pressed and pulled, the notch can be opened, which is beneficial to the installation and the separation of the protective sheath.

The hypomere comprises sheath waist 3 and sheath fin 4, and sheath fin parcel area is great, effectively wraps up the pipe, effectively avoids scalpel fish tail pipe, and the sheath fin of expansion can cooperate the ring banding fixed catheter in middle section, prevents simultaneously that the protection sheath from scratching into and is difficult for peeling off behind the subcutaneous tissue.

Specifically, the middle section and the lower section integrally form a cylindrical sheath body with a notch on one side, the edge of the notch is smooth, and the inner diameter of the sheath body is matched with the outer diameter of the catheter to be protected so as to meet the requirement that the protective sheath can naturally slide down along the catheter to be protected under the action of gravity; the upper section is in a strip shape, is axially connected to the other side of the upper end of the middle section, which corresponds to the notch, and is tilted towards the direction far away from the axis of the sheath body; the middle section is an annular belt with a gap at one side and is marked as a sheath ring, and the arc length corresponding to the gap at the middle section is marked as a; the part of the lower section close to the middle section is recorded as the waist part of the sheath, and the arc length corresponding to the notch of the waist part of the sheath is recorded as b; the part of the lower section close to the bottom end is recorded as a sheath tail, and the arc length corresponding to the notch of the sheath tail is recorded as c; the whole protective sheath for cutting the infusion port catheter is distributed in a bilateral symmetry mode relative to the section plane of the axis of the upper section; noting that the complete circumference length of the cylindrical sheath body is D, the notch size relationship at different positions is as follows: a < c < b < D/2, a/D is 1/8-1/4.

The length of the upper section is 1/3-1/2 of the length of the whole protective sheath, and the width of the upper section is slightly larger than the width of a notch at the position of the sheath ring.

From the sheath ring to the sheath empennage, the edges of the corresponding notches are in arc transition, and the top end of the upper section is rounded. When the sheath tail is unfolded to be a plane, the vertex of the lower end of the sheath tail is positioned on the central symmetry axis.

Utilize the protective sheath that this embodiment provided, not only solved the difficult problem of pipe cutting protection, helped student's teaching simultaneously. In the practice process of medical students, the catheter is implanted to protect the catheter, so that the catheter can be prevented from being damaged, the operation risk and the practice cost are reduced, and multiple purposes are achieved.

The specific material of the protective sheath is not limited, and preferably, the protective sheath is a light and thin metal material, such as stainless steel, titanium-nickel alloy or pure titanium, the selected material is a medical material which does not cause human rejection reaction, the protective sheath is separated from the catheter after being used, the time for contacting the skin of a human body is short, the application limit of the actual material is not strict, and the thickness of the material is preferably 1mm-5 mm.

The optimization of the size and shape of the protective sheath is also determined by a large number of clinical practices, and the shape of the protective sheath can be slightly adjusted. However, it should be noted that: if the upper end is too sharp, an operator is possibly scratched, and if the middle section annular wrapping radius is too small, the operator is easy to slip; if the lower tail wing is narrower, the risk that the catheter is scratched by the surgical blade still exists.

Claims

1. The cutting protective sheath for the catheter at the infusion port is characterized by being made of a sheet made of metal materials and being divided into an upper section, a middle section and a lower section along the axial direction; the middle section and the lower section integrally form a cylindrical sheath body with a notch on one side, the inner diameter of the sheath body is matched with the outer diameter of the catheter to be protected, the protective sheath is attached to the catheter, and meanwhile, the protective sheath can naturally slide down along the catheter to be protected under the action of gravity;

the protective sheath is used for being sleeved on the infusion port catheter after the infusion port catheter is implanted, so that the infusion port catheter cannot be scratched when the surgical blade cuts skin and subcutaneous tissues, and the protective sheath naturally slides down due to gravity along with the lowering of the infusion port catheter in the operation process of the scalpel, so that the infusion port catheter is protected in the operation area of the scalpel all the time;

the part of the lower section, which is close to the middle section, is marked as a sheath waist part, and the arc length corresponding to a gap of the sheath waist part is marked as b;

noting that the complete circumference length of the cylindrical sheath body is D, the notch size relationship at different positions is as follows: a is more than c and less than b and less than D/2; the corresponding gap edges are in arc transition from the sheath ring to the sheath tail wing.

2. The cutting sheath for the port catheter of claim 1, wherein the sheath body has a lateral notch and is disposed symmetrically with respect to the axial section of the upper section.

3. The cutting protection sheath for a catheter at a port of infusion according to claim 1 or 2, wherein the lower end of the sheath fin is located at the center symmetry axis when the sheath fin is unfolded to be a plane.

4. The protective sheath for incision of an infusion port catheter as claimed in claim 1, wherein a/D is 1/8-1/4.

5. The protective sheath for incision of an infusion port catheter as claimed in claim 1, wherein the length of the upper section is 1/3-1/2 of the length of the whole protective sheath.

6. The cutting sheath for a port catheter as claimed in claim 1, wherein the thin sheet of metal material has a thickness of 1mm to 5 mm.

7. The cutting sheath for the port infusion catheter as claimed in claim 1, wherein the thin sheet of metal material is selected from the group consisting of stainless steel, titanium-nickel alloy and pure titanium.

8. The port catheter cutting protection sheath of claim 1, wherein the edges of the notch are rounded.

9. The port catheter cutting sheath of claim 1 wherein the upper section is rounded at its top end.

10. An infusion port catheter device comprising an infusion port catheter, further comprising the infusion port catheter cutting protection sheath of claim 1 configured to fit over the exterior of the implanted infusion port catheter.