CN209734739U

CN209734739U - Deep venous catheter capable of changing number of cavities

Info

Publication number: CN209734739U
Application number: CN201821419340.8U
Authority: CN
Inventors: 张金旻; 刘福晨; 郭兴刚; 董伟; 邵雪晴; 王剑; 刘辉
Original assignee: Second Military Medical University SMMU
Current assignee: Second Military Medical University SMMU
Priority date: 2018-08-31
Filing date: 2018-08-31
Publication date: 2019-12-06
Anticipated expiration: 2028-08-31

Abstract

the utility model provides a deep venous catheter capable of changing the number of cavities, which comprises an inner catheter and an outer catheter, wherein the outer catheter comprises an outer catheter pipeline and an outer catheter joint arranged at the tail end of the outer catheter pipeline; the inner conduit comprises a long conduit, a short conduit and a connecting part, and the head end of the connecting part is detachably connected with the outer conduit joint; the connecting part is internally provided with a first tube cavity and a second tube cavity, and the long catheter and the short catheter are respectively fixed in the first tube cavity and the second tube cavity; one end of the long conduit is connected with a long conduit joint, and the other end of the long conduit extends into the outer conduit pipeline; one end of the short conduit is connected with a short conduit joint, and the other end is communicated with a cavity formed by the outer conduit pipeline and the long conduit. The inner catheter designed by adopting the detachable one-long-one-short double catheters can change the outer catheter from an original one lumen into two lumens after the inner catheter is connected with the outer catheter, thereby conveniently realizing the switching between the single-lumen venous catheter and the double-lumen venous catheter, and effectively reducing the problems of resetting the catheter, air embolism, infection and the like.

Description

Deep venous catheter capable of changing number of cavities

Technical Field

The utility model relates to a dark ductus venosus, concretely relates to can change dark ductus venosus of cavity quantity.

Background

In clinical medical activities, if a patient needs to be subjected to rapid mass transfusion, central venous pressure measurement or parenteral nutrition support, the deep vein of the patient is often punctured and a deep venous catheter is reserved.

The indwelling catheter has a single lumen and a multi-lumen. When the catheter is used, catheters with different number of cavities can be selected according to different purposes, for medical staff, the number of the cavities of the indwelling catheter is difficult to select, when multiple liquids are required to be infused simultaneously, in order to avoid mutual reaction among the liquids, one catheter is required to have a plurality of cavities, when multiple liquids are not required to be infused simultaneously, the unused cavities need to be sealed by anticoagulant drugs, and even if the problems of embolism, infection and the like easily occur.

in response to the above requirements, two general approaches are clinically used: one is a deep venous catheter with multiple cavities which is pre-indwelling and is used for sealing redundant cavities or re-indwelling a single-cavity deep venous catheter when not needed; the other is to pre-place a single-cavity deep venous catheter, and place the deep venous catheter again when a cavity channel needs to be added.

Since deep venipuncture is a risky procedure, repeated placement of a deep venous catheter increases the risk of the procedure and also increases the discomfort and economic burden on the patient. Therefore, there is a need for a deep venous catheter that allows for simple adjustment of the number of lumens in response to the operation and requirements of existing deep venipuncture catheters.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art, and solve the problem that the existing deep venous catheter cavity is fixed in quantity and is not easy to change.

In order to achieve the above object, the utility model provides a can change dark ductus venosus of cavity quantity, include:

The outer pipe comprises an outer pipe pipeline and an outer pipe joint, the outer pipe joint is arranged at the tail end of the outer pipe pipeline, and the head end of the outer pipe pipeline is a tapered opening;

the inner conduit comprises a long conduit, a short conduit and a connecting part, and the head end of the connecting part is detachably connected with the outer conduit joint; the connecting part is internally provided with a first tube cavity and a second tube cavity, and the long catheter and the short catheter are respectively fixed in the first tube cavity and the second tube cavity; one end of the long conduit extends out of the tail end of the connecting part and is connected with a long conduit joint, and the other end of the long conduit extends into the outer conduit pipeline; one end of the short conduit extends out of the tail end of the connecting part and is connected with a short conduit joint, and the other end of the short conduit is communicated with a cavity formed by the outer conduit pipeline and the long conduit.

Preferably, in the deep venous catheter with the changeable number of cavities, a fixing buckle is arranged at the joint of the connecting part and the outer catheter joint.

Preferably, in the deep intravenous catheter with the variable number of cavities, when the connecting part is separated from the outer catheter, the connecting part, the long catheter and the short catheter are withdrawn out of the inner part of the outer catheter together.

Preferably, in the deep intravenous catheter with the variable number of cavities, when the inner catheter is fixedly connected to the outer catheter through the connecting part, the other end of the long catheter extends out of the front end of the pipeline of the outer catheter.

Compared with the prior art, the utility model has the advantages that: the inner catheter adopts a double-catheter design with one long catheter and one short catheter, is detachably connected with the outer catheter through the connecting part, and can change an original lumen of the outer catheter into two lumens after the inner catheter is connected, namely, the lumen formed by the long catheter and the lacuna formed by the long catheter and the outer catheter, so that the number of the lumens of the deep venous catheter can be flexibly adjusted, and different infusion requirements are met.

Drawings

FIG. 1 is an overall perspective view of the present invention;

Fig. 2 is an overall sectional view of the present invention.

in the figure:

1-outer conduit 11-outer conduit pipe 12-outer conduit joint

2-inner conduit 21-long conduit 211-long conduit joint

22-short conduit 221-short conduit joint 23-connecting part

231-fixing buckle

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

The deep intravenous catheter with the changeable number of cavities shown in fig. 1 to 2 comprises an outer catheter 1 and an inner catheter 2.

The outer catheter 1 is similar to the existing single-lumen deep venous catheter structure and comprises an outer catheter tube 11 and an outer catheter joint 12. The outer conduit pipe 11 is tubular as a whole, and has a length of 20cm, an inner diameter of 3mm and an outer diameter of 3.5 mm. The head end of the outer catheter pipeline 11 is a tapered opening, namely, a tubular structure with the head end slightly contracted, and the design of the tapered opening is beneficial to smooth puncture when the puncture is placed into a blood vessel. An outer conduit fitting 12 is disposed at the trailing end of the outer conduit tube 11 and is in communication therewith. The outer catheter adapter 12 is used for connecting with a syringe head end, a transfusion tube head end or a heparin cap and the like which are commonly used in clinic, and can be tightly connected with the connecting part 23 of the inner catheter 2.

The inner pipe 2 is composed of a long pipe 21, a short pipe 22, and a connecting portion 23. The connecting part 23 is internally provided with a first lumen (not shown) and a second lumen (not shown) which are used for providing installation positions for the long catheter 21 and the short catheter 22, and the long catheter 21 and the short catheter 22 are respectively fixed in the first lumen and the second lumen in a sealing manner. The long duct 21 is longer than the short duct 22, the dimensions of the long duct 21 being preferably: the length is 20.5cm, the inner diameter is 1.9mm, and the outer diameter is 2.2 mm. The front end of the long catheter 21 can be placed in the outer catheter tube 11 of the outer catheter 1 through the lumen I, and the rear end thereof is provided with a long catheter connector 211, and the long catheter connector 211 is used for connecting with the head end of a common syringe, the head end of an infusion tube or a heparin cap and the like.

In a preferred embodiment, the front end of the long conduit 21 of the inner conduit 2 is slightly longer than the length of the outer conduit 11 after being placed and fixed in the outer conduit 11, i.e. the front end of the long conduit 21 extends out of the head end of the outer conduit 11. Fluid infused through long catheter fitting 211 may pass directly into the blood vessel through the tubing of long catheter 21.

The front end of the short catheter 22 is communicated with the cavity formed by the long catheter 21 and the outer catheter tube 11, and the rear end thereof is provided with a short catheter joint 221 which is used for connecting with the head end of a common syringe, the head end of an infusion tube or a heparin cap and the like. The structure and size of the outer catheter adapter 12, the short catheter adapter 221 and the long catheter adapter 211 are the same, and may be conventional medical luer adapters, which are not described herein again.

The connecting part 23 is located at the middle rear part of the inner catheter 2, is of a thin front and thick rear tubular structure, and is internally provided with a first lumen and a second lumen for connecting the long catheter 21 and the short catheter 22 into a whole, and can be inserted into and tightly connected with the outer catheter joint 12. In order to increase the stability of the connection between the inner catheter 2 and the outer catheter 1, the outer layer of the connection part 23 is provided with a fixing buckle 231, which can ensure that the outer catheter 1 and the inner catheter 2 which are connected together cannot be separated. After the inner catheter 2 is placed into the outer catheter 1 and fixed, the short catheter 22 of the inner catheter 2, the liquid infused through the short catheter connector 221 flows through the lumen inside the outer catheter tube 11 and outside the long catheter tube 21 and flows into the blood vessel through the front end of the outer catheter tube 11.

When the long catheter end 21 of the inner catheter 2 is used, the outer catheter 1 is placed and fixed according to the conventional deep venipuncture catheterization process. When the cavity needs to be added, the inner catheter 2 is placed into the outer catheter tube 11, specifically, after the connecting portion 23 of the inner catheter 2 is tightly connected to the outer catheter connector 12 (such as interference snap fit or threaded connection), the fixing buckle 231 is locked, and at this time, the outer catheter tube 11 is divided into two cavities, one cavity is the inner catheter long catheter 21, and the other cavity is a space formed by the outer catheter tube 11 and the outer side of the inner catheter 2 long catheter 21. At this point, the fluid infusion is performed through the two connectors of the inner catheter 2, i.e., the long catheter connector 211 and the short catheter connector 221, respectively. When the device is used, the inner catheter 2 can be pulled out after the fixing buckle 231 is released, at the moment, the number of cavities of the deep venous catheter is reduced, and only the outer catheter 1 is remained for continuous retention.

To sum up, the utility model discloses in, through adopting the detachable inner catheter of a long and a short, can conveniently realize the switching between single chamber ductus venosus and the two-chamber ductus venosus to effectively reduced and reset pipe, air embolism and infection scheduling problem.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, and that various changes and modifications may be made, which are within the scope of the appended claims.

Claims

1. A deep venous catheter with a variable number of lumens, comprising:

2. The deep venous catheter with the variable cavity number as claimed in claim 1, wherein a fixing buckle is arranged at the connection position of the connecting part and the outer catheter joint.

3. The variable lumen deep venous catheter of claim 1 wherein the connector, the long catheter and the short catheter are withdrawn together from the interior of the outer catheter when the connector is separated from the outer catheter.

4. The variable lumen deep venous catheter of claim 1 wherein the other end of the long catheter extends out of the forward end of the outer catheter tube when the inner catheter is fixedly attached to the outer catheter by a connection.