CN105976687B

CN105976687B - Closed negative pressure type high-capacity venous model blood circulation device

Info

Publication number: CN105976687B
Application number: CN201610618422.4A
Authority: CN
Inventors: 张大新
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-08-01
Filing date: 2016-08-01
Publication date: 2021-12-03
Anticipated expiration: 2036-08-01
Also published as: CN105976687A

Abstract

Closed negative pressure type high-capacity venous model blood circulation device. The invention belongs to a medical teaching model, and particularly relates to a teaching model blood circulation prime device for venipuncture. The device has the structure that a closed blood plasma storage tank is connected with an inlet of an elastic working bag, an outlet of the elastic working bag is connected with a vein model blood vessel network, an outlet of the vein model blood vessel network is connected to the blood plasma storage tank through a blood plasma return pipe, a liquid discharge pipe is connected beside the return pipe, a one-way valve is respectively arranged at the outlet and the inlet of the elastic working bag, and a one-way damping valve is arranged at the position of the vein model blood vessel network connected with the blood plasma storage tank. The device of the invention is connected with the vein model of the corresponding part, so that a high simulation model with vein blood circulation can be formed, and the device can be provided for a practicer to carry out operation exercises matched with clinical venous transfusion.

Description

Closed negative pressure type high-capacity venous model blood circulation device

Technical Field

The invention belongs to a medical teaching model, and particularly relates to a teaching model blood circulation prime mover for venipuncture.

Background

The animal is adopted in most of the current venipuncture teaching, the teaching cost is high, and students usually have difficulty in getting the opportunity of practice. In order to solve the problem, Chinese patent documents disclose puncture models for simulating training arms, palms and the like, wherein most of the training models are structurally characterized in that a simulated vein is arranged under a silica gel skin, the simulated vein model is connected with an externally hung plasma sac, and the blood sac is hung by the height of the plasma sac to fill blood vessels under the action of gravity. The principle is simple, the simulation degree is low, the simulation degree cannot be matched with the actual clinical operation, the practice of the whole infusion process cannot be completed, and the use has great limitation.

Disclosure of Invention

The invention aims to solve the technical problem of providing a closed negative pressure type high-capacity venous model blood circulation device which can be connected with various venous models to form a high-simulation model with venous blood circulation, the amount of the simulated blood is large, the simulated liquid medicine can be automatically shunted with the blood in the transfusion process, and the device can be provided for a practicer to carry out operation exercises matched with clinical venous transfusion.

The technical scheme adopted for realizing the above purpose of the invention is as follows: the closed blood plasma storage tank is connected with the inlet of the elastic working bag, the outlet of the elastic working bag is connected with the vein model blood vessel network, the outlet of the vein model blood vessel network is connected with the blood plasma storage tank through a blood plasma return pipe, a liquid discharge pipe is connected beside the return pipe, a one-way valve is respectively arranged at the outlet and the inlet of the elastic working bag, and a one-way damping valve is arranged at the position of the vein model blood vessel network connected with the blood plasma storage tank.

The elastic working bag is a spherical hollow bag, and each one-way valve adopts a valve type one-way valve.

The inlet of the elastic working bag is connected to the lower part of the plasma storage tank through a pipette, the outlet of the vein model blood vessel net is connected to the upper part of the plasma storage tank through a return pipe, and the return pipe is connected to the position, close to the plasma storage tank, of the return pipe in a bypass mode.

Has the advantages that: because the invention adopts the closed blood plasma storage tank to be connected with the elastic working bag and arranges the one-way valve at a proper position, the blood plasma storage tank greatly increases the amount of the simulated blood; the elastic working bag is favorable for being connected with the venipuncture model of each part and can provide enough pressure to ensure that the vein filling degree of the puncture part is better; the arrangement of the one-way valves and the liquid discharge pipe ensures that the simulated liquid medicine can be automatically shunted with blood, so that the blood plasma can not be diluted when the intravenous puncture model is used for many times or connected into a plurality of venipuncture models during infusion practice.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

In the figure: the device comprises a return pipe 1, a vein model blood vessel network 2, a one-way valve 3, an elastic working bag 4, a one-way valve 5, a damping valve 6, a liquid discharge pipe 7, a plasma storage tank 8, a pipette 9 and an output pipe 10.

Detailed Description

The structure of the invention is further described in the following with the attached drawings.

Referring to the drawings, the device comprises 3 parts, a vein model blood vessel net 2 (elastic rubber tube), an elastic working bag 4 (made of rubber with good elasticity) and a blood plasma storage tank 8 (made of hard plastic). The inlet and outlet of the elastic working bag 4 are provided with one-

way valves

5 and 3. When the elastic working bag 4 is pressurized, the bag internal pressure is increased, the one-way valve 3 and the damping valve 6 are opened, the one-way valve 5 is closed, the simulated plasma flows into the venous blood pipe network 2 through the output pipe 10 and then flows into the plasma storage tank 8 through the return pipe 1. When the pressure on the elastic working bag 4 is relieved, the negative pressure in the elastic working bag 4 is increased, and the plasma is simulated to flow into the elastic working bag 4 from the plasma storage tank 8 to form the circulation of venous blood. If the elastic working bag 4 and the return pipe 1 are pressurized at the same time, the pressure in the bag is increased and the return is blocked, the one-way valve 3 is opened, the one-way valve 5 is closed, the simulated blood plasma stored in the bag is filled into the vein model blood vessel network 2, the vein blood vessel network is full and the pressure is increased, and the return blood can be seen if the vein blood vessel network is punctured. When the pressure on the elastic working bag 4 and the return pipe 1 is relieved, the negative pressure in the elastic working bag 4 is increased, the one-way valve 3 is automatically closed, and the one-way valve 5 is automatically opened. The plasma in the plasma storage tank 8 flows into the elastic working bag 4 under the action of negative pressure, and the plasma in the return pipe 1 flows into the plasma storage tank 8 under the action of negative pressure. When the elastic working bag 4 is in a static rotating state, the simulation liquid medicine is delivered to the vein model, the liquid discharge pipe 7 is in a fully open state, the backflow pipe 1 is provided with the one-way damping valve 6 to form certain resistance, the delivered liquid only flows towards the direction of the open non-resistance liquid discharge pipe 7 and does not flow into the vein plasma storage tank 8, and the purpose of automatically shunting the simulation liquid medicine and blood is achieved. The device can be connected with any vein model to form an automatic blood circulation high-simulation vein model, and the plasma capacity of the vein model can be determined according to the size of the vein plasma storage tank.

Claims

1. The utility model provides an airtight negative pressure formula large capacity vein model blood circulating device which characterized by: the closed blood plasma storage tank (8) is connected with an inlet of the elastic working bag (4), an outlet of the elastic working bag (4) is connected with the vein model blood vessel network (2), an outlet of the vein model blood vessel network (2) is connected to the blood plasma storage tank (8) through the blood plasma return pipe (1), a liquid discharge pipe (7) is connected beside the return pipe (1), a first one-way valve (3) is arranged at the outlet of the elastic working bag (4), a second one-way valve (5) is arranged at the inlet, a one-way damping valve (6) is arranged at the position, connected with the blood plasma storage tank (8), of the vein model blood vessel network (2), and the first one-way valve (3) and the second one-way valve (5) adopt valve type one-way valves;

the inlet of the elastic working bag (4) is connected to the lower part of the plasma storage tank (8) through a pipette (9), the outlet of the vein model blood vessel net (2) is connected to the upper part of the plasma storage tank (8) through a return pipe (1), a liquid discharge pipe (7) is connected to the position, close to the plasma storage tank (8), of the return pipe (1) in a bypass mode, and the elastic working bag (4) is a spherical hollow capsule;

when the elastic working bag (4) is pressurized, the pressure in the bag increases, the first one-way valve (3) and the one-way damping valve (6) are opened, the second one-way valve (5) is closed, and the simulated blood plasma flows into the vein model blood vessel network (2) through the output pipe (10) and then flows into the blood plasma storage tank (8) through the return pipe (1);

when the pressure on the elastic working bag (4) is relieved, the negative pressure in the elastic working bag (4) is increased, and the simulated blood plasma flows into the elastic working bag (4) from the blood plasma storage tank (8) to form the circulation of venous blood;

when the elastic working bag (4) and the return pipe (1) are pressurized simultaneously, the pressure in the bag is increased and the return is blocked, the first one-way valve (3) is opened, the second one-way valve (5) is closed, the simulated blood plasma stored in the bag is filled into the vein model blood vessel network (2), the vein model blood vessel network (2) is full and the pressure is increased, and if the vein model blood vessel network (2) is punctured, the blood return can be seen;

when the pressure on the elastic working bag (4) and the return pipe (1) is relieved, the negative pressure in the elastic working bag (4) is increased, the first one-way valve (3) is automatically closed, and the second one-way valve (5) is automatically opened;

under the action of negative pressure, the plasma in the plasma storage tank (8) flows into the elastic working bag (4), and under the action of negative pressure, the plasma in the return pipe (1) flows into the plasma storage tank (8);

when the elastic working bag (4) is in a static state, the simulation liquid medicine is conveyed to the vein model, the liquid discharge pipe (7) is in a fully open state, the backflow pipe (1) is provided with the one-way damping valve (6) to form certain resistance, and the conveyed liquid only flows towards the direction of the opened non-resistance liquid discharge pipe (7) and cannot flow into the vein plasma storage tank (8), so that the purpose of automatically shunting the simulation liquid medicine and blood is realized.