WO1999030755A1

WO1999030755A1 - Bellows-type pump for medical use

Info

Publication number: WO1999030755A1
Application number: PCT/CN1997/000144
Authority: WO
Inventors: Hong Jia; Hong Wu; Ying Jia
Original assignee: Hong Jia; Hong Wu; Ying Jia
Priority date: 1997-12-16
Filing date: 1997-12-16
Publication date: 1999-06-24
Also published as: AU5396898A

Abstract

This invention relates to a bellows-type pump for medical use, especially, for emergency treatment. The pump consists of a flexible member which is (8) of (U) shaped and has an upward opening and a bellows provided with an inlet and outlet tube. The ends with inlet and outlet of the bellows are arranged between two ends of the flexible member. The pump can produce differential pressure through pulling or pressing the bellows by the way of operating the flexible member with hand and foot. The pump has good property on charge and discharge, and compactible, low cost and disposable.

Description

Corrugated tube type medical pump The utility model relates to a corrugated tube type medical pump, which is especially suitable for use at the emergency site. In medical care, sputum, pus, blood, and amniotic fluid are often attracted and washed. Because sputum, pus, and blood have a certain degree of sputum, most of the membrane-type electromechanical aspirators are currently used, and the suction is required to be controlled at any time during the suction, and intermittent Intermittent operation makes the electromechanical control mechanism complicated, cumbersome to operate, bulky, and costly, and it is difficult to popularize it to the emergency site. At present, there is a small type of pedal or manual piston medical aspirator on the market. Its structure requires high manufacturing processes, so the cost is high, and it is difficult to popularize it. Moreover, such medical aspirators are used by many people. Frequent cleaning and disinfection is more troublesome. Although sometimes sputum and amniotic fluid are only tens of milliliters, if it is not attracted in time, it will also cause severe consequences of suffocation and death. This situation often occurs in newborn babies and sick elderly people. Chinese Utility Model Patent No. 95235398. 9 discloses a manual sputum suctioner, which is composed of a frame, a pull handle, a spring, and a suction tube. The structure is relatively complicated and the negative suction pressure generated is small.

The purpose of the utility model is to provide a medical pump which is compact, lightweight, hygienic and inexpensive, and can be used once.

The corrugated tube medical pump of the utility model is composed of an elastic frame and a corrugated pump barrel with inlet and outlet tubes. The elastic frame is an 8-shaped or U-shaped upper opening. The corrugated pump barrel has two inlet and outlet tubes. The ends are respectively clamped at two ends of the elastic frame. Springs can be added to the elastic frame to increase elasticity.

During use, the elastic frame is manually stretched or the foot is compressed to change the volume of the corrugated pump barrel to produce a pressure difference. The corrugated pump barrel has the characteristics of easy axial deformation and large radial pressure resistance, so it can form a pump barrel with high efficiency, no leakage and good charge and suction performance. Also, the elastic frame is a single component and easy to manufacture. The medical pump of the utility model has the advantages of simple structure, low cost, convenient and quick assembly and disassembly.

The following further describes the present invention in detail with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention, which is a manual attractor.

FIG. 2 shows a second embodiment of the present invention, which is a foot-suction and suction pump.

The manual suction device shown in FIG. 1 is composed of a corrugated pump cylinder 1, an "8" elastic frame with an upper opening, an inlet pipe 3 with a check valve, an outlet pipe 4, and a liquid bag 5. The lower part of the elastic frame is for increasing elasticity. A U-shaped leaf spring 6 can be added, and the ends of the inlet and outlet pipes of the corrugated pump barrel are separately clamped on the elastic frame On both ends, the inlet and outlet pipes can be equipped with film tube type or knife chip type check valves. The front section of the inlet tube that contacts the human body may be a soft tube, and the rear section connected to the corrugated pump barrel is a hard tube, which will not hurt the human body and control the suction position.

When holding the open "8" elastic frame with your hands, the two ends of the elastic frame are opened, stretching the corrugated pump cylinder to generate negative pressure. When the object to be sucked is released, the elastic frame rebounds and compresses the corrugated pump. Cartridge, press the aspirated liquid into the liquid bag. Repeat this operation to remove the bag when it is full.

The foot charging pump of Fig. 2 is composed of a corrugated pump barrel 9 and a U-shaped elastic frame 11. The upper end of the pump barrel is provided with an inlet pipe 7 and an outlet pipe 8 with a check valve. 0, A coil spring 12 can be added on both sides of the elastic frame to increase the elastic force. In order to reduce the pollution to the corrugated pump during medical operation and reduce the cost of one-time use, a one-time transition suction bottle with a built-in air cushion can be connected to the front end of the inlet pipe. The pedal pump has a large power, can be used for charging and suction, is convenient to switch, and has many uses, for example, it can be used in a vacuum stretcher and a pneumatic hemostatic suit for emergency.

The corrugated pump cylinder of the utility model can be manufactured by a blow molding process, has a low cost, is very healthy, and can be used once. The elastic frame can be made of steel sheet or engineering plastic at one time, and can be used repeatedly. After testing, the suction can reach 0.08 MPa, and the weight is only 60-200 grams, which is especially suitable for on-site first aid and home beds. At present, people attach great importance to the problems of first aid and cross infection, so the utility model has broad application prospects.

Claims

Rights request

1. A bellows-type medical pump, which is composed of an elastic frame and a corrugated pump barrel with inlet and outlet pipes, which is characterized in that: two ends of the corrugated pump barrel with inlet and outlet tubes are respectively clamped on two ends of the elastic frame end.

2. The medical pump according to claim 1, wherein the elastic frame is a figure 8 or a U-shaped opening.

3. The medical pump according to claim 1 or 2, characterized in that: a coil spring is added to both sides of the elastic frame, or a U-shaped leaf spring is added to the lower portion of the elastic frame to increase the elastic force.

4. The medical pump according to any one of claims 1 to 3, characterized in that: an inlet pipe and an outlet pipe at both ends of the corrugated pump barrel are provided with a sleeve film tube type or a knife blade type check valve.

The medical pump according to any one of claims 1 to 4, characterized in that: the outlet pipe is provided with a liquid bag, the front part of the inlet pipe is a soft tube, and the rear part connected to the corrugated pump barrel is hard Quality tube.

The medical pump according to any one of claims 1 to 5, characterized in that: the front end of the inlet pipe is connected with a transition suction bottle with a built-in air cushion.