CN2189932Y - External membrance oxygen generator - Google Patents

Abstract

The utility model relates to a membrane oxygenator which is characterized in that the membrane oxygenator which is matched with an outlet of a heat exchanger is composed of air chambers which are arranged on both ends of a capillary membrane layer which is arranged in a casing, and the casing is provided with a joint, a preliminary filling joint and a blood inlet. The capillary membrane hole ends of the capillary membrane layer are respectively communicated with each air chamber, and sealing adhesive layers with the function of sealing are arranged between the capillary membrane hole ends and the air chambers. The air chambers can be formed by adding air chamber covers on both ends. The arranged cross sections of pipes which are inserted with waviness choked flow wires and arranged on the inlet of the casing of the membrane oxygenator have big upper sides and small lower sides. Baffle plates are arranged in end covers of the heat exchanger. The utility model has the advantages of small volume, small red blood cell damage and low manufacture cost.

Description

External membrance oxygen generator

This utility model relates to a kind of oxygenator (artificial lung), particularly a kind of membrane oxygenator.

Nineteen fifty-three Gibbon successfully is applied to spiral cast bubble oxygenator (artificial lung) clinical experiment (document 1: " cardiovascular surgery " Lan Xichun etc., P288.1985. People's Health Publisher).But this bubble oxygenator is to adopt oxygen directly to contact with the blood large tracts of land to make its oxygenate, produces bubble unavoidably, and erythrocyte destroys bigger, easily makes patient suffer from anemia.Gas/blood ratio is excessive, can not adapt to the clinical operation requirement, especially incompatible need the needs by the long period patient with operation, changes oxygenator in the middle of the operation of being everlasting, increase operation risk degree; The oxygenate amount is big inadequately, and the bad phenomenon of oxygenate often appears in the patient of big body weight.Volume is big, manufacturing cost is high.Heat exchanger usually adopts spirally, and blood flows in sinuate pipeline, and hematoclasis is bigger, water first-class and mistake outside pipe, and rate of heat exchange is relatively poor.

The purpose of this utility model is to overcome above-mentioned existing weak point, provides a kind of volume little, the oxygenator that the oxygenate amount is big.

Task of the present utility model is finished in the following manner: be made up of capillary tube rete, air chamber and the air chamber cover, the housing that exchange as vim and vigour with the oxygenator that the heat exchanger outlet place matches, place the two ends of the intravital capillary tube rete of shell that has joint, preliminary filling joint, blood import department to be provided with air chamber, the capillary-pipe film nose end of capillary tube rete communicates with air chamber separately respectively, be provided with the sealant layer of making sealing usefulness therebetween, two ends are added a cover air chamber cover and are formed air chamber;

The cross section that is contained in its arrangement of pipe that is inserted with ripple choked flow silk in the heat exchanger of oxygenator housing import department is big up and small down, is provided with plate washer in the end cap of heat exchanger.

External blood circulation membrane oxygenator according to the said structure composition, there is its arrangement of suitable hole to have certain rules between the capillary-pipe film, be evenly distributed, blood flows outside film, and bigger space is arranged, and is difficult for producing bubble and capillarity, therefore can not stop up the damage hemocyte, be not bullied/restriction of blood ratio, but the long period finish gas exchange, to adapt to long period operation and auxiliary treatment patient's needs.Heat exchanger, logical heat medium in the pipe external blood circulation pipe, blood is cross-flow along the submissive mobile heat medium with stream in pipe of tube wall, and the easy processing of pipe outer wall is bright and clean level and smooth, blood cell is destroyed few.The insertion of choked flow silk makes the liquid flow of heat medium be turbulence state in the pipe, this arrangement breakable layer of pipe flow phenomenon, and this all will improve rate of heat exchange greatly.The plate washer of the termination of heat exchanger makes heat exchanger become round trip by one way, improves heat transfer efficiency.Because the raising of heat transfer efficiency, volume dwindles greatly, has reduced manufacturing cost.

Below with reference to drawings and Examples this utility model is described in further detail

Fig. 1 this utility model example structure sketch map

With reference to Fig. 1 this utility model by the housing 2 that has joint 1 and preliminary filling joint 11 and blood inlet, fluid sealant 3, have the air chamber cover 13 of air inlet pipe and have escape pipe air chamber cover 4, inner core 5, capillary tube rete 6, have shell heat exchanger 9, pipe 8 that blood imports and exports, have that heat medium is imported and exported and the end cap 10 of the heat exchanger of plate washer and form by the end cap 7 ripple choked flow silks 12 of the heat exchanger of plate washer.Capillary tube rete 6 in this embodiment is to use hollow fibre, twists in the housing 2 of packing on the inner core 5 for ease of fixing it is linked up of capillary-pipe film, and is with viscose glue that air chamber cover 4, air chamber cover 13, fluid sealant 3, housing 2 is bonding.Form air chamber 14 by air chamber cover 13 or air chamber cover 4, fluid sealant 3.The housing 9 upper outlet places of blood inlet place and heat exchanger join on the housing 2 of oxygenator, pipe 8 interpolations in the heat exchanger are gone into ripple choked flow silk 12, pipe 8 is arranged in each layer and is respectively five, four, three, two its cross sections and is upside-down triangle shape, and two ends are bonding heat exchanger end cap 10, heat exchanger end cap 7 respectively.

After this membrane oxygenator was access on the heart-lung machine, venous blood entered in the shell heat exchanger 9, carried out heat exchange with the heat medium of managing in 8.Because an effect heat medium entering part pipe 8 of 10 li plate washers of heat exchanger end cap, heat medium enters another part pipe 8 after heat exchanger end cap 10 outflow heat exchanger shells 9 under 7 li plate washer effects of end cap.Heated blood is discharged the air that is about in the oxygenator with the normal saline of the preliminary filling of the inside by preliminary filling joint 11 and is drained by entering under the effect of blood pump in the membrane oxygenator housing 2.Put into purity oxygen or gas oxygen gas mixture simultaneously and go into the capillary-pipe film 6 of oxygenator.Because diffusion oxygen, carbon dioxide reach balance after the film disperse, thereby finish the exchange of oxygen and carbon dioxide, the blood of finishing oxygenate enters human body from joint 1.This oxygenator can enter the partial pressure of oxygen and the partial pressure of carbon dioxide in the blood how much adjusted of capillary membrane gas by adjustment.

Claims (2)

1, a kind of oxygenator that comprises, the external blood circulation membrane oxygenator of heat exchanger is characterized in that oxygenator is contained in the heat exchanger outlet place, said oxygenator is by the capillary tube rete (6) as the vim and vigour exchange, air chamber (14) and have the air chamber cover (4) of escape pipe, take the air chamber cover (13) of trachea out of, fluid sealant (3), housing (2) is formed, place and have joint (1), the two ends capillary-pipe film nose end of the capillary tube rete (6) in the housing (2) of preliminary filling joint (11) and blood inlet communicates with air chamber (14) separately respectively, be provided with the fluid sealant (3) of making sealing usefulness therebetween, two ends are distinguished the air chamber cover (13) of cover tape air inlet pipe and are had the air chamber cover (4) of escape pipe.

2, it is characterized in that as the said external blood circulation membrane oxygenator of claim 1 pipe (8) in the housing (9) of the heat exchanger that housing (2) upper inlet with oxygenator matches is inserted with ripple choked flow silk (12), the cross section that pipe (8) is arranged is big up and small down, cover the heat exchanger two ends bring outlet end cap (10) into and another end cap (7) lining is provided with plate washer.

Images