CN102393186B

CN102393186B - Method for measuring clearance between rolling pump groove and rolling shaft in real time

Info

Publication number: CN102393186B
Application number: CN 201110251287
Authority: CN
Inventors: 任万滨; 田勇; 丁巾; 周连科
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2011-08-30
Filing date: 2011-08-30
Publication date: 2013-09-18
Anticipated expiration: 2031-08-30
Also published as: CN102393186A

Abstract

The invention provides a method for measuring a clearance between a rolling pump groove and a rolling shaft in real time and relates to a method for measuring a clearance between a pump groove and a rolling shaft, and the method is used for solving the problems that the blood recycling quality grade is influenced and the safety and reliability of an autologous blood recycling technology and an extracorporeal circulation technology are poor because no implementation method for measuring the clearance between the rolling pump groove and the rolling pump exists in the prior art. The method comprises the following steps: fixing a pressure sensor on the outer side wall of a pump pipe; regulating the clearance between the rolling pump groove and the rolling shaft to be 2mm; starting a rolling pump and recording the maximum pressure value of the pressure sensor; sequentially recording the maximum pressure values of the pressure sensor when the clearance between the rolling pump groove and the rolling shaft is 2.1mm, 2.2ellipsis2.9mm; establishing a relation curve of a static clearance and pressure and then recording the relation curve into a singlechip program of the pressure sensor; andmeasuring the clearance between the rolling pump groove and the rolling shaft in real time through a singlechip in which the relation curve is recorded. The method provided by the invention is used for measuring the clearance between the rolling pump groove and the rolling shaft in real time.

Description

The method of a kind of real-time measurement occlusion pump pump groove and rolling shaft gap

Technical field

The present invention relates to a kind of method of measuring occlusion pump pump groove and rolling shaft gap.

Background technology

Adopt occlusion pump and centrifugal pump to carry, collect blood and have the advantages such as simple to operate, that expense is low, so occlusion pump and centrifugal pump are widely used in the blood pump system of the Medical Instruments such as blood recovery system, cardiopulmonary bypass unit, haemodialysis.

Referring to Figure of description 2, regulating pump head 5 rotates around the shaft, setting nut 2 on the adjusting pump head can change the mechanical presses power of the 3 pairs of medical grade silicon rubber pump lines 1 of rolling shaft in the occlusion pump, there is increase tendency in occlusion pump pump groove 4 with rolling shaft 3 gaps in the clinical practice use procedure, cause the roll extrusion power of occlusion pump not enough, thereby reduced the occlusion pump flow, when occlusion pump pump groove 4 is too small with rolling shaft 3 gaps simultaneously, occlusion pump constantly rolls medical grade silicon rubber pump line 1, has increased the damage of blood rbc in the pump line; Because occlusion pump pump groove and rolling shaft gap only have 2～3mm, only can't accurately judge the size of occlusion pump pump groove and rolling shaft gap with naked eyes, therefore need to measure in real time occlusion pump pump groove and rolling shaft gap, at present, occlusion pump pump groove and rolling shaft gap are regulated full working experience with the operator, there is not accurate data that the foundation of regulating the gap is provided, generalized case menisectomy Instrumental abnormal conditions occur and just can pinpoint the problems, not only affect the grade that blood reclaims quality, also reduced from body blood recovery technology, Cardiopulmonary Bypass is at the safety and reliability of clinical practice.

To sum up, do not implement at present to measure the method for occlusion pump pump groove and rolling shaft gap, the grade that not only affects blood recovery quality has also reduced from body blood recovery technology, the Cardiopulmonary Bypass safety and reliability in clinical practice.

Summary of the invention

The present invention is for solving the method for not implementing to measure at present occlusion pump pump groove and rolling shaft gap, affect that blood reclaims quality grade and from body blood recovery technology, Cardiopulmonary Bypass in the poor problem of the safety and reliability of clinical practice, and then provide the method for a kind of real-time measurement occlusion pump pump groove and rolling shaft gap.

The method of real-time measurement occlusion pump pump groove of the present invention and rolling shaft gap realizes according to following steps:

Step 1, at first the blood in the medical grade silicon rubber pump line is emptied, then pressure transducer is fixed on the lateral wall of medical grade silicon rubber pump line by bundling belt, guarantee the constant pressure between pressure transducer and the medical grade silicon rubber pump line during binding;

Setting nut on step 2, the adjustment roll press pump, making occlusion pump pump groove and rolling shaft gap is 2mm;

Step 3, unlatching occlusion pump, setting the recycling machine blood flow is 400～600ml/min, the maximum pressure value of record pressure transducer is closed occlusion pump;

Step 4, repeating step two and step 3, the maximum pressure value of pressure transducer when recording successively occlusion pump pump groove and rolling shaft gap and being 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm;

Step 5, record the relation curve that a series of maximum pressure values are set up static clearance and pressure according to step 4, the relation curve of static clearance and pressure is counted in the Single Chip Microcomputer (SCM) program of pressure transducer;

Open occlusion pump in step 6, the clinical practice use procedure, measure in real time gap between occlusion pump pump groove and the rolling shaft by the single-chip microcomputer that counts relation curve.

The present invention has following beneficial effect:

The method of real-time measurement occlusion pump pump groove of the present invention and rolling shaft gap counts the relation curve of static clearance and pressure in the Single Chip Microcomputer (SCM) program of pressure transducer, measure in real time gap between occlusion pump pump groove and the rolling shaft by the single-chip microcomputer that counts relation curve, accurately real time data provides foundation for the gap between timely adjustment roll press pump pump groove and the rolling shaft, the damage of blood rbc in the pump line when having avoided the gap too small has improved blood and has reclaimed quality; Not enough and the reduction occlusion pump flow of the roll extrusion power of occlusion pump when also having avoided simultaneously occlusion pump pump groove and rolling shaft gap excessive has improved from body blood recovery technology, the Cardiopulmonary Bypass safety and reliability in clinical practice.

Description of drawings

Fig. 1 is pressure transducer and the outside process flow diagram that is connected in the specific embodiment of the present invention one, and Fig. 2 is that the master of occlusion pump looks schematic diagram.

Embodiment

Embodiment one: shown in Fig. 1～2, it is as follows that present embodiment is measured the method step of occlusion pump pump groove and rolling shaft gap in real time:

Step 1, at first the blood in the medical grade silicon rubber pump line 1 is emptied, then pressure transducer is fixed on the lateral wall of medical grade silicon rubber pump line by bundling belt, guarantee the constant pressure between pressure transducer and the medical grade silicon rubber pump line 1 during binding;

Setting nut 2 on step 2, the adjustment roll press pump, making occlusion pump pump groove 4 and rolling shaft 3 gaps is 2mm;

Step 4, repeating step two and step 3, the maximum pressure value of pressure transducer when recording successively occlusion pump pump groove 4 and being 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm with rolling shaft 3 gaps;

Gap between the groove 4 of occlusion pump pump described in step 2 and the step 4 and the rolling shaft 3 is static clearance; Gap between the pump of occlusion pump described in step 6 groove 4 and the rolling shaft 3 is dynamic clearance.

When occlusion pump pump groove 4 and rolling shaft 3 gaps exceeded 2.1～2.9mm, the audible-visual annunciator that is connected with single-chip microcomputer was reported to the police.

Embodiment two: the pressure in the present embodiment step 1 between pressure transducer and the medical grade silicon rubber pump line 1 is 30kpa.This pressure is be used to the benchmark of setting up static clearance and pressure Relations Among, and numerical value is the linear sensitizing range of pressure transducer, can guarantee the linearity that is changed to that pressure occurs under this benchmark.Other is identical with embodiment one.

Embodiment three: the recycling machine blood flow is 500ml/min in the present embodiment step 3.This flow is the normality value of blood recovery system liquid roller pump job applications, with this value measure relation between static clearance and the pressure will make dynamic clearance in the actual clinical operating process determine more accurate.Other is identical with embodiment one.

Claims

1. method of measuring in real time occlusion pump pump groove and rolling shaft gap, the method step that it is characterized in that measuring in real time occlusion pump pump groove and rolling shaft gap is as follows:

Step 1, at first that medical grade silicon rubber pump line (1) is interior blood empty, then pressure transducer is fixed on the lateral wall of medical grade silicon rubber pump line by bundling belt, guarantees the constant pressure between pressure transducer and the medical grade silicon rubber pump line (1) during binding;

Setting nut (2) on step 2, the adjustment roll press pump, making the static clearance between occlusion pump pump groove (4) and the rolling shaft (3) is 2 ㎜;

Step 4, repeating step two and step 3, the maximum pressure value of pressure transducer when recording successively static clearance between occlusion pump pump groove (4) and the rolling shaft (3) and being 2.1 ㎜, 2.2 ㎜, 2.3 ㎜, 2.4 ㎜, 2.5 ㎜, 2.6 ㎜, 2.7 ㎜, 2.8 ㎜, 2.9 ㎜;

Open occlusion pump in step 6, the clinical practice use procedure, measure in real time dynamic clearance between occlusion pump pump groove and the rolling shaft by the single-chip microcomputer that counts relation curve.

2. the method for a kind of real-time measurement occlusion pump pump groove according to claim 1 and rolling shaft gap, it is characterized in that: the pressure in the step 1 between pressure transducer and the medical grade silicon rubber pump line (1) is 30kpa.

3. the method for a kind of real-time measurement occlusion pump pump groove according to claim 1 and 2 and rolling shaft gap, it is characterized in that: the recycling machine blood flow is 500ml/min in the step 3.