CN-121971729-A - Multi-pump cooperative control system of artificial heart-lung machine

CN121971729ACN 121971729 ACN121971729 ACN 121971729ACN-121971729-A

Abstract

The invention belongs to the technical field of extracorporeal circulation control, and discloses a multi-pump cooperative control system of an artificial heart-lung machine, which comprises a main circulation loop, an auxiliary recovery loop, a pump set, a parameter acquisition unit and a control unit. The control unit determines the single infusion quantity of the target and controls the recovery pump to carry out repeated infusion according to the infusion flow, the drainage flow, the venous pressure, the blood storage liquid level and the recovery liquid level, the parameters are collected again after the infusion, the infusion condition is judged again, and meanwhile, the infusion control unit enters a limited safety mode when the collection is abnormal. The system is used for the multi-pump cooperative control in the external circulation process of the artificial heart-lung machine body.

Inventors

WANG WEINING
CAI HUILING
XI BIN
YANG FANGPING
WANG HUA
WANG JUN
LI ZHENGCAI
GE SHAOBO
SHEN ZHEN

Assignees

上海赛腾源研医疗科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260403

Claims (10)

1. The multi-pump cooperative control system of the artificial heart-lung machine is characterized by comprising a main circulation loop, an auxiliary recovery loop, a pump set, a parameter acquisition unit and a control unit; The main circulation loop comprises a venous drainage channel, a blood storage unit, a blood treatment channel and an arterial perfusion channel; The auxiliary recovery loop comprises an attraction passage, a recovery temporary storage unit and a feedback passage, wherein the recovery temporary storage unit is independently arranged outside the blood storage unit, and the feedback passage is communicated with the blood storage unit; The parameter acquisition unit comprises a perfusion flow acquisition component arranged on the arterial perfusion channel, a drainage flow acquisition component and a venous pressure acquisition component arranged on the venous drainage channel, a blood storage position acquisition component arranged on the blood storage unit, a recovery liquid level acquisition component arranged on the recovery temporary storage unit and a reflux flow acquisition component arranged on the reflux channel; The control unit is respectively and electrically connected with the pump group and the parameter acquisition unit; The control unit is used for collecting perfusion flow, drainage flow, venous pressure, blood storage liquid level and recovery liquid level according to a preset sampling period, and calculating the rising rate of the blood storage liquid level according to the blood storage liquid level; The control unit is also used for determining a target single-time feedback amount and controlling the recovery pump to execute one-time feedback when the condition that the blood storage level is lower than a preset upper limit level, the rising speed of the blood storage level is not greater than a preset rising speed threshold, the venous pressure is greater than or equal to a preset venous pressure lower limit, the difference blood amount determined by the drainage flow and the perfusion flow is greater than or equal to a preset difference blood amount threshold, and the recovery level is greater than or equal to a preset minimum feedback level; The control unit is also used for accumulating the actual feedback quantity according to the feedback quantity acquired by the feedback quantity acquisition component, and stopping the recovery pump when the actual feedback quantity reaches the target single feedback quantity or the recovery liquid level is lower than the preset minimum feedback liquid level; The control unit is also used for recapturing the perfusion flow, the drainage flow, the venous pressure, the blood storage liquid level and the recovery liquid level after the recovery pump is stopped for a preset stable time, recalculating the rising rate of the blood storage liquid level and the difference blood volume to judge whether the next feedback is executed again, and when the condition is not met, the control unit keeps the recovery pump from stopping the feedback.
2. The multi-pump cooperative control system of an artificial heart-lung machine of claim 1, wherein the blood storage unit is an intravenous blood reservoir and the blood processing path comprises a membrane oxygenator.
3. The multi-pump cooperative control system of an artificial heart-lung machine according to claim 2, wherein the recovery temporary storage unit comprises a degassing cavity and a blood storage cavity which are mutually communicated, the suction passage is communicated with the degassing cavity, the reinfusion passage is communicated with the blood storage cavity, a first unidirectional conduction structure is arranged between the degassing cavity and the blood storage cavity, and a second unidirectional conduction structure is arranged between the blood storage cavity and the reinfusion passage.
4. The cooperative control system for multiple pumps of an artificial heart-lung machine according to claim 3, wherein the drainage adjusting component is a drainage pump or a drainage regulator arranged on the venous drainage channel, and when the drainage adjusting component is a drainage regulator, the drainage flow collecting component is a drainage flow sensor arranged on the venous drainage channel.
5. The multi-pump cooperative control system of an artificial heart-lung machine according to claim 4, wherein the differential blood volume is a blood volume corresponding to a positive portion of a difference between the drainage flow and the perfusion flow within a preset metering period.
6. The multi-pump cooperative control system of an artificial heart-lung machine of claim 5, wherein the blood storage level rise rate is a ratio of a difference between two adjacent blood storage level collection values to a corresponding sampling time interval.
7. The multi-pump cooperative control system of an artificial heart-lung machine according to claim 6, wherein the target single-return amount is a smaller value of the differential blood volume and a preset single-return upper limit.
8. The cooperative control system for multiple pumps of an artificial heart-lung machine according to claim 7, wherein the control unit first determines whether the venous pressure is greater than or equal to a preset lower venous pressure limit when the blood storage level is lower than the preset lower venous pressure limit, controls the drainage adjusting component to increase the drainage flow when the venous pressure is greater than or equal to the preset lower venous pressure limit, and controls the perfusion pump to decrease the perfusion flow and keeps the recovery pump to stop the feedback when the blood storage level is lower than the preset lower venous pressure limit.
9. The cooperative control system of multiple pumps for an artificial heart-lung machine according to claim 8, wherein the control unit immediately stops the recovery pump when the stored blood level is higher than a preset upper limit level or the stored blood level rising rate is higher than the preset rising rate threshold, and re-determines whether to perform the feedback after the stored blood level is again lower than the preset upper limit level and the stored blood level rising rate is not higher than the preset rising rate threshold.
10. The cooperative control system for multiple pumps of an artificial heart-lung machine according to claim 9, wherein the control unit is configured to enter a limited safety mode when any one of the perfusion flow collection unit, the drainage flow collection unit, the venous pressure collection unit, the blood storage level collection unit, the recovery liquid level collection unit and the reflux flow collection unit is free of output signals, or any one of the collection values exceeds a corresponding preset effective range, and in the limited safety mode, the control unit stops outputting a reflux control command to the recovery pump and limits a driving change rate of the perfusion pump and the drainage adjustment unit within a preset change rate upper limit.

Description

Multi-pump cooperative control system of artificial heart-lung machine Technical Field The invention belongs to the technical field of extracorporeal circulation control, and particularly relates to a multi-pump cooperative control system of an artificial heart-lung machine. Background In the existing device, the perfusion regulation, the drainage regulation on the main circulation side and the blood return action on the auxiliary recovery side are often controlled respectively, and each channel is communicated structurally, but in operation, local regulation is carried out according to single flow, single liquid level or single pressure parameter. In the actual operation process, the auxiliary recovery blood can be mutually influenced with the drainage quantity, the perfusion quantity and the change of the blood storage level in the main circulation when entering the blood storage unit, when the recovery blood enters the rhythm and the current state of the main circulation are not matched, the situations of short-time rise of the blood storage level, too fast liquid level change, increase of vein pressure fluctuation and the like easily occur, and when the blood storage level is low, if only the drainage side load is singly increased, the auxiliary recovery circuit and the main circulation circuit are possibly limited by vein side pressure conditions, namely, the auxiliary recovery circuit and the main circulation circuit are not in a simple reflux relation, but have the operation characteristics of mutual coupling of the liquid level, the pressure and the flow. In the prior art, if the regulation is only carried out according to the liquid level height at a certain moment, a certain flow or a single pressure threshold value, the perfusion stability and drainage continuity at the main circulation side and the reinfusion rhythm of the auxiliary recovery blood are difficult to be simultaneously considered, and particularly when the recovery blood continuously enters and the blood storage position is in the changing process, the single parameter control mode is difficult to accurately reflect the real-time receiving state of the main circulation on the auxiliary recovery blood, so that the insufficient matching between the reinfusion action and the main circulation state is easy to be caused. Disclosure of Invention The invention aims to provide a multi-pump cooperative control system of an artificial heart-lung machine, which aims to solve the problems in the background technology. The invention provides a multi-pump cooperative control system of an artificial heart-lung machine, which comprises a main circulation loop, an auxiliary recovery loop, a pump set, a parameter acquisition unit and a control unit, wherein the main circulation loop comprises a venous drainage channel, a blood storage unit, a blood treatment channel and an arterial perfusion channel for completing extracorporeal circulation treatment of blood, the auxiliary recovery loop comprises an attraction channel, a recovery temporary storage unit and a feedback channel, the recovery temporary storage unit is independently arranged outside the blood storage unit, and the blood recovered by the attraction channel firstly enters the recovery temporary storage unit and then is sent into the blood storage unit through the feedback channel. The auxiliary recovery blood is temporarily stored and then returned, so that the recovery blood is not directly and continuously integrated into the main circulation, a buffer process is provided for the auxiliary recovery blood to enter the blood storage unit, and sudden fluctuation of blood storage liquid level and venous pressure is reduced. The pump set comprises a perfusion pump arranged on an arterial perfusion channel, a drainage adjusting component arranged on a venous drainage channel and a recovery pump arranged on a return channel, wherein the perfusion pump is used for maintaining perfusion flow in a main circulation, the drainage adjusting component is used for adjusting drainage flow in the venous drainage channel, the recovery pump is used for sending blood in a recovery temporary storage unit back to a blood storage unit, and the parameter acquisition unit comprises a perfusion flow acquisition component, a drainage flow acquisition component, a venous pressure acquisition component, a blood storage position acquisition component, a recovery liquid level acquisition component and a return flow acquisition component and is used for respectively acquiring operation parameters in the main circulation loop and an auxiliary recovery loop. The control unit is respectively connected with the pump set and the parameter acquisition unit, acquires the perfusion flow, the drainage flow, the venous pressure, the blood storage liquid level and the recovery liquid level according to a preset sampling period, calculates the rising rate of the blood storage liquid level according to the continuous sampling resul