CN-121987867-A - Intelligent negative pressure drainage system and method for self-adaptive closed-loop pressure regulation

CN121987867ACN 121987867 ACN121987867 ACN 121987867ACN-121987867-A

Abstract

The invention relates to the technical field of negative pressure drainage, and discloses an intelligent negative pressure drainage system and method for self-adaptive closed-loop pressure regulation, wherein the system comprises a flexible drainage cavity body, a liquid collecting cavity and a liquid collecting cavity, wherein the flexible drainage cavity body is used for collecting exudates; the negative pressure pump module is used for providing negative pressure for the negative pressure drainage system, the drainage monitoring module is used for monitoring drainage data of the flexible drainage cavity and the drainage pipeline in real time, and the control module is used for determining the working state of the negative pressure drainage system according to the drainage data and controlling the negative pressure pump module according to the working state. The invention realizes the intellectualization, individuation and high safety of the negative pressure drainage process.

Inventors

DING YIYANG
HUANG JIAN
Tong huan

Assignees

金华市晨曦医疗器械有限公司

Dates

Publication Date: 20260508
Application Date: 20260202

Claims (10)

1. An intelligent negative pressure drainage system with adaptive closed-loop pressure regulation, the system comprising: the flexible drainage cavity is used for collecting exudates; the outlet of the drainage pipeline is connected with the flexible drainage cavity; The air inlet of the negative pressure pump module is connected with the air extraction opening of the flexible drainage cavity and is used for providing negative pressure for the negative pressure drainage system; The drainage monitoring module is arranged on the flexible drainage cavity and the drainage pipe, and is used for monitoring drainage data of the flexible drainage cavity and the drainage pipe in real time, wherein the drainage data comprise pressure data, liquid level data and impedance data; The control module is connected with the negative pressure pump module and the drainage monitoring module, and is used for receiving the drainage data, determining the working state of the negative pressure drainage system according to the drainage data and controlling the negative pressure pump module according to the working state.
2. The intelligent negative pressure drainage system of self-adaptive closed-loop pressure regulation according to claim 1, wherein the drainage monitoring module comprises a pressure sensor, an impedance sensor and a liquid level sensor, wherein the pressure sensor is arranged at the inlet of the drainage pipeline and is used for detecting pressure data at the inlet of the drainage pipeline; The impedance sensor is arranged at the middle section of the drainage pipeline and used for detecting impedance data at the middle section of the drainage pipeline, and the impedance data comprise an impedance value and a phase angle; The liquid level sensor is arranged at the upper part of the flexible drainage cavity and is used for detecting liquid level data of the flexible drainage cavity.
3. The adaptive closed-loop pressure regulated intelligent negative pressure drainage system of claim 2, wherein the control module comprises: a pipeline pre-detection unit configured to judge whether the drainage pipeline is unobstructed according to the pressure data and the impedance data; A exudate identification unit configured to determine an exudate type from the impedance data; A line blockage judging unit configured to judge whether blockage of the drainage line occurs according to the exudate type and pressure data; The pressure adjusting unit is configured to perform primary adjustment on the control parameters of the negative pressure pump module according to the type of the effusion, and perform secondary adjustment on the control parameters of the negative pressure pump module when the drainage pipeline is judged to be blocked; And the overflow early warning unit is configured to judge whether the flexible drainage cavity has an overflow risk according to the liquid level data, and if so, overflow early warning is carried out.
4. The intelligent negative pressure drainage system of claim 3, wherein the pipeline pre-inspection unit determines whether the drainage pipeline is unobstructed according to the pressure data and the impedance data, comprising: The pipeline pre-detection unit controls the negative pressure pump module to perform pre-detection operation, acquires pressure data and impedance data during the pre-detection operation, and determines the pressure change rate during the pre-detection operation according to the pressure data; a pressure change threshold value, a gas impedance interval and a liquid impedance interval are preset; Comparing the pressure change rate with a pressure change threshold value, and respectively comparing the impedance value with the gas impedance section and the liquid impedance section; If the pressure change rate is greater than or equal to the pressure change threshold value and the impedance value is in the gas impedance interval, judging that the drainage pipeline is empty and smooth; if the pressure change rate is greater than or equal to the pressure change threshold value and the impedance value is in the liquid impedance interval, judging that the drainage pipeline is connected with the effusion and is unblocked; And if the pressure change rate is smaller than the pressure change threshold value and the impedance value is in the gas impedance interval, judging that the drainage pipeline is not opened.
5. The intelligent negative pressure drainage system of adaptive closed-loop pressure regulation of claim 4, wherein the exudate identification unit determines the type of exudate from the impedance data comprises: setting a first impedance value, a second impedance value, a first phase angle and a second phase angle, wherein the first impedance value is smaller than the second impedance value, and the first phase angle is smaller than the second phase angle; Judging the type of the exudates according to the relation between the impedance value and the first and second impedance values and the relation between the phase angle and the first and second phase angles; if the impedance value is smaller than the first impedance value and the phase angle is smaller than the first phase angle, judging that the type of the exudates is clear exudates; If the impedance value is greater than or equal to the first impedance value and the impedance value is less than or equal to the second impedance value, and the phase angle is greater than or equal to the first phase angle and the phase angle is less than or equal to the second phase angle, judging that the type of the exudates is bloody high protein exudates; If the impedance value is greater than the second impedance value and the phase angle is greater than the second phase angle, judging that the type of the exudates is purulent cell-containing debris exudates; And when judging that the type of the exudates is purulent cell-containing fragment exudates, acquiring the pH value of the exudates, judging whether the exudates are alkaline, and if so, determining that the type of the exudates is purulent cell-containing fragment exudates.
6. The intelligent negative pressure drainage system of adaptive closed-loop pressure regulation of claim 5, wherein the pipeline blockage judging unit judges whether the drainage pipeline is blocked according to the exudate type and pressure data, comprising: Presetting a first pressure value and a second pressure value, wherein the first pressure value is smaller than the second pressure value; when the type of the effusion is clear effusion, judging that the drainage pipeline is not blocked; when the type of the exudates is hemorrhagic high protein exudates and the pressure data is smaller than the first pressure value, judging that the drainage pipeline is blocked, otherwise, judging that the drainage pipeline is not blocked; And when the type of the effusion is purulent cell debris effusion, and the pressure data is smaller than the second pressure value, judging that the drainage pipeline is blocked, otherwise, judging that the drainage pipeline is not blocked.
7. The intelligent negative pressure drainage system of adaptive closed-loop pressure regulation according to claim 6, wherein the pressure regulation unit performs one-time regulation of the control parameters of the negative pressure pump module according to the exudate type, comprising: a basic target negative pressure value is arranged in the pressure regulating unit; an effusion type correction comparison table is arranged in the pressure regulating unit, and comprises effusion types and corresponding correction coefficients thereof; Screening the exudates comparison table based on the exudates types, determining corresponding correction coefficients, adjusting basic target negative pressure values once based on the correction coefficients, and setting the product of the basic target negative pressure values and the correction coefficients as the negative pressure values after one-time adjustment; and controlling the pump rotating speed of the negative pressure pump module based on the negative pressure value after one-time adjustment.
8. The intelligent negative pressure drainage system of claim 7, wherein the pressure regulation unit performs secondary regulation on the control parameter of the negative pressure pump module when it is determined that the drainage pipeline is blocked, and the system comprises: When the drainage pipeline is judged to be blocked, determining a blocking state according to the relation between the impedance data and the gas impedance interval and the liquid impedance interval, and determining the duration of the corresponding blocking state, wherein the blocking state is determined to be close to the blocking state if the impedance value is larger than the maximum value of the liquid interval and smaller than the minimum value of the gas impedance interval; Setting a negative pressure upper limit value, a negative pressure lower limit value and a duration threshold value, and when the drainage pipeline is in a state of being close to blockage and the duration is longer than or equal to the duration threshold value, regulating the pump rotation speed of the negative pressure pump module according to the negative pressure upper limit value and keeping the regulating duration; and if the drainage pipeline is in a blocked state and the duration time is greater than or equal to the duration time threshold, regulating the pump rotating speed of the negative pressure pump module according to the negative pressure lower limit value, and keeping the regulating time.
9. The intelligent negative pressure drainage system of self-adaptive closed-loop pressure regulation according to claim 3, wherein the overflow early warning unit judges whether the flexible drainage cavity has an overflow risk according to the liquid level data, and if so, overflow early warning is performed, comprising: the liquid level threshold is preset, the liquid level data is compared with the liquid level threshold, if the liquid level data is larger than or equal to the liquid level threshold, the overflow risk of the flexible drainage cavity is judged, and overflow early warning is carried out.
10. An intelligent negative pressure drainage method of self-adaptive closed-loop pressure regulation, which is applied to an intelligent negative pressure drainage system of self-adaptive closed-loop pressure regulation as claimed in any one of claims 1 to 9, and is characterized in that the method comprises the following steps: Controlling the negative pressure pump module to provide negative pressure for the drainage pipeline and the flexible drainage cavity for drainage; monitoring drainage data of the flexible drainage cavity and the drainage pipeline in real time, wherein the drainage data comprises pressure data, liquid level data and impedance data; And determining the working states of the flexible introducing cavity and the drainage pipeline according to the drainage data, and controlling the negative pressure pump module according to the working states.

Description

Intelligent negative pressure drainage system and method for self-adaptive closed-loop pressure regulation Technical Field The invention relates to the technical field of negative pressure drainage, in particular to an intelligent negative pressure drainage system and method for self-adaptive closed-loop pressure regulation. Background The negative pressure drainage technology is widely applied to the fields of wound surface management after surgical operation, chronic wound nursing, wound treatment and the like, and is characterized in that the controllable negative pressure is continuously or intermittently applied to promote tissue fluid discharge, improve local microcirculation and accelerate granulation tissue formation, so that wound healing is accelerated. The traditional negative pressure drainage system mostly adopts fixed negative pressure setting, and lacks the sensing and response capability to dynamic change in the drainage process. In clinical practice, the characteristics of patient exudates (such as clear exudates, bloody high protein exudates or purulent cell-containing debris exudates) are significantly different, and the drainage tube is partially or completely blocked by clots, tissue debris or viscous secretions, and meanwhile, the drainage cavity fluid level is continuously raised to have a overflowing risk, so that infection or equipment failure can be caused. In the prior art, although partial systems introduce pressure sensors to realize basic negative pressure feedback control, the defects generally exist that (1) the state of a pipeline is judged only by single pressure parameters, complex working conditions such as no-load, normal drainage, blockage and the like cannot be distinguished, (2) the recognition capability of exudate types is lacking, negative pressure strategies are difficult to dynamically adjust according to different liquid characteristics, (3) when the pipeline is about to be blocked or is blocked, the active intervention mechanism is lacking, drainage interruption or tissue damage is easy to be caused, and (4) the liquid level monitoring and early warning functions are not integrated, so that potential safety hazards of liquid overflow exist. Therefore, a closed-loop control system capable of sensing multidimensional drainage states in real time, intelligently identifying the types of exudates, adaptively adjusting negative pressure parameters and having blocking early warning and processing capacity is needed, so that the safety, effectiveness and intelligent level of negative pressure drainage are improved. Disclosure of Invention The invention aims to provide an intelligent negative pressure drainage system and method for self-adaptive closed-loop pressure regulation, and aims to solve one or more of the problems. The invention provides an intelligent negative pressure drainage system with self-adaptive closed-loop pressure regulation, which comprises: the flexible drainage cavity is used for collecting exudates; the outlet of the drainage pipeline is connected with the flexible drainage cavity; The air inlet of the negative pressure pump module is connected with the air extraction opening of the flexible drainage cavity and is used for providing negative pressure for the negative pressure drainage system; The drainage monitoring module is arranged on the flexible drainage cavity and the drainage pipe, and is used for monitoring drainage data of the flexible drainage cavity and the drainage pipe in real time, wherein the drainage data comprise pressure data, liquid level data and impedance data; The control module is connected with the negative pressure pump module and the drainage monitoring module, and is used for receiving the drainage data, determining the working state of the negative pressure drainage system according to the drainage data and controlling the negative pressure pump module according to the working state. Preferably, the drainage monitoring module comprises a pressure sensor, an impedance sensor and a liquid level sensor, wherein the pressure sensor is arranged at the inlet of the drainage pipeline and is used for detecting pressure data at the inlet of the drainage pipeline; The impedance sensor is arranged at the middle section of the drainage pipeline and used for detecting impedance data at the middle section of the drainage pipeline, and the impedance data comprise an impedance value and a phase angle; The liquid level sensor is arranged at the upper part of the flexible drainage cavity and is used for detecting liquid level data of the flexible drainage cavity. Preferably, the control module includes: a pipeline pre-detection unit configured to judge whether the drainage pipeline is unobstructed according to the pressure data and the impedance data; A exudate identification unit configured to determine an exudate type from the impedance data; A line blockage judging unit configured to judge whether blockage of the drainage line occurs