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CN-121987866-A - Thoracic and abdominal cavity drainage catheter integrated with real-time pressure monitoring function and monitoring method thereof

CN121987866ACN 121987866 ACN121987866 ACN 121987866ACN-121987866-A

Abstract

The invention relates to a pleuroperitoneal cavity drainage catheter integrating a real-time pressure monitoring function and a monitoring method thereof, belonging to the technical field of medical appliances, and comprising the following steps of S1, setting a drainage monitoring device which comprises a drainage catheter, an internal pressure sensor, an external pressure sensor and an annular piezoelectric film; the system can synchronously extract the envelopes of two paths of pressure signals through a sensing component formed by the built-in pressure sensor and the external pressure sensor. When the patient generates integral pressure deflection due to respiration or turning over, the controller uses differential self-adaptive logic to cancel out the common mode noise with high synchronism. The monitoring mode based on physical position opposite flushing ensures that the retained pressure signal is real dynamic pressure information in the pipe, and the monitoring accuracy is remarkably improved.

Inventors

  • CHEN SHIBIN
  • LIN QIULIAN
  • He Haiju
  • CHEN XINGQIN

Assignees

  • 广东益德医疗科技有限公司

Dates

Publication Date
20260508
Application Date
20260127

Claims (9)

  1. 1. The utility model provides a thoracic and abdominal cavity drainage catheter monitoring method integrating real-time pressure monitoring function, which is characterized by comprising the following steps: S1, a drainage monitoring device is arranged and comprises a drainage catheter (100), an internal pressure sensor (210), an external pressure sensor (220) and an annular piezoelectric film (300), wherein the internal pressure sensor (210) is arranged at the front end in the body of the drainage catheter (100), the external pressure sensor (220) is arranged at the tail end in the body of the drainage catheter (100), the annular piezoelectric film (300) is sleeved on the periphery of a packaging structure of the internal pressure sensor (210), and the internal pressure sensor (210) and the external pressure sensor (220) are both positioned in a fluid pressure field of the drainage catheter (100); S2, starting self-cleaning, driving the annular piezoelectric film (300) to generate high-frequency ultrasonic micro-vibration, and forming a hydrodynamic layer on the sensing surface of the built-in pressure sensor (210) so as to prevent fibrin and blood platelets in drainage liquid from adhering to the surface of the sensor; S3, acquiring pressure signals obtained by the built-in pressure sensor (210) and the external pressure sensor (220) in real time, wherein the sampling frequency of the pressure signals is a preset frequency; S4, differential self-adaptive processing is carried out, differential dynamic components between signals of the internal pressure sensor (210) and the external pressure sensor (220) are extracted, environmental noise interference is filtered through analysis of pressure gradient changes, and real-time states of drainage pipelines are identified.
  2. 2. The method for monitoring the pleuroperitoneal cavity drainage catheter integrated with the real-time pressure monitoring function according to claim 1, wherein the step S2 is characterized in that S2.1 is used for inputting driving current to the annular piezoelectric film (300) and performing on-line self-cleaning on the surface of the built-in pressure sensor (210) by utilizing an ultrasonic cavitation effect, and S2.2 is used for setting the excitation frequency of the high-frequency ultrasonic micro-vibration to avoid the human auditory frequency range and tissue resonance points.
  3. 3. The method for monitoring the pleuroperitoneal cavity drainage catheter integrated with the real-time pressure monitoring function according to claim 1, wherein the step S4 comprises the steps of S4.1 of synchronously extracting pressure signal envelopes of the internal pressure sensor (210) and the external pressure sensor (220), S4.2 of judging instantaneous pressure noise generated by patient position change or respiration and executing filtering operation when two groups of pressure signals synchronously generate envelope changes, and S4.3 of calculating a pressure gradient between the internal pressure sensor (210) and the external pressure sensor (220), and judging that the drainage catheter (100) is blocked or folded when the pressure gradient is suddenly changed.
  4. 4. The method for monitoring the pleuroperitoneal cavity drainage catheter integrated with the real-time pressure monitoring function according to claim 1, wherein the step S3 is preceded by monitoring the viscosity of the drainage liquid in the drainage catheter (100) in real time and performing closed-loop self-adaptive adjustment on negative pressure adjusting equipment according to the viscosity and the intra-cavity real-time pressure.
  5. 5. A pleuroperitoneal cavity drainage catheter integrating a real-time pressure monitoring function, which is applied to the pleuroperitoneal cavity drainage catheter monitoring method integrating the real-time pressure monitoring function as claimed in any one of claims 1 to 4, and is characterized by comprising the following steps: A drainage catheter (100) with an external diameter which meets the preset size standard and is used for drainage of effusion in the pleuroperitoneal cavity; The sensing assembly comprises an internal pressure sensor (210) and an external pressure sensor (220), wherein the internal pressure sensor (210) is arranged at the inner side of the front end body of the drainage catheter (100), and the external pressure sensor (220) is arranged at the outer side of the tail end body of the drainage catheter (100); The self-cleaning component is an annular piezoelectric film (300) integrated on the periphery of the packaging structure of the built-in pressure sensor (210); The controller is respectively connected with the sensing component and the self-cleaning component, and is used for executing differential self-adaptive logic and driving the annular piezoelectric film (300), and the flow monitoring unit is connected with the controller and is used for acquiring the discharge amount of drainage liquid in unit time so as to provide data input for the controller to calculate the real-time viscosity of the drainage liquid.
  6. 6. The pleuroperitoneal cavity drainage catheter integrated with the real-time pressure monitoring function according to claim 5, wherein the internal pressure sensor (210) and the external pressure sensor (220) are miniature MEMS sensors or optical fiber sensors.
  7. 7. The pleuroperitoneal cavity drainage catheter integrated with real-time pressure monitoring function according to claim 5, wherein the annular piezoelectric film (300) is made of polyvinylidene fluoride PVDF.
  8. 8. The pleuroperitoneal cavity drainage catheter integrated with the real-time pressure monitoring function according to claim 5, wherein the thickness of a monitoring module of the built-in pressure sensor (210) is matched with the thickness of a catheter wall of the drainage catheter (100), and the whole drainage catheter (100) passes biocompatibility verification.
  9. 9. The pleuroperitoneal cavity drainage catheter integrated with real-time pressure monitoring function according to claim 5, wherein the controller extracts a pressure gradient between the internal pressure sensor (210) and the external pressure sensor (220) as an objective indicator for determining the patency of a pipeline.

Description

Thoracic and abdominal cavity drainage catheter integrated with real-time pressure monitoring function and monitoring method thereof Technical Field The invention relates to the field of medical equipment, in particular to a pleuroperitoneal cavity drainage catheter integrated with a real-time pressure monitoring function and a monitoring method thereof. Background In the process of hydrothorax and abdominal cavity effusion treatment in clinical medicine, a drainage catheter is a core instrument for implementing effusion evacuation, relieving organ compression and maintaining pleural cavity physiological pressure. Traditional drainage devices generally rely on an external gravity meter or a mechanical pressure meter for rough monitoring, and the monitoring precision and response speed of the drainage devices are difficult to meet the requirements of modern precise nursing. In the actual clinical operation process, the drainage system is in a complex biological fluid environment for a long time and is under the interactive influence of physiological dynamic fluctuation of a patient, so that monitoring failure is very easy to occur. There are significant limitations to single sensor monitoring. In the prior art, a single pressure sensing point is adopted, but in the effusion drainage process, the physiological behaviors of a patient such as respiratory action, body position turning and cough can generate obvious background pressure noise. The noise is often interwoven with the real drainage pressure, so that the collected pressure signal cannot truly reflect the flow state in the pipeline, and false early warning is easily caused; Sensing accuracy degradation due to biological component adhesion is a common problem in the industry. Because the drainage fluid contains a large amount of fibrin, blood platelets and possible blood clot components, the biomacromolecules are extremely easy to physically accumulate and chemically adhere on the sensing surface of the sensor. Such deposition phenomena can cause displacement of the sensing diaphragm to be blocked, so that serious zero drift or sensitivity reduction of the pressure signal occurs, and even the sensor completely loses the sensing capability of tiny pressure change; The existing drainage device lacks predictability in coping with the change of the physical state of the pipeline. When the drainage catheter is folded, bent or blocked by small fibrous tissue parts in a hidden way, medical staff can only judge faults afterwards by observing the stop and increase of the liquid level in the drainage bottle due to the lack of quantitative analysis on the hydrodynamic characteristics of the two ends of the catheter. This hysteresis not only increases the risk of patient lung collapse or infection, but also places clinical care in a passive state of treatment; The existing negative pressure suction equipment often maintains constant suction strength and cannot be flexibly adjusted according to the dynamic evolution of the physical characteristics of drainage liquid. When the viscosity of the drainage liquid is increased due to pathological reasons, the constant negative pressure is difficult to overcome the rapid flow resistance, so that the drainage efficiency is reduced, and a high-reliability technical means capable of cooperatively linking the real-time physical state of the drainage pipeline with a power source is not available at present. The above information disclosed in the background section is only for enhancement of understanding of the background of the disclosure and therefore it may include information that does not form the prior art that is already known to those of ordinary skill in the art. Disclosure of Invention The invention aims to provide a pleuroperitoneal cavity drainage catheter integrated with a real-time pressure monitoring function and a monitoring method thereof, so as to solve the problems in the background art, and specifically, the invention has the following technical scheme: A method for monitoring a pleuroperitoneal cavity drainage catheter integrating a real-time pressure monitoring function, comprising the following steps: S1, setting a drainage monitoring device, wherein the drainage monitoring device comprises a drainage catheter, an internal pressure sensor, an external pressure sensor and an annular piezoelectric film, the internal pressure sensor is arranged at the inner front end of the drainage catheter, the external pressure sensor is arranged at the outer tail end of the drainage catheter, the annular piezoelectric film is sleeved on the periphery of a packaging structure of the internal pressure sensor, and the internal pressure sensor and the external pressure sensor are both positioned in a fluid pressure field of the drainage catheter; S2, starting self-cleaning, driving the annular piezoelectric film to generate high-frequency ultrasonic micro-vibration, and forming a hydrodynamic layer on the sensing surface of