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CN-122003258-A - Negative pressure control urine drainage system and method

CN122003258ACN 122003258 ACN122003258 ACN 122003258ACN-122003258-A

Abstract

A negative pressure control urine drainage system and method, the system includes the guardian equipment (10) and supporting drainage material, can empty the urine that is detained in bladder or drainage tube regularly, and calculate the true urine volume that the patient produced in the predetermined period, improve the accuracy of urine volume measurement in the unit time, provide the credible monitoring data for AKI, and reduce stifled pipe and urinary tract infection risk.

Inventors

  • RUAN XUEHONG
  • CHEN XULIANG
  • YANG HONGZHANG
  • Dai sha
  • CUI WEIWEI
  • ZHANG DAN
  • RUAN DONGYAO

Assignees

  • 西安汇智医疗集团有限公司

Dates

Publication Date
20260508
Application Date
20241017
Priority Date
20240820

Claims (10)

  1. A system comprises monitoring equipment 10 and matched drainage materials, wherein the monitoring equipment 10 comprises a control main board, a negative pressure generator, a pressure sensor, a urine metering device 30 and a human-computer interaction interface 11, the matched drainage materials comprise an adapter 40, a drainage tube 50, a negative pressure suction cavity 60, a negative pressure suction tube 70 and a urine collector 80, and the system is characterized in that the negative pressure generator of the monitoring equipment 10 is a negative pressure device for providing a vacuum environment for the inside of the matched drainage materials, the pressure sensor dynamically matches the pressure value in the drainage materials, the urine metering device 30 dynamically monitors the urine volume discharged by a patient, the matched drainage materials are special consumable materials of a special machine matched with the monitoring equipment 10, the negative pressure suction cavity 60 is a hollow cavity which is arranged between the drainage tube 50 and the urine collector 80 and is provided with pipeline interfaces, the negative pressure suction cavity 60 is provided with 3 pipeline interfaces, one pipeline interface is communicated with the drainage tube 50 at the upstream of the urine collector 80, one interface is communicated with a liquid inlet of the downstream urine collector 80, and the other interface is connected with the negative pressure suction tube 70.
  2. A system according to claim 1 wherein the urine metering device 30 includes, but is not limited to, an ultrasonic liquid flow meter, a photo-induced drip rate sensor, a turbine liquid flow meter, a gravity sensor, and a tension sensor.
  3. A system according to claim 1, wherein a combination of a photo-sensing drip rate sensor and a gravity sensor is used, specifically, a drip chamber is arranged between the drainage tube 50 and the urine collector 80, an infrared drip rate sensor is arranged at the periphery of the drip chamber, and meanwhile, the gravity sensor is arranged, and the urine collector 80 is suspended below the gravity sensor.
  4. A system according to claim 1, wherein a non-return valve is further provided between the suction chamber 60 and the urine collector 80.
  5. A system according to claim 1, wherein the negative pressure generator is in communication with and controlled by the control board, and the operating pressure adjustment range of the negative pressure generator is not less than-10 cmH 2 0~0.
  6. A system according to claim 1, wherein the range of the pressure sensor is not less than-10 cm H 2 0~0 and the measurement accuracy is not less than 1cm H 2 .
  7. A system according to claim 1, wherein the urine meter 30 has a measuring range of not less than 0 to 1000ml and a measuring accuracy of not less than 1ml.
  8. A method, comprising: (1) According to the drainage interval time and the drainage negative pressure value which are set by medical staff at the man-machine interaction interface 11, the system automatically starts the negative pressure generator to suck, so that negative pressure is generated in the negative pressure suction cavity 60; (2) During the period, the pressure sensor dynamically monitors the negative pressure value in the negative pressure suction cavity 60 and feeds back the negative pressure value to the core processor, and the core processor instructs the negative pressure generator to dynamically correct the working pressure and stably maintain the negative pressure value in the negative pressure suction cavity 60 within a set drainage negative pressure value range; (3) Under the continuous action of the negative pressure generator, urine retained in the bladder or drainage tube 50 is sucked into the negative pressure suction cavity 60, and the urine flows into the urine collector 80 under the action of gravity; (4) During the negative pressure drainage, the urine metering device 30 dynamically senses the increment of the urine volume, and the negative pressure generator stops working after the increment of the urine volume is stopped, or alternatively, the human-computer interaction interface 11 can also set the negative pressure holding time independently, and the negative pressure generator stops working after the negative pressure holding time set by the system is reached; (5) The urine metering device 30 dynamically monitors the newly increased urine volume in the period, displays and reads the newly increased urine volume on the human-computer interaction interface 11, and dynamically prompts when oliguria or oliguria occurs, so that one urine negative pressure drainage and metering period is finished; (6) Periodically repeating the steps (1) - (5), periodically emptying the urine retained in the bladder or the drainage tube 50, and calculating the urine volume; (7) The drainage interval time in the system is set between 1min and 60min, and preferably, the drainage interval time is set between 5 and 15 min; (8) The negative drainage pressure value in the system is set between-40 cmH 2 0～-1cmH 2 and-20 cmH 2 0～-5cmH 2 ; (9) The system can set the negative pressure holding time to be 1 min-5 min, and the negative pressure holding time is preferably set to be 2min.
  9. The method of claim 8, wherein the working methods (1) - (9) for controlling urine drainage under negative pressure are written into the embedded soft part of the system after software programming.
  10. A method according to claim 8, wherein the drainage interval time, the drainage negative pressure value or the negative pressure holding time can be set autonomously according to the characteristics and clinical requirements of the patient, urine retained in the bladder or the drainage tube 50 is emptied at regular time, and the real urine volume produced by the patient in the period is calculated.

Description

Negative pressure control urine drainage system and method Technical Field The invention relates to a negative pressure control urine drainage system and a negative pressure control urine drainage method, which are used for dynamically monitoring a patient with an indwelling catheter and belong to the field of medical equipment or nursing products. Background Oliguria (meaning less than 17ml of urine per hour) is an independent predictor of Acute Kidney Injury (AKI), and a number of medical studies have demonstrated that persistent oliguria in ICU hospitalized patients is associated with higher mortality. Therefore, oliguria has been registered as an early sensitive indicator of acute kidney injury and should be monitored strictly and dynamically. The existing indwelling catheterization nursing technical specification is that a catheter is indwelled in a bladder of a patient, the catheter is communicated with a urine collector by adopting a drainage tube, the urine collector is suspended at the peripheral position of a sickbed lower than a wound surface, and urine in the bladder is discharged into the urine collector by utilizing siphon effect caused by drop of the bladder and the urine collector. When the urine volume of the patient needs to be calculated, the measuring cup is used for measuring and recording the urine volume collected in the urine collector. In recent years, as electronic technology continues to be advanced in medical applications, electronic urine meters (collectively called "functional products like this) for dynamically monitoring the urine volume of patients have been brought into clinical use. The basic principle of the product is that an electronic urine meter is arranged on the periphery of a patient bed, a urine collector is hung on a gravity sensor arranged on the electronic urine meter, and the gravity sensor dynamically weighs urine in the urine collector and converts the urine into urine volume for displaying and reading. The existing urine quantity measuring method has the major defects that in clinical practice, as the distance from the bladder of a patient to the urine collector is long, the position change of the patient such as left and right turn-over needs to be met, and the length of a drainage tube from a catheter interface to the urine collector is generally 120 cm-150 cm. According to the measurement in the clinical real scene, taking a drainage tube with the inner diameter of 5mm as an example, the catheter is connected to the upstream of the urine collector and is flatly paved in the drainage tube on the bed, and the retained urine volume is 45 ml-50 ml. Therefore, no matter manual measurement or electronic urine meter measurement is adopted, only the urine quantity value in the urine collector can be measured and obtained, but the urine quantity retained in the drainage tube or the bladder cannot be measured, and the deviation value of the obtained urine quantity value and the urine quantity actually generated in unit time of a patient is large. In particular, for oliguric patients with urine volume less than 17ml per hour, urine from the first 1 to 3 hours may remain entirely within the bladder or the drain tube laying on the bed, while as the volume of urine discharged from the bladder continues to increase, the urine retained within the drain tube slowly crawls towards the urine bag, and finally under a siphon effect, such as at hour 4, all urine is discharged simultaneously into the urine collector and is incorrectly counted for this period of urine volume. It can be seen that the current drainage state and measurement method can not accurately reflect the actual urine volume secreted by the patient in unit time, and influence the early diagnosis reliability of Acute Kidney Injury (AKI). On the other hand, urine is retained in the drainage tube, which is easy to cause deposition of sugar, protein, calcium, sodium and other inorganic salts in the urine, and lead to crystallization of salt at the head of the catheter or blockage of the drainage tube. In addition, urine is retained in the drainage tube, bacteria are easy to breed, and the urine flows upwards to the bladder in a retrograde way, so that the risk of urinary tract infection is increased. Therefore, the inventor provides a negative pressure control urine drainage system and a negative pressure control urine drainage method, and the defects of the existing urine volume monitoring and drainage technology are overcome. Disclosure of Invention The invention relates to a negative pressure control urine drainage system and a method, which mainly comprise the following steps: A system comprising a monitoring device and a companion drainage material, wherein: the monitoring equipment comprises a control main board, a negative pressure generator, a pressure sensor, a urine metering device and a human-computer interaction interface. The control main board is an integrated circuit constructed by components such