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CN-114984351-B - Hemodialysis heating apparatus and method

CN114984351BCN 114984351 BCN114984351 BCN 114984351BCN-114984351-B

Abstract

The invention relates to a hemodialysis heating device, which is provided with a processor and a temperature detection module, wherein the processor comprises a first temperature detection module used for detecting the surface skin temperature of a temporal artery, a second temperature detection module used for detecting the blood temperature when entering a human body, and a third temperature detection module used for detecting the temperature of a heating element. The hemodialysis heating method comprises the following steps of detecting the surface skin temperature of a temporal artery, detecting the blood temperature when entering a human body, detecting the temperature of a heating element, and obtaining the heat conductivity coefficient of the blood based on the difference value between temperature data and a threshold value and calculation so as to adjust the heating amplitude of the heating element.

Inventors

  • LOU RAN

Assignees

  • 首都医科大学宣武医院

Dates

Publication Date
20260505
Application Date
20220520

Claims (10)

  1. 1. Hemodialysis heating device is provided with the treater, temperature detection module, its characterized in that, temperature detection module includes: The first temperature detection module is arranged on the head of a patient during detection and is used for detecting the surface skin temperature of the temporal artery, and after detection, the first temperature detection module can send the first temperature data obtained through detection to the processor; the second temperature detection module is used for detecting the temperature of blood entering a human body, and after detection, the second temperature detection module can send the detected second temperature data to the processor; the third temperature detection module is used for detecting the temperature of the heating assembly, and after detection, the third temperature detection module can send the detected third temperature data to the processor; the processor can calculate the blood heat conduction coefficient based on the second temperature data and the third temperature data, and adjust the heating amplitude of the heating component based on the difference value between the first temperature data and the threshold value and the calculated blood heat conduction coefficient, so that the temperature of liquid when entering a human body can change in the direction of recovering the human body to the normal temperature based on the different temperature states of the human body; the processor generates a relation rule of the second temperature and the third temperature based on the acquired corresponding data between the third temperature and the second temperature, monitors the current temperature of the third temperature based on the relation rule, and controls the heating component to reduce the output power so that the third temperature is reduced below the threshold value when the third temperature exceeds the threshold value, wherein when the third temperature is at the threshold value, the second temperature which is lagged and changed based on the relation rule is at an input early warning temperature value, and the input early warning temperature value is lower than the input temperature damage value.
  2. 2. The hemodialysis heating apparatus of claim 1, further comprising a weighing module for weighing the undenatured dialysate, the weighing module transmitting detected weight data to the processor after weighing is completed.
  3. 3. The hemodialysis heating apparatus of claim 2, wherein the processor calculates a dialysis rate and a blood flow rate based on the change in the weight data and the time of the change.
  4. 4. The hemodialysis heating apparatus of claim 3, wherein the processor calculates a blood flow warming rate per unit volume based on the dialysis rate and blood flow rate to adjust a temperature of the heating assembly.
  5. 5. Hemodialysis heating device according to claim 1, comprising a tubing element (100) provided with an inner tube (110), said inner tube (110) being intended for letting in heated but not yet dialyzed dialysis fluid, a middle tube (120), said middle tube (120) being intended for letting in dialyzed blood back into the body, an outer tube (130), said outer tube (130) being intended for letting in dialyzed waste dialysis fluid, wherein the tube diameter of said middle tube (120) is larger than the tube diameter of said inner tube (110), said inner tube (110) being arranged inside said middle tube (120).
  6. 6. The hemodialysis heating apparatus of claim 5, wherein the outer tube (130) has a tube diameter greater than the tube diameter of the middle tube (120), the middle tube (120) and the inner tube (110) being disposed within the outer tube (130).
  7. 7. The hemodialysis heating apparatus of claim 6, wherein the inner tube (110), the middle tube (120), and the outer tube (130) are separated by a tube wall such that dialyzed blood in the middle tube (120) is capable of exchanging heat with the inner tube (110) and the outer tube (130) through the tube wall during transport.
  8. 8. The hemodialysis heating method applied to the hemodialysis heating device according to any one of claims 1 to 7, comprising the steps of detecting the surface skin temperature of a temporal artery as first temperature data, detecting the blood temperature when entering a human body as second temperature data, detecting the temperature of a heating component as third temperature data, calculating the blood heat conductivity coefficient based on the second temperature data and the third temperature data, and adjusting the heating amplitude of the heating component based on the difference value between the first temperature data and a threshold value and the calculated blood heat conductivity coefficient; and generating a relation rule of the second temperature and the third temperature based on the acquired corresponding data between the third temperature and the second temperature, monitoring the current temperature of the third temperature based on the relation rule, and controlling the heating component to reduce the output power to enable the third temperature to be lower than the threshold value when the third temperature exceeds the threshold value, wherein when the third temperature is in the threshold value, the second temperature which is in hysteresis change based on the relation rule is in an input early warning temperature value, and the input early warning temperature value is lower than an input temperature damage value.
  9. 9. The hemodialysis heating method of claim 8, comprising the step of weighing the undenatured dialysate to obtain weight data.
  10. 10. The hemodialysis heating method of claim 9, comprising the steps of calculating a dialysis rate and a blood flow rate based on the change in the weight data and a time of the change, calculating a blood flow warming rate per unit volume based on the dialysis rate and the blood flow rate, and adjusting a temperature of the heating element.

Description

Hemodialysis heating apparatus and method Technical Field The invention relates to the technical field of medical instruments, in particular to a hemodialysis heating device and a hemodialysis heating method. Background In daily life, the temperatures of armpits, oral cavities and forehead are generally measured, and the temperatures are body surface temperatures in a strict sense, have certain errors with core temperatures, are easily interfered by various factors such as surrounding environment, personal dressing and the like, and cannot accurately represent the core body temperature of a human body. The human core temperature is really closely related to human metabolism, so that the real-time monitoring of the human core temperature has a reference value. The common method for monitoring the core temperature of the human body comprises nuclear magnetism temperature measurement, rectum temperature measurement, cochlea temperature measurement, esophagus temperature measurement, pulmonary artery temperature measurement and the like. Although the core temperature can be measured relatively closely by the temperature measuring methods, the temperature measuring methods have the defects of inconvenient measurement, need to invade the human body, incapability of measuring the temperature when the human body is dynamic and the like. The temporal artery is connected to the heart by the carotid artery, directly from the aorta, providing a constant blood flow, the artery closest to the surface of the skin. In addition, the temporal artery is positioned on the forehead, is easy to touch, and the core body temperature is obtained by measuring the skin temperature on the surface of the temporal artery, so that the method is easier to use and milder than an oral, rectal and in-ear thermometer. The prior art, as in CN103826671a, proposes a device for hemodialysis, hemodiafiltration, hemofiltration or peritoneal dialysis with a heating function, wherein the device comprises at least one conduit for transferring at least one of blood and dialysate, and a heating unit for heating at least one of blood and dialysate, wherein the fluid heated by the heating unit is a substance to be infused into the human body, the heating unit being arranged for measuring a flow rate of the fluid to be heated and an infusion temperature related to the flow rate to heat the fluid to be heated. The heating unit includes a flow passage through which a fluid to be heated flows, a heater formed as a part of the flow passage for generating heat, and a cover device including a first connection portion through which the fluid enters the flow passage, and a second connection portion through which the fluid flows out of the flow passage. The device can inject blood at the same or nearly the same temperature as the human body into the human body to prevent side effects caused by dialysis, and also can deform the shape of the flow channel around the heater to effectively heat the blood. However, the core body temperature of the human body will determine how much the device heats up to the same or closer to the human body, and the device does not make a more accurate determination of the core body temperature, and therefore such heating is inaccurate. A hemodialysis tube member and a hemodialysis apparatus are proposed in the prior art, such as CN 211434400U. The hemodialysis tube assembly includes a blood line, a heating tube assembly, and a circulation heating mechanism. One end of the heating sleeve is connected with the water inlet pipe, the other end of the heating sleeve is connected with the water outlet pipe, the water inlet pipe and the water outlet pipe are connected with the circulating heating mechanism, the circulating heating mechanism is used for heating circulating liquid and inputting the circulating liquid into the water inlet pipe, the heating sleeve is sleeved outside the blood transfusion pipe and is attached to the blood transfusion pipe, and heat of the circulating liquid is transferred into the blood transfusion pipe. The hemodialysis pipe part that this device provided owing to adopted the cover to locate the outer heating sleeve pipe of blood transfusion pipe and respectively with inlet tube and outlet pipe connection's circulation heating mechanism, so can heat blood, but such setting mode heat utilization ratio is not high, and long-time use can cause very big energy consumption, and dialysis pipe part heating efficiency is unfavorable for energy-concerving and environment-protective yet. The utility model provides a nephrology department hemodialysis device in like CN107754037A, including the bottom plate, the upper surface of bottom plate is equipped with four electric telescopic links that equidistance distributes, electric telescopic link's top is connected with hemodialysis ware, hemodialysis ware's left surface is equipped with the PLC controller, hemodialysis ware leading flank is close to the position department of b