CN221205443U

CN221205443U - Bladder pressure measuring device based on pressure sensor

Info

Publication number: CN221205443U
Application number: CN202322461180.0U
Authority: CN
Inventors: 禹小燕; 王花芹; 周艳; 唐莉; 余波; 李金秀
Original assignee: Second Xiangya Hospital of Central South University
Current assignee: Second Xiangya Hospital of Central South University
Priority date: 2023-09-11
Filing date: 2023-09-11
Publication date: 2024-06-25
Anticipated expiration: 2033-09-11

Abstract

The utility model provides a bladder pressure measuring device based on a pressure sensor, which comprises a main body catheter, a pressure measuring assembly and a liquid injection assembly, wherein the main body catheter is connected with the pressure measuring assembly; the front end of the main body catheter is a bladder insertion end, the rear end of the main body catheter is a connecting end, and the bladder insertion end is provided with a drainage hole communicated with the lumen of the main body catheter; the pressure measuring assembly comprises a pressure measuring joint communicated with the connecting end and a pressure sensor communicated with the pressure measuring joint, and the pressure sensor is used for measuring the pressure in the main body catheter; the liquid injection assembly comprises a first three-way valve and a liquid injection piece, and the liquid injection piece is used for sucking a preset amount of sterile liquid and then injecting the liquid into the main body catheter; the device discharges urine and gas in the main body catheter through the liquid injection component, so that the influence of bubbles in the urine on pressure transmission is eliminated, and the measurement error of the pressure sensor is reduced; meanwhile, the device is in a closed state in the use process, so that the infection opportunity is not easy to increase, the infection risk can be reduced to the greatest extent, the occurrence of cross infection is avoided, and the safety is high.

Description

Bladder pressure measuring device based on pressure sensor

Technical Field

The utility model relates to the technical field of pressure detection medical instruments, in particular to a bladder pressure measuring device based on a pressure sensor.

Background

Bladder pressure is an important indicator for assessing the function of a patient's bladder and may reflect the urine storage and drainage capacity of the bladder, as well as the pressure balance of the bladder and urethra. Medical staff needs to judge whether the patient has bladder dysfunction according to the measurement result of the bladder pressure, and the bladder dysfunction is used as the basis for selecting a treatment scheme. Furthermore, since the bladder is an intra-abdominal structure, changes in pressure within the bladder can reflect changes in intra-abdominal pressure, and thus, bladder pressure is considered to be a "gold standard" for clinically indirectly measuring intra-abdominal pressure. Bladder pressure is of great importance for the diagnosis and treatment of intra-abdominal hypertension and abdominal compartment syndrome in critically ill patients, and these pathological conditions may lead to multiple organ dysfunction and death in the patient. Therefore, the bladder pressure can monitor the change of the illness state of the patient, find abnormal rise or fall of intra-abdominal pressure in time, guide clinical treatment and nursing and improve the survival rate of severe patients. For critically ill patients, the bladder pressure needs to be measured periodically in order to find problems associated with handling intra-abdominal pressure in time, it is generally recommended to measure the bladder pressure accurately every 1 to 4 hours.

Common methods for making cystometric measurements are: taking a supine position of a patient, placing a catheter through urethra under aseptic condition, filling about 25ml of physiological saline into the bladder after the bladder is emptied, then communicating the catheter with a pressure measuring catheter which is vertically placed, so that the other end of the pressure measuring catheter is communicated with the atmosphere, and measuring the height of a liquid column in the pressure measuring catheter by a meter ruler at the end of expiration of the patient by taking the level of the central line of the armpit as a zero point, namely the pressure value of the bladder; the above method has the following problems: when the catheter and the pressure measuring catheter are required to be disassembled and assembled for multiple times of measurement, the other end of the pressure measuring catheter is communicated with the atmosphere, so that the operation links are more, the process is complex, and the infection risk is increased.

Because of the pressure transmission function of the liquid, a method for measuring the pressure in the bladder through a pressure sensor connected to the catheter is currently available to solve the problems, for example, chinese patent CN107374654A discloses a catheter capable of measuring the pressure in the bladder, which comprises a main catheter, wherein an extension tube is arranged on the other side of the main catheter close to the head end, one end of the extension tube is communicated with the lumen of the main catheter, the other end of the extension tube is integrally provided with the pressure sensor, the upper side of the pressure sensor is connected with a signal wire, the upper end of the signal wire is connected with a pressure measuring joint, and the head end of the main catheter is provided with a catheter joint; however, when the urinary catheter in the above patent contains bubbles and other factors, the pressure transmission is affected, and the measurement result of the pressure sensor is further affected, so that the bladder pressure measurement error is caused.

Disclosure of utility model

In order to solve the problems, the utility model provides a device for accurately measuring the bladder pressure based on a pressure sensor, which can directly measure the pressure in the bladder, has the function of injecting liquid and exhausting air, can eliminate the influence of factors such as bubbles in a catheter on pressure transmission, and improves measurement accuracy and safety.

In order to achieve the above object, the present utility model adopts the following technical scheme:

A bladder pressure measuring device based on a pressure sensor comprises a main body catheter, a pressure measuring component and a liquid injection component; the front end of the main body catheter is a bladder insertion end, the rear end of the main body catheter is a connecting end, and the bladder insertion end is provided with a drainage hole communicated with the lumen of the main body catheter;

The pressure measuring assembly comprises a pressure measuring joint communicated with the connecting end and a pressure sensor communicated with the pressure measuring joint, and the pressure sensor is used for measuring the pressure in the main body catheter;

The liquid injection assembly comprises a first three-way valve and a liquid injection piece, a first connector of the first three-way valve is connected with a pressure measuring connector, a second connector is connected with a pressure sensor, and a third connector is connected with the liquid injection piece; the liquid injection piece is used for sucking a preset amount of sterile liquid and injecting the liquid into the main body catheter.

Further, the bladder pressure measuring device also comprises a urine collecting component, wherein the urine collecting component comprises a urination joint communicated with the connecting end, a urine tube with one end communicated with the urination joint and a urine bag with the other end communicated with the urine tube.

Further, the bladder pressure measuring device further comprises a limiting component of the main body catheter, the limiting component comprises a balloon and a filling connector, the balloon is arranged outside the bladder insertion end, the filling connector is arranged on the connecting end, and a filling channel which is communicated with the balloon and the filling connector is arranged in the wall of the main body catheter.

Further, the pressure measurement assembly also includes an extension conduit connected between the pressure measurement fitting and the pressure sensor.

Further, the liquid injection piece comprises a connecting pipe, a liquid storage cylinder, a piston shaft, a piston handle, a supporting handle and a sterile sleeve, wherein the connecting pipe is arranged at the front end of the liquid storage cylinder and is communicated with the inner cavity of the liquid storage cylinder, the piston is in sealing and sliding connection with the inner wall of the liquid storage cylinder, one end of the piston shaft is fixedly connected with the piston, the other end of the piston shaft extends out of the liquid storage cylinder and is fixedly connected with the piston handle, the supporting handle is fixedly arranged at the rear end of the liquid storage cylinder, the piston handle is parallel to the supporting handle, and a scale mark for displaying the content of the liquid storage cylinder and a corresponding scale value are marked outside the liquid storage cylinder; and two ends of the sterile sleeve are respectively and hermetically connected with the supporting handle and the piston handle.

Further, the liquid injection assembly further comprises a second three-way valve, a liquid conveying pipe and a liquid conveying bag, a first joint of the second three-way valve is connected with a third joint of the first three-way valve, the second joint is connected with the liquid conveying pipe, the other end of the liquid conveying pipe is communicated with the liquid conveying bag, and the third joint is connected with the liquid injection piece.

Further, the pressure sensor is connected with a wire, and the other end of the wire is provided with a connecting plug which can be inserted on the monitor.

Further, the bladder pressure measuring device further comprises a fixing component for fixing the positions of the pressure sensor and the liquid injection component, the fixing component comprises a fixing plate for fixing the pressure sensor and the liquid injection component and a fixing piece for fixedly mounting the fixing plate at a preset position, and the fixing piece can be a fixing belt or a fixing buckle.

Due to the adoption of the technical scheme, the bladder pressure measuring device disclosed by the utility model can be used for measuring the bladder pressure based on the main body catheter with one end arranged in the bladder and the pressure sensor communicated with the main body catheter, and is simple and convenient to operate and suitable for repeated bladder pressure measurement required by clinic;

The device injects a predetermined amount of sterile liquid into the main body catheter through the liquid injection assembly so as to discharge urine and gas in the main body catheter, thereby eliminating the influence of bubbles in the urine on pressure transmission and reducing the measurement error of the pressure sensor; meanwhile, the device is in a closed state in the use process, so that the infection opportunity is not easy to increase, the infection risk can be reduced to the greatest extent, the occurrence of cross infection is avoided, and the safety is high.

Drawings

Fig. 1 is a schematic plan view of the whole structure of embodiment 1 of the present utility model.

Fig. 2 is a schematic plan view showing the whole structure of embodiment 2 of the present utility model.

The reference numerals are described in the following table:

Number of marks	Tag name	Number of marks	Tag name
				1	Main body catheter 1	9	Wire 9
2	Urination connector 2	10	Fixing plate 10
				3	Filling joint 3	11	Liquid injection part 11
4	Balloon 4	12	Second three-way valve 12
				5	Pressure measuring joint 5	13	Infusion tube 13
6	Extension catheter 6	14	Infusion bag 14
				7	First three-way valve 7	15	Sterile sleeve 15
8	Pressure sensor 8

Detailed Description

For a clearer description of embodiments of the utility model or of the solutions of the prior art, the drawings that are needed in the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained by those skilled in the art without inventive effort, the utility model being further described below in connection with the accompanying drawings:

Possible causes of air bubbles in catheters include: 1, air enters: most of the patient's catheters have bubbles, and the bubbles in the catheters can travel to the top of the bladder after entering the bladder due to the characteristic that the bubbles travel to the high place when the catheters are inserted, so that the patient generally does not need to worry too much, the bubbles in the catheters can not influence the human body, and the treatment is not needed; urinary tract infection: the air bubbles in the urinary catheters of partial patients are caused by urinary tract infection and are mainly caused by infection of clostridium perfringens, and the bacillus can generate gas and generally cannot greatly influence the human body; 3, urinary tract calculus: urinary tract stones are deposited from calcium salts in the urinary tract, which can block the urinary tract and prevent the urine from flowing normally. When urine accumulates at the stone, bubbles are formed and cause pressure change in the urinary catheter, so that the bubbles enter the urinary catheter; 4, urethral stricture: urethral stricture refers to the occurrence of constriction or blockage of the urethra, resulting in the inability of urine to normally drain. In this case, urine may accumulate in the stricture, forming bubbles and entering the urinary tract;

Although bubbles generated in the catheter do not affect the human body, when the bladder pressure measurement is performed by the pressure transmission action of the liquid, the measurement result of the bladder pressure measurement is affected, and the bladder pressure measurement error is caused, so that the liquid injection and bubble discharge are required before the bladder pressure measurement is performed based on the pressure sensor.

Example 1

Referring to fig. 1 of the accompanying drawings, a bladder pressure measuring device based on a pressure sensor comprises a main body catheter 1, a urination connector 2, a filling connector 3, a balloon 4, a pressure measuring connector 5, a first three-way valve 7 and a liquid injection piece 11; the front end of the main body catheter 1 is a bladder insertion end, the rear end is a connecting end, and the bladder insertion end is provided with a drainage hole communicated with the lumen of the main body catheter 1; the urination connector 2 is communicated with the connecting end, the urination connector 2 is connected with a urine tube of the urine bag, urine in the bladder enters the tube cavity of the main body catheter 1 through the drainage hole, the urination connector 2 and the urine tube finally enter the urine bag for collection, so that normal drainage and catheterization of a patient are facilitated, and the bladder is emptied before the bladder pressure measurement; the pressure measuring joint 5 is communicated with the connecting end, the pressure sensor 8 is communicated with the pressure measuring joint 5, and when the main body catheter 1 is filled with liquid, the pressure of the liquid in the main body catheter 1 can be measured through the pressure sensor 8, so that the bladder pressure can be measured; the liquid injection piece 11 can be a 50ml syringe.

The first joint of the first three-way valve 7 is connected with the pressure measuring joint 5, the second joint is connected with the pressure sensor 8, the third joint is connected with the liquid injection piece 11, before bladder pressure measurement is carried out, after the bladder is emptied and the urinary catheter is clamped, the control handle of the first three-way valve 7 is rotated, the first joint is communicated with the third joint, a preset amount of physiological saline (about 25 ml) in the liquid injection piece 11 is injected into the main body catheter 1 in a pushing mode, urine and gas in the main body catheter 1 are injected back into the bladder, the physiological saline fills the main body catheter 1 without gas or bubbles, the control handle of the first three-way valve 7 is rotated, the first joint is communicated with the second joint, the pressure in the main body catheter 1 can be accurately measured, and errors caused by factors such as bubbles in the main body catheter 1 on bladder pressure measurement results are eliminated.

In fig. 1, because the pressure measuring joint 5 is short, when the first three-way valve 7 is directly connected with the pressure measuring joint 5, the first three-way valve 7, the pressure sensor 8 and the liquid injection member 11 are close to the body of the patient, so that on one hand, the risk of infection of the urethral orifice may be increased, and on the other hand, the operation of fixing the first three-way valve 7, the pressure sensor 8 and the liquid injection member 11 and performing bladder pressure measurement is inconvenient; therefore, the extension tube 6 is connected between the pressure measuring joint 5 and the first joint of the first three-way valve 7, and the first three-way valve 7, the pressure sensor 8, and the filling member 11 can be moved away from the patient.

In order to conveniently fix the first three-way valve 7, the pressure sensor 8 and the liquid injection piece 11 and to conveniently adjust the position of the pressure sensor 8 to be level with the axillary midline of a patient, a fixing plate 10 capable of fixing the first three-way valve 7, the pressure sensor 8 and the liquid injection piece 11 on the fixing plate 10 and a fixing piece capable of fixedly installing the fixing plate 10 at a preset position are arranged;

Specifically, the pressure sensor 8, the first three-way valve 7, the second three-way valve 12 and the liquid injection piece 11 can be detachably fixed on the front surface of the fixing plate 10 through a fixing buckle or a fixing belt or a medical adhesive tape, the fixing piece is arranged on the back surface of the fixing plate 10, and the fixing piece can be the fixing belt or the fixing buckle, and the fixing belt or the fixing buckle can fix the fixing plate 10 on a bed rail of a sickbed so that the position of the pressure sensor 8 is flush with the axillary center line of a patient.

After the main body catheter 1 is placed into the bladder of a patient, in order to prevent an unintended extubation, a balloon 4 and a filling joint 3 are arranged, the balloon 4 is arranged outside the insertion end of the bladder, the filling joint 3 is arranged on the connecting end, a filling channel which is communicated with the balloon 4 and the filling joint 3 is arranged in the wall of the main body catheter 1, the main body catheter 1 can be connected to the filling joint 3 through a filling device (such as a syringe), and physiological saline or air is injected into the balloon 4 through the filling channel to fill the balloon 4, so that the filled balloon 4 is fixed at the joint of the bladder and the urethra, so that the main body catheter 1 is limited and fixed.

In order to facilitate visual display and record of the bladder pressure value, the pressure sensor 8 is connected with a lead 9, and the other end of the lead 9 is provided with a connecting plug which can be inserted on the monitor, so that the bladder pressure value is displayed and automatically recorded on the monitor.

When the pipelines or the components are connected, the pipelines or the components can be connected through the luer connector, so that the pipelines or the components can be prevented from being separated from each other unintentionally in the use process, and liquid leakage or gas leakage can be prevented.

Before each accurate measurement of bladder pressure, the pressure sensor 8 can be calibrated to make the measurement accuracy higher; the calibration of the pressure sensor 8 comprises the position calibration of the pressure sensor 8 and the zeroing of the pressure sensor 8, wherein the position calibration of the pressure sensor 8 is that the pressure sensor 8 is flush with the axillary midline of the patient when the patient is in the supine state; zeroing of the pressure sensor 8 may reduce measurement errors of the pressure sensor 8 itself after long-term use or in certain circumstances.

The pressure measurement method of the bladder pressure measurement device in this embodiment is as follows: connecting a urine tube of the urine bag with the urination connector 2, connecting the pressure measuring connector 5, the extension catheter 6, the first three-way valve 7, the pressure sensor 8 and the liquid injection piece 11, sucking physiological saline in the liquid injection piece 11, and fixing the first three-way valve 7, the pressure sensor 8 and the liquid injection piece 11 on a fixed plate; sterilizing the urethral orifice of a patient, inserting the bladder insertion end of the main body catheter 1 into the bladder through the urethral orifice, inserting a certain distance after urine flows out, connecting a filling device (such as a syringe) on the filling joint 3, injecting normal saline or air into the balloon 4 through a filling channel to fill the balloon 4, and pulling back the main body catheter 1 to fix the filled balloon 4 at the joint of the bladder and the urethra;

When bladder pressure needs to be detected: the fixing plate 10 is fixed on a bed column of a sickbed so that the position of the pressure sensor 8 is flush with the axillary midline of a patient, the pressure sensor 8 is connected to a monitor through a lead 9, after the bladder is emptied and a urinary catheter is clamped, the control handle of the first three-way valve 7 is rotated, the first joint of the first three-way valve 7 is communicated with the third joint, a preset amount of physiological saline in the liquid injection piece 11 is pushed into the main body catheter 1 to discharge urine and bubbles in the main body catheter 1, the pressure sensor 8 is zeroed, the control handle of the first three-way valve 7 is rotated, the first joint of the first three-way valve 7 is communicated with the second joint, the pressure in the main body catheter 1 can be accurately measured, the pressure sensor 8 transmits and displays the detected pressure value to the monitor electrically connected with the pressure sensor, medical staff can obtain the accurate bladder pressure value of the patient from the display screen of the monitor, and the monitor can automatically record the corresponding bladder pressure value;

At present, the accurate measurement of the bladder pressure is required to be carried out for critical patients for 1 to 4 hours, and then the method is repeated every 1 to 4 hours to carry out the accurate measurement of the bladder pressure. After one accurate measurement of the bladder pressure, the clamped urinary catheter can be reopened, so that the urinary catheter can be opened in the time of the accurate measurement interval of the two bladder pressures, continuous drainage is performed, and the bladder pressure is continuously monitored at the same time. Although the bladder pressure value in the continuous monitoring process may cause errors in the bladder pressure value measured by the pressure sensor 8 due to the body position change of the patient or the air bubbles in the main catheter 1, the bladder pressure value in the continuous monitoring process can be used for monitoring abnormal rise or fall of intra-abdominal pressure, and timely finding out the change of illness;

The measured bladder pressure of the patient is the indirect abdominal cavity pressure of the patient, and medical staff subtracts the measured bladder pressure of the patient from the average arterial pressure of the patient measured by the existing instrument to obtain the abdominal cavity perfusion pressure of the patient, so that the abdominal cavity perfusion pressure of the patient is measured.

Example 2

In the above embodiment 1, after the normal saline is pumped through the liquid injection member 11, the liquid injection member 11 is connected to the second connector of the first three-way valve 7 to perform liquid injection and air exhaust into the main catheter 1, and the liquid injection member 11 cannot be used again after the normal saline is pumped down, so that after the liquid injection member 11 completes liquid injection and air exhaust, the liquid injection member 11 needs to be removed and discarded, and the second connector of the first three-way valve 7 needs to be aseptically sealed by using a heparin cap or a positive pressure connector, and a new liquid injection member 11 needs to be taken for completion when the liquid injection and air exhaust are performed next time, thereby increasing the operation complexity and increasing the risk of infection.

Referring to fig. 2 of the specification, and based on embodiment 1, the bladder pressure measurement device further includes a second three-way valve 12, an infusion tube 13, and an infusion bag 14, wherein a first joint of the second three-way valve 12 is connected with a third joint of the first three-way valve 7, the second joint is connected with the infusion tube 13, the other end of the infusion tube 13 is communicated with the infusion bag 14, and the third joint is connected with the infusion piece 11;

The liquid injection piece 11 comprises a syringe capable of being in sealing connection with the third joint and a sterile sleeve 15 arranged on the syringe, the syringe comprises a connecting pipe, a liquid storage barrel, a piston shaft, a piston handle and a supporting handle, the connecting pipe is arranged at the front end of the liquid storage barrel and is communicated with the inner cavity of the liquid storage barrel, the piston is in sealing and sliding connection with the inner wall of the liquid storage barrel, one end of the piston shaft is fixedly connected with the piston, the other end of the piston shaft extends out of the liquid storage barrel and is fixedly connected with the piston handle, the supporting handle is fixedly arranged at the rear end of the liquid storage barrel, the piston handle is parallel to the supporting handle, two ends of the sterile sleeve 15 are respectively in sealing connection with the supporting handle and the piston handle, and scale marks for displaying the inner capacity of the liquid storage barrel and corresponding scale values are marked outside the liquid storage barrel; the aseptic sleeve 15 can prevent external air from entering the liquid storage cylinder to pollute the piston and the piston shaft, and can realize the repeated use of the liquid injection piece 11; specifically, the aseptic sleeve 15 is made of a soft film material, the length of the aseptic sleeve 15 is larger than that of the piston shaft, and the aseptic sleeve 15 stretches or shortens along with the expansion of the piston shaft along the liquid storage cylinder; the above-mentioned injection member 11 is an improvement of the existing syringe, wherein the structures of the connecting tube, the liquid storage cylinder, the piston shaft, the piston handle and the supporting handle are consistent with those of the syringe, and the improvement is that a sterile sleeve 15 is added so as to realize the reusability of the injection member 11.

Specifically, the pressure sensor 8, the first three-way valve 7, the second three-way valve 12 and the liquid injection part 11 may be fixed on the front surface of the fixing plate 10, the fixing part is disposed on the back surface of the fixing plate 10, and the fixing part may be a fixing belt or a fixing buckle, and the fixing belt or the fixing buckle may fix the fixing plate 10 on a bed rail of a hospital bed;

The fixing assembly further comprises a floor type infusion support, the floor type infusion support comprises a supporting base, an upright post arranged on the supporting base and a hook arranged at the top of the upright post, the fixing plate 10 can be fixed on the upright post at the level position of the central line of the armpit of a patient through a fixing belt or a fixing buckle, and the infusion bag 14 can be hung on the hook.

The difference between the present embodiment 2 and the pressure measurement method of the bladder pressure measurement apparatus in embodiment 1 is that: when making bladder pressure measurements: after the bladder is emptied and the urinary catheter is clamped, the control handle of the second three-way valve 12 is rotated firstly to enable the second joint of the second three-way valve 12 to be communicated with the third joint, the piston handle of the infusion part 11 is pulled, physiological saline in the infusion bag 14 is sucked into the infusion part 11, quantitative suction is carried out through scale marks on the infusion part 11, the control handle of the first three-way valve 7 is rotated to enable the first joint of the first three-way valve 7 to be communicated with the third joint, the control handle of the second three-way valve 12 is rotated to enable the first joint of the second three-way valve 12 to be communicated with the third joint, the method comprises the steps of pushing and injecting a predetermined amount of physiological saline in a liquid injection piece 11 into a main body catheter 1 to discharge urine and bubbles in the main body catheter 1, zeroing a pressure sensor 8, rotating a control handle of a first three-way valve 7 to enable a first connector of the first three-way valve 7 to be communicated with a second connector, accurately measuring the pressure in the main body catheter 1, transmitting and displaying the detected pressure value by the pressure sensor 8 to a monitor electrically connected with the pressure sensor, obtaining an accurate bladder pressure value of a patient from a display screen of the monitor by medical staff, and recording the corresponding bladder pressure value by the monitor;

After one accurate measurement of the bladder pressure, the clamped urinary catheter can be reopened, so that the urinary catheter can be opened in the time between the two accurate measurements of the bladder pressure, continuous drainage is performed, and the bladder pressure is continuously monitored at the same time. Although the bladder pressure value in the continuous monitoring process may cause errors in the bladder pressure value measured by the pressure sensor 8 due to the body position change of the patient or the air bubbles in the main catheter 1, the bladder pressure value in the continuous monitoring process can be used for monitoring abnormal rise or fall of intra-abdominal pressure, and timely finding out the change of illness;

When the accurate measurement of the bladder pressure value is needed next time, the method can be repeated, and any component is not required to be disconnected in the whole monitoring process, so that the operation complexity can be reduced, and the risk of infection can be reduced.

Example 3

The inventor found that since a predetermined amount of physiological saline needs to be injected into the bladder, and the temperature of the physiological saline at normal temperature is lower than the temperature of a human body, when the physiological saline is injected into the bladder, the bladder may shrink, if the bladder pressure measurement is performed immediately after the injection of the physiological saline, the bladder pressure measurement error may be caused, and in order to eliminate the bladder pressure measurement error caused by the above reasons, it is generally the common practice to inject the predetermined amount of physiological saline into the bladder, and then measure the bladder pressure after at least one minute, so that the accuracy of the bladder pressure measurement can be ensured by using the bladder pressure measuring device according to the present utility model, specifically, after the injection of the predetermined amount of sterile liquid into the main catheter 1 by the injection assembly, the bladder pressure measurement is performed by communicating the main catheter 1 with the pressure sensor 8 after at least one minute, but the method affects the working efficiency of the bladder pressure measurement;

In view of the above problems, the inventors propose another improvement idea: pre-heating physiological saline to about 37 ℃ and then injecting the saline into the bladder to eliminate bladder pressure measurement errors caused by the temperature of the physiological saline;

Specifically, a heating constant temperature assembly can be designed, the heating constant temperature assembly comprises a cover body and a bag body, the cover body can seal the top opening of the bag body, the bag body is used for wrapping an infusion bag containing normal saline, the cover body is convenient for placing the infusion bag into the bag body, the cover body and the bag body comprise a heat preservation layer, a heating layer and a heat conduction layer from outside to inside, and a heating part is arranged in the heating layer; the heating component is an electrode, an electric heating wire or an electric heating rod which are uniformly distributed in the heating layer;

The heating part is communicated with the mobile power supply through the USB interface and is powered by the mobile power supply, and a temperature controller is arranged between the USB interface and the mobile power supply and can set the heating constant temperature;

The heat-insulating layer can be a foam board, and the foam board has good heat-insulating effect, low price and light weight; the heat conducting layer can be made of aluminum foil material, and the aluminum foil material can enable heat conduction to be more uniform; asbestos or glass fiber can be filled in the heating layer, and after the heating component heats, heat is transferred to the asbestos or glass fiber for heat preservation.

The cover body can be provided with an opening which is convenient for exposing the hanging ring of the infusion bag, the infusion bag and the heating constant temperature component can be hung integrally, and the bottom of the bag body can be provided with an opening which is convenient for leading out the infusion tube at the bottom of the infusion bag.

The normal saline in the infusion bag is heated to be constant temperature to about 37 ℃ through the temperature controller, so that the bladder pressure measurement can be performed immediately after the normal saline is directly injected into the bladder, and the working efficiency is improved.

It is clear that modifications and/or additions of parts may be made to the bladder pressure measuring device based on pressure sensors, as well as to the corresponding method, as described heretofore, without departing from the field and scope of the present utility model.

It is also clear that, although the present utility model has been described in detail with respect to such a pressure sensor-based bladder pressure measuring device, a person skilled in the art shall certainly be able to achieve many other equivalent forms of pressure sensor-based bladder pressure measuring device and corresponding method, having the characteristics as set forth in the claims and hence all coming within the field of protection defined thereby.

Claims

1. A bladder pressure measurement device based on a pressure sensor, characterized in that: comprises a main body catheter (1), a pressure measuring component and a liquid injection component; the front end of the main body catheter (1) is a bladder insertion end, the rear end of the main body catheter is a connecting end, and the bladder insertion end is provided with a drainage hole communicated with the lumen of the main body catheter (1);

The pressure measuring assembly comprises a pressure measuring joint (5) communicated with the connecting end and a pressure sensor (8) communicated with the pressure measuring joint (5), wherein the pressure sensor (8) is used for measuring the pressure in the main body catheter (1);

The liquid injection assembly comprises a first three-way valve (7) and a liquid injection piece (11), wherein a first joint of the first three-way valve (7) is connected with a pressure measuring joint (5), a second joint is connected with a pressure sensor (8), and a third joint is connected with the liquid injection piece (11); the liquid injection piece (11) is used for sucking a preset quantity of sterile liquid and injecting the liquid into the main body catheter (1).

2. The bladder pressure measurement device according to claim 1, wherein: the infusion assembly further comprises a second three-way valve (12), an infusion tube (13) and an infusion bag (14), a first joint of the second three-way valve (12) is connected with a third joint of the first three-way valve (7), the second joint is connected with the infusion tube (13), the other end of the infusion tube (13) is communicated with the infusion bag (14), and the third joint is connected with the infusion piece (11).

3. The bladder pressure measurement device according to claim 1, wherein: the bladder pressure measuring device also comprises a urine collecting component, wherein the urine collecting component comprises a urination joint (2) communicated with the connecting end, a urine tube with one end communicated with the urination joint (2) and a urine bag with the other end communicated with the urine tube.

4. The bladder pressure measurement device according to claim 1, wherein: the bladder pressure measuring device further comprises a limiting component of the main body catheter (1), the limiting component comprises a balloon (4) and a filling connector (3), the balloon (4) is arranged outside the bladder insertion end, the filling connector (3) is arranged on the connecting end, and a filling channel which is communicated with the balloon (4) and the filling connector (3) is arranged in the tube wall of the main body catheter (1).

5. The bladder pressure measurement device according to claim 1, wherein: the pressure measuring assembly further comprises an extension conduit (6) connected between the pressure measuring joint (5) and the pressure sensor (8).

6. The bladder pressure measurement device according to claim 1 or 2, wherein: the liquid injection part (11) comprises a connecting pipe, a liquid storage cylinder, a piston shaft, a piston handle, a supporting handle and a sterile sleeve (15), wherein the connecting pipe is arranged at the front end of the liquid storage cylinder and is communicated with the inner cavity of the liquid storage cylinder; the two ends of the sterile sleeve (15) are respectively connected with the supporting handle and the piston handle in a sealing way.

7. The bladder pressure measurement device according to claim 1, wherein: the pressure sensor (8) is connected with a wire (9), and the other end of the wire (9) is provided with a connecting plug which can be inserted on the monitor.

8. The bladder pressure measurement device according to claim 1, wherein: the bladder pressure measuring device further comprises a fixing component for fixing the positions of the pressure sensor (8) and the liquid injection component, the fixing component comprises a fixing plate (10) for fixing the pressure sensor (8) and the liquid injection component and a fixing piece for fixedly mounting the fixing plate (10) at a preset position, and the fixing piece can be a fixing belt or a fixing buckle.