WO2019041410A1

WO2019041410A1 - Disposable temperature and pressure measuring catheter

Info

Publication number: WO2019041410A1
Application number: PCT/CN2017/103092
Authority: WO
Inventors: 陈云; 李维勤
Original assignee: 珠海沃姆电子有限公司
Priority date: 2017-08-28
Filing date: 2017-10-11
Publication date: 2019-03-07
Also published as: CN208641505U

Abstract

A disposable temperature and pressure measuring catheter, comprising: a catheter body (10), a pressure sensor (43), and a three-way valve (20). The catheter body (10) is internally provided with: independent of one another, a urine guiding passage (13), a fluid injection and discharge passage (16) and a temperature sensor signal line (32). The front end of the catheter body (10) is provided with a urine guiding hole (11), and the rear end thereof is provided with a urine outlet (12); the urine guiding passage (13) is connected between the urine guiding hole (11) and the urine outlet (12). The pressure sensor (43) is fixedly encapsulated within a pressure sensor cavity at the rear end of the catheter body (10). A first port (21) of the three-way valve (20) is connected to the rear end of the fluid injection and discharge passage (16); a second port (22) is in communication with the pressure sensor cavity; and a third port (23) is a fluid injection and discharge port.

Description

One-time temperature measurement and pressure catheter

[0001] The present invention relates to medical devices for measuring fluid temperature and pressure in vivo, and more particularly to disposable temperature measuring pressure catheters. The present invention is based on a Chinese utility model patent application whose application date is August 28, 2017, and the application number is 201721087174.1, the content of which is incorporated herein by reference.

Background technique

[0002] Existing catheters are often used in conjunction with a monitor, and medical personnel use the monitor to understand the temperature and pressure of urine in the patient.

[0003] The utility model patent CN205649494U discloses a bladder pressure detecting device, which is a temperature measuring pressure measuring catheter, which comprises a tube body and a pressure sensor assembly, and a temperature sensor assembly, which is detachable by a pipe joint Connected to the pressure detecting end of the pipe, and the pressure sensor is disposed at one end of the pipe joint away from the pressure detecting end, so that the pressure sensor is disposed away from the urinary tract, on the one hand, the urine does not contaminate the pressure sensor, and on the other hand, since the pressure sensor is Removably connected to the pressure detecting end, after directly removing the pressure sensor, the sensor can be directly reused, thereby controlling the manufacturing cost of the temperature measuring pressure measuring catheter. technical problem

[0004] However, the cost of a pressure sensor accounts for a small proportion of the cost of a temperature measuring pressure catheter. On the other hand, disassembly of the sensor and disinfection also requires cost, more importantly, the sensor is not contaminated by pollution. Thoroughly, re-use can pose a cross-infection threat to patients.

[0005] Further, since the pressure sensor is disposed between the sensor check valve and the air bag, when it injects fluid from the injection pipe into the air bag or discharges the fluid, the fluid flows through the pressure sensor, which causes the pressure to be throughout the injection or discharge period. Dynamic changes occur within the peak, and the peak or valley value may exceed the threshold, resulting in false alarms, which is not conducive to monitoring by the monitor.

Problem solution

Technical solution

[0006] The main object of the present invention is to provide an effective avoidance of a patient being infected and capable of outputting a smooth pressure signal. Sexual temperature measurement pressure catheter.

In order to achieve the above main object, the present invention provides a disposable temperature measuring and pressure measuring catheter comprising a tube body, a pressure sensor and a three-way valve. The tube body is provided with independent catheterization channels, fluid injection and discharge channels, and temperature sensor signal lines. The front end of the tube body is provided with a urinary hole, and the rear end is provided with a urinary venting port, and the urinary passage is connected between the urinary hole and the urination port. A temperature sensor is arranged in the tube of the proximal urinary hole, and the temperature sensor signal line connected to the temperature sensor is passed through the rear section of the tube body and connected to a signal plug. The front portion of the tubular body is provided with an air bag, and the front end of the fluid injection discharge passage is connected to the air bag. The pressure sensor is sealed in the pressure sensor cavity at the rear end of the pipe body. The first port of the three-way valve is connected to the rear end of the fluid injection passage, the second port of the three-way valve is connected to the pressure sensor chamber, and the third port of the three-way valve is a fluid injection discharge port. The three-way valve has a first valve position that allows the first port to communicate only with the second port, and a second valve position that allows the first port to communicate only with the third port.

[0008] Another disposable temperature measuring pressure catheter provided by the present invention includes a tube body, a pressure sensor and a Robert tube clamp. The tube body is provided with independent catheter guiding channels, fluid injection and discharge channels and temperature sensor signal lines. The front end of the tube body is provided with a urinary hole, and the rear end is provided with a urinary vent, and the urinary passage is connected between the urinary hole and the urination port. A temperature sensor is arranged in the tube of the proximal urinary catheter, and the temperature sensor signal line connected to the temperature sensor is passed through the rear section of the tube body and connected to a signal plug. The front portion of the pipe body is provided with an air bag, and the front end of the fluid injection discharge passage is connected to the air bag, and the rear end of the fluid injection discharge passage is connected to the fluid injection discharge port. The pressure sensor is sealed in the pressure sensor chamber at the rear end of the tube body. The pressure sensor chamber communicates with the fluid through the sensor channel to the discharge channel. The Robert tube clamp is used to selectively block the pressure sensor channel or the fluid injection discharge port near the discharge port.

[0009]

Advantageous effects of the invention

Beneficial effect

[0010] The first aspect of the present invention can effectively avoid the hidden troubles caused by the possible contamination of the disassembled parts and the potential pollution, and make the pressure signal output smooth.

[0011] Another aspect of the present invention has the characteristics of relatively simple structure and lower cost.

Brief description of the drawing

DRAWINGS

1 is a perspective view of a first embodiment of the present invention; 2 is a structural exploded view of the pressure sensor seat and the three-way valve in the first embodiment;

3 is a cross-sectional view of the pressure sensor holder, the pressure sensor cable, and the three-way valve omitted in FIG. 1;

Figure 4 is a partial enlarged view of A in Figure 3;

[0016] FIG. 5 is a schematic view of the three-way valve in a first valve position;

Figure 6 is a cross-sectional view of the three-tube axis of the three-way valve of Figure 5;

[0018] FIG. 7 is a schematic view of the three-way valve in a second valve position;

Figure 8 is a cross-sectional view of the three-tube axis of the three-way valve of Figure 7;

9 is a schematic structural view of a fluid injection and discharge passage and a pressure sensor chamber in a rear portion of a pipe body in a second embodiment. [0020] FIG.

[0021] The present invention will be further described below in conjunction with the embodiments and the accompanying drawings.

Embodiments of the invention

[0022] The present invention is mainly directed to the prior art urinary catheter, in particular, the structural improvement of the urinary catheter of CN205649494U, the following embodiments only explain the structure closely related to the present invention, one-time temperature measurement The other structures and materials of the pressure urinary catheter which are identical to the prior art can be understood and implemented by those skilled in the art based on the technical contents of the prior art urinary catheter. Therefore, these structures and materials will not be separately described.

[0023] In order to clearly explain the present invention, the ratio between the above figures is not uniform, and is only a schematic diagram for understanding the technical solution of the present invention. Further, the front end and the rear end referred to in the present invention refer to a region close to the end surface, and the front and rear portions refer to a region relatively far from the end surface.

First Embodiment

[0025] Referring to FIG. 1, the tube 10 of the disposable temperature measuring and pressure measuring catheter is a hose, the front end is provided with a urinary hole 11, the rear end is provided with a urinary opening 12, and the front part is provided with an air bag 17. The rear section of the pipe body 10 passes through the signal line of the temperature sensor and the signal plug 33. The pressure sensor case 40 is disposed at the rear end of the pipe body 10, and the signal cable 44 of the pressure sensor passes through the pressure sensor case 40 and is connected to the socket 45. The three-way valve 20 is disposed at the rear end of the fluid injection discharge passage. The disposable catheter is sealed in a vacuum bag after disinfection, used for unpacking, discarded or destroyed after use.

[0026] Referring to FIG. 2, the pressure sensor case 40 is composed of a plastic body 41 and a bottom cover 42 through gluing or super The sonic welding or the like is hermetically connected to form a pressure sensor chamber, and the pressure sensor 43 is non-detachably fixed and sealed in the pressure sensor chamber. The pressure sensor cartridge 40 can be integrally formed with the valve seat of the three-way valve 20, the first port 21 of the three-way valve 20 is fixedly connected to the rear end of the fluid injection discharge passage, and the second port 22 of the three-way valve 20 is connected to the sensor chamber. The third port 23 of the three-way valve 20 is sealed by the end cap 24, and the third port of the end cap 24 is opened as a fluid injection discharge port.

Referring to FIGS. 3 and 4, the tube body 10 is provided with mutually independent urinary passages 13 and a fluid injection discharge passage 16, and a temperature sensor signal line 32. The front end of the catheterization passage 13 is a catheterization port 11, and the rear end is a urination port 12 for selectively discharging urine in the bladder to the urine bag. The temperature sensor 31 is disposed in the vicinity of the urinary catheter 11, and transmits the temperature signal of the urine to the monitor through the temperature sensor signal line 32 and the signal plug 33. The front end 14 of the fluid injection discharge passage 16 is connected to the air bag 17, and the rear end 15 is connected to the first port 21 of the three-way valve 20, and after injecting a certain amount of fluid through the third port, the air bag 17 expands as shown in Fig. 3 and Fig. 4, and is not injected. The state of the air bag 17 after fluid or discharge of fluid is as shown in FIG.

[0028] Referring to FIG. 5 and FIG. 6, when the three-way valve 20 is in the second valve position 图 shown in FIG. 5, that is, the valve handle 25 is thrown in the position shown in FIG. 5, the spool 26 is turned to only the first port 21 and The third port 23 is in communication, and the second port 22 is in a valve-off state, in which state the fluid can be injected or discharged into the air bag 17 through the third port 23, and the pressure sensor chamber 46 that is broken by the valve is not subjected to injection or discharge. The impact of fluid turbulence.

[0029] Referring to FIG. 7 and FIG. 8, when the three-way valve 20 is in the first valve position 图 shown in FIG. 7, that is, the valve handle 25 is thrown in the position shown in FIG. 7, the spool 26 is turned to only the first port 21 and The second port 22 is in communication, and the third port 23 is in a valve-off state. In this state, the pressure in the bladder is sequentially transmitted to the pressure sensor 43 through the fluid in the air bag 17, the fluid injection discharge channel 16, and the pressure sensor chamber 46, and the pressure sensor 43 The pressure signal is transmitted to the monitor through the signal cable 44 and the drain 45.

[0030] Second Embodiment

[0031] Hereinafter, only the difference between this example and the above example will be described. Referring to FIG. 9, after one end 25 of a three-way hose 2 is fixedly connected to the rear end 15 of the pipe body 10, the fluid injection discharge passage 16 is extended to the fluid. The discharge port 26 is injected, and the pressure sensor chamber 46 communicates with the fluid injection discharge passage 16 through the pressure sensor passage 24. A Robert tube clamp 5 selectively blocks the fluid injection passage of the pressure sensor passage or the fluid injection discharge port near the crucible, and FIG. 9 shows the state in which the Robert tube clamp is located near the fluid injection discharge passage of the fluid injection discharge port 26. The Robert tube clamp 5 shown in Fig. 9 is not in the blocked state, that is, it is not in the clamped state, and it is clamped. 吋, the pressure in the bladder is sequentially transmitted to the pressure sensor 43 through the fluid in the bladder 17, the fluid injection discharge passage 16, and the pressure sensor chamber 46, and the pressure sensor 43 transmits the pressure signal to the monitor through the signal cable 44 and the discharge port 45. . When the Robert tube clamp 5 is placed on the pressure sensor passage 24 and clamped, the fluid can be injected or discharged into the air bag 17 through the fluid injection discharge port, and the pinched pressure sensor chamber 46 is not subject to the injection fluid or the discharge fluid. The impact of stress.

Industrial Applicability

[0033] Compared with the prior art, the first aspect of the present invention is that the pressure sensor is solid-sealed in the pressure sensor cavity at the rear end of the pipe body, so that the disposable temperature measuring pressure measuring catheter can be discarded or directly destroyed, effectively avoiding The potential for contamination of the disassembled parts to be used again. Since the three-way valve is used, when it is in the second valve position 吋, the air bag can be filled with fluid or discharged from the air bag through the fluid injection discharge port, and the pressure sensor does not have a fluid impact during charging or discharging. , so that the pressure signal output is smooth; when it is in the first valve position, normal pressure monitoring can be performed.

[0034] Another solution has the same advantages as the prior art compared with the prior art, and has a relatively simple structure.

, the cost is cheaper.

[0035]

Claims

Claim

1. One-time temperature measurement and pressure catheter, including

a tube body, wherein the tube body is provided with independent catheter guiding channels, fluid injection and discharge channels and temperature sensor signal lines;

The front end of the pipe body is provided with a urinary hole, and the rear end is provided with a urination port, and the urinary passage is connected between the urinary hole and the urinary vent;

a temperature sensor is disposed in the tube body of the proximal urinary hole, and the temperature sensor signal line connecting the temperature sensor passes through a rear portion of the tube body and is connected to a signal plug;

The front section of the pipe body is provided with an air bag, and the front end of the fluid injection discharge channel is connected to the air bag;

a pressure sensor, the pressure sensor is fixed in a pressure sensor cavity at a rear end of the pipe body; a three-way valve, a first port of the three-way valve is connected to a rear end of the fluid injection discharge passage, the three-way a second port of the valve is connected to the pressure sensor chamber, and a third port of the three-way valve is for fluid injection and discharge

P ;

The three-way valve has a first valve position that allows the first port to communicate only with the second port, and a second valve position that causes the first port to communicate only with the third port.

2. One-time temperature measurement and pressure catheter, including

The front portion of the pipe body is provided with an air bag, the rear portion of the pipe body is provided with a fluid injection discharge port, the front end of the fluid injection discharge channel is connected to the air bag, and the rear end of the fluid injection discharge channel is connected to the fluid. Inject into the discharge port;

It is characterized by:

a pressure sensor, the pressure sensor is fixed in a pressure sensor cavity at a rear end of the pipe body; the pressure sensor cavity communicates with the fluid injection discharge passage through a pressure sensor passage; a Robert pipe clamp for selectively blocking The pressure sensor channel or the fluid injection and discharge The fluid near the mouth is injected into the discharge passage.