Medical connector for pressure monitoring

Abstract

The utility model belongs to the technical field of medical instruments, and particularly relates to a pressure monitoring medical connector which comprises a connector main pipe, a first Luer connector is arranged at the front end of the connector main pipe, a first Luer interface is arranged at the rear end of the connector main pipe, and a sealing cap or an anticoagulation flushing assembly is connected to the first Luer interface. The side wall of the connector main pipe is provided with a first connector communicated with the connector main pipe, and the first connector is connected with a pressure monitoring device. The pressure detection device comprises a non-precise type and a precise type, and the anti-coagulation flushing assembly comprises an elastic bag type and an infusion apparatus type, so that the pressure detection device can be applied to various clinical pressure measurement items needing pressure measurement through multiple combinations, the compatibility is strong, and the effect that one object has multiple purposes is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, in particular to a pressure monitoring medical connector. Background Art

[0002] At present, the only clinically applicable equipment for various pressure monitoring needs (spinal puncture pressure measurement, continuous epidural or subarachnoid pressure measurement, endotracheal tube balloon pressure monitoring, central venous pressure monitoring, invasive arterial pressure monitoring) is a pressure transducer connected to a monitor. However, the existing pressure transducer (such as patent ZL200920130514.3) integrates an anticoagulant infusion tube and a flow-limiting flushing valve switch, which has a complex structure, high application cost, and wastes consumables for pressure measurement items that do not require anticoagulation (spinal puncture catheterization pressure measurement, balloon pressure monitoring, and intermittent central venous pressure measurement). Even for continuous invasive arterial or central venous pressure monitoring that requires anticoagulation, the infusion anticoagulation system is large and heavy and inconvenient to transport, and the anticoagulant needs to be pressurized by an infusion pressurization bag. The reuse of pressurization bags will increase cross-infection, occupy infusion and blood transfusion bag resources, and need to be recycled after the patient is transported between departments after reuse. Patent No. ZL201520638839.8, entitled "Positive Pressure Continuous Fluid Infusion Device, Indwelling Venous Needle, and Central Venous Catheter", proposes a disposable continuous positive pressure tube sealing device, but it does not have a quick flushing switch and channel. It is especially inconvenient for those who have just completed arterial puncture and need to quickly flush the tube for anticoagulation with one hand, and for those who have drawn blood through the arteriovenous channel and need to flush the tube for anticoagulation. The speed is slow and blood coagulation is easy to occur.

[0003] Existing patent: A spinal cannula connector with pressure color display (patent number: ZL202221541624.0), which has a relatively simple structure and is portable. However, the manometer and the spinal cannula connector are designed as an integrated whole. Since the front end of the spinal cannula connector is not a standard Luer connector, it can only be connected to an epidural tube or a subarachnoid tube for continuous epidural or subarachnoid pressure measurement. It cannot be used for other projects that require pressure measurement (during epidural puncture, spinal anesthesia puncture, before medication; endotracheal tube balloon pressure measurement, central venous pressure measurement, invasive arterial pressure measurement). The color display of its pressure range is not an accurate pressure measurement. In addition, the manometer and the spinal cannula connector are designed as an integrated whole. In addition to being limited in use, the cost of production will increase. The indicator sheet of the color display pressure gauge will increase the measurement error. When used for balloon pressure monitoring, a second interface and a pressure assessment cap are not required. Utility Model Content

[0004] In order to solve the problems in the above-mentioned background technology, the utility model provides a pressure monitoring medical connector, which can be applied to various projects requiring pressure measurement, has a wide application range and is low in cost.

[0005] The utility model adopts the following technical solutions:

[0006] A pressure monitoring medical connector comprises a connector main pipe, a first Luer connector is arranged at the front end of the connector main pipe, a first Luer interface is arranged at the rear end of the connector main pipe, and a sealing cap or an anticoagulant flushing component is connected to the first Luer interface;

[0007] A first interface communicating with the joint main pipe is arranged on the side wall of the joint main pipe, and a pressure monitoring device is connected to the first interface.

[0008] In one technical solution, the pressure monitoring device includes a cylindrical tube with openings at both ends and a pressure indicating rod that moves up and down in the cylindrical tube. The cylindrical tube is connected to the first interface. The cylindrical tube is a hollow transparent cylindrical tube. The end of the cylindrical tube away from the first interface is sealed and covered with an elastic bellows. The center of the elastic bellows is provided with a pressure indicating rod; a pressure color display scale is provided on the outer wall of the cylindrical tube along the axial direction.

[0009] In one technical solution, the pressure monitoring device includes a cylindrical tube with openings at both ends and a pressure indicator that moves up and down in the cylindrical tube. The cylindrical tube is connected to the first interface. The cylindrical tube is a hollow opaque cylindrical tube. One end of the cylindrical tube away from the first interface is connected to the atmosphere. The pressure indicator includes an indicator rod and a piston plate arranged at the lower end of the indicator rod. A spring is sleeved on the indicator rod. One end of the spring is fixed to the piston plate, and the other end is fixed to one end of the cylindrical tube. The outer surface of the indicator rod is coated with different pressure range colors.

[0010] In one technical solution, the pressure monitoring device includes a piezoelectric sensor box connected to a first interface and a monitor host arranged outside the piezoelectric sensor box, a medical tee is also arranged between the connector main pipe and the first Luer connector, a piezoelectric sensor is attached to the inner wall of the piezoelectric sensor box, and a first transmission line is connected to the piezoelectric sensor; the first transmission line extends to the outside and is electrically connected to the second transmission line on the monitor host.

[0011] Furthermore, a connection interface is provided on the end of the first transmission line away from the piezoelectric sensor box, and a connection connector is provided on the end of the second transmission line away from the monitor host, and the connection connector is plugged into the connection interface; a retractable sterile protective cover is provided on the end of the first transmission line close to the connection interface.

[0012] Furthermore, it also includes a mounting frame fixed on the infusion stand by a locking device, and the monitor host is fixedly arranged on the mounting frame.

[0013] In one technical solution, the anticoagulant flushing assembly includes a second Luer connector, a first connecting tube, a second connecting tube and an injection check valve which are sequentially connected to the first Luer interface; an axially extending partition is provided in the first connecting tube, and the partition divides the cavity of the first connecting tube into a first cavity and a second cavity which are arranged in parallel; a non-flow-limiting tube is provided in the first cavity, an opening is provided on the side wall of the first cavity, a non-flow-limiting tube clamp is provided next to the opening, and a flow-limiting tube is provided in the second cavity;

[0014] A plurality of through holes are provided on the side wall of the second connecting pipe, and an elastic bag is fixed to the outer periphery of the second connecting pipe by an elastic fixing belt, and the elastic bag covers the through holes.

[0015] In one technical solution, the anticoagulation flushing assembly includes a third Luer connector, a third connecting tube and an infusion set connected to the first Luer interface in sequence, the end of the third connecting tube connected to the infusion set has a second Luer interface, and the infusion set is plugged and connected to the second Luer interface;

[0016] An axially extending partition is provided in the third connecting tube, and the partition divides the cavity of the third connecting tube into a first cavity and a second cavity connected in parallel. A non-flow-limiting tube is provided in the first cavity, an opening is provided on the side wall of the first cavity, and a non-flow-limiting tube clamp is provided next to the opening. A flow-limiting tube is provided in the second cavity.

[0017] Furthermore, a second interface is provided on the joint main pipe, and a pressure assessment cap is provided on the second interface. The pressure assessment cap includes a sealing cap body with openings at both ends and a coreless flat membrane provided on the surface of the sealing cap body.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] (1) The pressure monitoring medical connector of the utility model realizes the wide compatibility of the medical connector by providing the first Luer connector and the first Luer interface, achieving the effect of one item for multiple uses, and is suitable for monitoring various clinical pressures.

[0020] (2) The pressure monitoring device of the pressure monitoring medical connector of the utility model includes an accurate display type and an inaccurate display type, which can be used for pressure monitoring projects that do not require anticoagulation, such as continuous balloon pressure monitoring, intermittent central venous pressure monitoring, continuous epidural or subarachnoid catheter pressure measurement, pressure measurement during epidural puncture or arachnoid puncture, etc., using an inaccurate display type with color display of the pressure range or a piezoelectric sensor accurate display type + ordinary Luer connector sealing cap.

[0021] (3) The pressure monitoring medical connector of the utility model also includes an anticoagulation flushing component, which can be used in pressure monitoring projects that require anticoagulation, such as continuous invasive arteriovenous pressure measurement that requires anticoagulation and continuous arteriovenous pressure measurement. Compared with the infusion set, infusion bag, pressurized bag, and anticoagulation flushing flow limiting valve required by the existing transducer, the structure is simpler, the production cost is low, the volume and weight are smaller, and it is convenient to transport.

[0022] (4) When using piezoelectric sensors for precise monitoring, the monitor host is equipped with multiple monitoring channels, which can monitor multiple items according to the selected combination. The monitor host can be fixed on the infusion stand by a locking device for easy observation. A sterile protective cover is provided at the far end of the first transmission line connected to the piezoelectric sensor. The length of the first transmission line is less than that of the second transmission line, which minimizes the consumption of the disposable first transmission line. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a plan view of the pressure monitoring medical connector (bellows type) of Example 1;

[0025] Figure 2 A plan view of another embodiment of the pressure monitoring medical connector (bellows type) of the first embodiment;

[0026] Figure 3 A 3D exploded view of the pressure monitoring medical connector (bellows type) of Example 1;

[0027] Figure 4 It is a plan view of the pressure monitoring medical connector (spring type) of Example 2;

[0028] Figure 5 A plan view of a piezoelectric sensor type pressure monitoring medical connector according to Embodiment 3;

[0029] Figure 6 It is a structural diagram of the anticoagulation flushing component (elastic sac type) of Example 4;

[0030] Figure 7 It is a structural diagram of the anticoagulation flushing assembly (infusion set type) of Example 5;

[0031] Figure 8 This is a structural diagram of the connection between the piezoelectric sensor and the monitor host in Example 3;

[0032] Fig. 9 A connection structure diagram of a non-precise display type pressure monitoring device used for measuring pressure during epidural puncture;

[0033] Fig.10 A connection structure diagram of a non-precise display type pressure monitoring device used for pressure measurement during arachnoid puncture;

[0034] Fig.11 A connection structure diagram of a non-precise display type pressure monitoring device used for epidural or subarachnoid catheterization and pressure measurement;

[0035] Fig.12 A non-precise display type pressure monitoring device is used for central venous intermittent pressure measurement connection structure diagram;

[0036] Fig.13 This is a connection structure diagram of a non-precise display type pressure monitoring device combined with a three-way + syringe for continuous airbag pressure monitoring and adjustable airbag pressure;

[0037] Fig.14 Piezoelectric sensor connector + sealing cap or non-precise display pressure monitoring device is used for monitoring items that do not require anticoagulation. Connection structure diagram;

[0038] Fig.15 Connection structure diagram of piezoelectric sensor connector + anticoagulation flushing assembly (elastic sac type) + infusion extension tube for continuous invasive arteriovenous pressure measurement;

[0039] Fig.16 Connection structure diagram of piezoelectric sensor connector + anticoagulant flushing assembly (infusion set type) + infusion bag + pressurized bag + infusion extension tube for continuous invasive arteriovenous pressure measurement.

[0040] Wherein: connector main pipe 1.1; first Luer connector 1.2; first Luer interface 1.3; sealing cap 1.4.1; first interface 1.5; pressure detection device 1.6; transparent cylindrical tube 1.6.1; elastic bellows 1.6.2; pressure indicator rod 1.6.3; pressure color display scale 1.6.4; second interface 1.7; pressure evaluation cap 1.8;

[0041] Opaque cylindrical tube 2.6.1; piston plate 2.6.2; spring 2.6.3; indicator rod 2.6.4;

[0042] Medical tee 3.1; piezoelectric sensor box 3.2; piezoelectric sensor 3.3; first transmission line 3.4; monitor host 3.5; second transmission line 3.6 sterile protective film 3.7;

[0043] Anticoagulation flushing assembly (elastic bag type) 1.4.2; second Luer connector 1.4.2.1; second connecting tube 1.4.2.2; elastic bag 1.4.2.3; fixing belt 1.4.2.4; one-way injection valve 1.4.2.5; first flow limiting tube 1.4.2.6; first non-flow limiting tube 1.4.2.7; first non-flow limiting tube clamp 1.4.2.8; first connecting tube 1.4.2.9; first partition 1.4.2.10;

[0044] Anticoagulant flushing assembly (infusion set type) 1.4.3; third Luer connector 1.4.3.1; third connecting tube 1.4.3.2; second Luer interface 1.4.3.3; infusion set 1.4.3.4, second flow limiting tube 1.4.3.5; second non-flow limiting tube 1.4.3.6; second partition 1.4.3.7; second non-flow limiting tube clamp 1.4.3.8. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the utility model.

[0046] The following is combined with Figure 1 To Attachment Fig.16 And specific embodiments are described in detail.

[0047] like Figure 1-16 As shown, the utility model provides a pressure monitoring medical connector, including a connector main pipe 1.1, the front end of the connector main pipe 1.1 is provided with a first Luer connector 1.2, the first Luer connector 1.2 is a standard Luer connector, which can be connected to a variety of different types of tubes, expanding the use range of the medical connector; the rear end of the connector main pipe 1.1 is provided with a first Luer interface 1.3, the first Luer interface 1.3 is connected with a sealing cap 1.4.1 or an anticoagulant flushing component (which can be an anticoagulant flushing component (elastic sac type) 1.4.2 or an anticoagulant flushing component (infusion The sealing cap 1.4.1 and the anticoagulation flushing assembly can be applied to different types of pressure monitoring. For example, the sealing cap 1.4.1 can be used for pressure monitoring projects that do not require anticoagulation, and the anticoagulation flushing assembly is used for pressure monitoring projects that require anticoagulation. They can be selected according to needs during use; a first interface 1.5 that is connected to the joint main pipe 1.1 is provided on the side wall of the joint main pipe 1.1, and a pressure monitoring device 1.6 is connected to the first interface 1.5. The pressure monitoring device 1.6 can be selected into two types: precise display type and non-precise display type.

[0048] The utility model realizes the wide compatibility of the medical connector by arranging the first Luer connector 1.2 and the first Luer interface 1.3, realizes the effect of one object with multiple uses, and is suitable for monitoring various clinical pressures.

[0049] Embodiment 1:

[0050] like Figure 1 As shown, the pressure monitoring device 1.6 is of a non-precise display type. The pressure monitoring device 1.6 includes a cylindrical tube with openings at both ends and a pressure indicating rod 1.6.3 that moves up and down in the cylindrical tube. The cylindrical tube is connected to the first interface 1.5 and communicated with the joint main pipe 1.1. The cylindrical tube is a hollow transparent cylindrical tube 1.6.1. One end of the transparent cylindrical tube 1.6.1 away from the first interface 1.5 is sealed and covered with an elastic bellows 1.6.2. The elastic bellows 1.6.2 is made of a small-diameter bellows or a variable-diameter bellows made of elastic material. A pressure indicating rod 1.6.3 made of lightweight material is provided at the center of the elastic bellows 1.6.2; a pressure color display scale 1.6.4 is provided on the outer wall of the cylindrical tube along the axial direction, and different colors displayed for different pressure measurement items may be different, such as blue below 0 mmHg; white from 0 to 5 mmHg; green from 5 to 15 mmHg; yellow from 15 to 30 mmHg; and red above 30 mmHg. The specific color setting and the definition of the pressure range shall be adaptively designed by technical personnel in this field according to the actual application scenario.

[0051] Preferably, the joint main pipe 1.1 of the first embodiment is further provided with a second interface 1.7, and a pressure assessment cap 1.8 is provided on the second interface 1.7. The pressure assessment cap 1.8 comprises a sealing cap body with openings at both ends and a coreless flat film provided on the surface of the sealing cap body. The flat film is made of a plastic film or other elastic material film, and the flat film is wrapped around the surface of the sealing cap body. The second interface 1.7 and the pressure assessment cap 1.8 are optional technical features, and the second interface 1.7 and the pressure assessment cap 1.8 may not be required when detecting certain pressures, such as airbag pressure monitoring.

[0052] Embodiment 2:

[0053] like Figure 4As shown, the pressure monitoring device 1.6 is of a non-precise display type. The pressure monitoring device 1.6 includes a cylindrical tube with openings at both ends and a pressure indicator that moves up and down in the cylindrical tube. The cylindrical tube is connected to the first interface and communicated with the joint main pipe. The cylindrical tube is a hollow opaque cylindrical tube 2.6.1. One end of the opaque cylindrical tube 2.6.1 away from the first interface 1.5 is communicated with the atmosphere. The pressure indicator includes an indicator rod 2.6.4 and a piston sheet 2.6.2 arranged at the lower end of the indicator rod 2.6.4. The indicator rod 2.6.4 is located at the movable The center of the circle of the plug piece 2.6.2, the piston piece 2.6.2 can seal the lumen of the cylindrical tube and move up and down along the lumen. A spring 2.6.3 is sleeved on the indicator rod 2.6.4. One end of the spring 2.6.3 is fixed to the piston piece 2.6.2, and the other end is fixed to the top of the cylindrical tube. The outer surface of the indicator rod 2.6.4 is coated with different pressure range color displays. According to the indicator rod 2.6.4 extending from the top of the cylindrical tube, the pressure range is judged by observing the color display on the part of the indicator rod 2.6.4 extending from the cylindrical tube during the pressure measurement process.

[0054] Preferably, the joint main pipe 1.1 in the second embodiment is further provided with a second interface 1.7, and a pressure assessment cap 1.8 is provided on the second interface 1.7. The pressure assessment cap 1.8 includes a sealing cap body with openings at both ends and a coreless flat film arranged on the surface of the sealing cap body. The material of the flat film is a plastic film or other elastic material film, and the flat film is wrapped around the surface of the sealing cap body.

[0055] The non-precise display type pressure monitoring device in the above-mentioned embodiment 1 and embodiment 2 can be applied to a variety of pressure measurement scenarios, and some application examples are as follows:

[0056] like Fig. 9 or Fig.10 As shown, it is applied to pressure measurement during epidural or arachnoid puncture, and the specific pressure measurement process is: when measuring pressure during epidural puncture, first remove the sealing cap 1.4.1 on the first Luer interface 1.3, and when the epidural needle enters the intermuscular ligament, pull out the needle core and connect it to the first Luer connector 1.2, and the first Luer interface 1.3 is connected to a syringe with a small amount of saline, and the pressure during epidural puncture can be monitored in real time through the pressure color display scale; when measuring pressure during arachnoid puncture, first remove the sealing cap 1.4.1 on the first Luer interface 1.3, and when the spinal anesthesia needle is used to puncture the subarachnoid membrane, pull out the needle core and connect it to the first Luer connector 1.2, and the first Luer interface 1.3 is connected to a syringe containing spinal anesthetic, and the amount of spinal anesthetic can be adjusted according to the real-time pressure of the subarachnoid space.

[0057] like Fig.11As shown, the first Luer connector 1.2 of the pressure monitoring medical connector is connected to the epidural catheter or the subarachnoid catheter, and the first Luer interface 1.3 uses an ordinary Luer sealing cap or is connected to a syringe, so that the pressure of the epidural or subarachnoid space can be continuously measured, and the dosage and speed of administration can be selected according to the monitored pressure.

[0058] like Fig.12 As shown, the first Luer connector 1.2 of the pressure monitoring medical connector is connected to the central venous infusion tee, the tee is located flush with the right atrium, the infusion end is connected to exhaust the air, and then the sealing cap 1.4 on the first Luer interface is tightened, and the venous end is connected through the tee to measure the pressure intermittently, which does not require anticoagulation and can prevent air from entering the vein due to negative pressure.

[0059] like Fig.13 As shown, the first Luer connector 1.2 of the monitoring medical connector can be directly connected to the three-way + syringe, and one of the connectors of the three-way is screwed tightly with the one-way valve of the endotracheal tube inflation, and the airbag pressure can be adjusted while monitoring the airbag pressure. It should be noted that the connector main pipe required for airbag pressure monitoring does not require a second interface and a pressure assessment cap.

[0060] Embodiment three:

[0061] like Figure 5 As shown, the pressure monitoring device 1.6 is of a precise display type, comprising a piezoelectric sensor box 3.2 connected to the first interface 1.5 and a monitor host 3.5 arranged outside the piezoelectric sensor 3.2 box, a medical tee 3.1 is further arranged between the connector main pipe 1.1 and the first Luer connector 1.2, a piezoelectric sensor 3.3 is attached to the inner wall of the piezoelectric sensor box 3.2, preferably, the piezoelectric sensor 3.3 is a piezoelectric film sensor, and a first transmission line 3.4 is connected to the piezoelectric sensor 3.3; the first transmission line 3.4 extends to A connection interface is provided at one end of the outside, a second transmission line 3.6 is provided on the monitor host 3.5, the length of the second transmission line 3.6 is greater than the length of the first transmission line 3.4, a connection connector is provided at the end of the second transmission line 3.6 away from the monitor host 3.5, and the connection connector is plugged into the connection interface to realize the electrical connection between the first transmission line 3.4 and the second transmission line 3.6; a retractable sterile protective cover 3.7 is provided at one end of the first transmission line 3.4 close to the connection interface, and the sterile protective cover 3.7 is used to avoid contaminating the operating table. Preferably, the monitor host 3.5 includes a plurality of second transmission lines 3.6, each of which is provided with a connection connector, which can be connected to multiple pressure monitoring medical connectors at the same time to realize pressure monitoring of multiple items.

[0062] Preferably, it also includes a mounting frame fixed to the infusion stand by a locking device, and the monitor host 3.5 is fixedly arranged on the mounting frame. The locking device can be arranged on the mounting frame or on the monitor host 3.5, and it only needs to be able to fix the monitor host 3.5 on the infusion stand, which all belongs to the protection scope of the present utility model.

[0063] like Fig.14 As shown, the precise display type pressure detection device of the third embodiment can be applied to monitoring items that do not require anticoagulation, that is, the sealing cap 1.4.1 is connected to the first Luer interface 1.3 to achieve pressure monitoring. Specifically, the first Luer connector 1.2 is connected to the endotracheal tube inflation check valve or the spinal canal catheter connector or the central venous three-way connector or the epidural or arachnoid puncture needle to accurately measure the pressure. Before the puncture needle measures the pressure in real time, hold the sterile protective cover 3.7 at the far end of the first transmission line 3.4, and then connect the first transmission line 3.4 to the second transmission line 3.6 on the monitor host 3.5. The sterile protective cover 3.7 can avoid contamination of the operating table; before measuring the pressure, the piezoelectric sensor can be aligned with the air through the medical three-way and then zeroed before measuring the pressure.

[0064] Embodiment 4:

[0065] The first Luer interface of the precise pressure monitoring device in Example 3 is connected to the anticoagulation flushing component (elastic sac type) 1.4.2, which is a pressurized anticoagulation flushing cap elastic sac type. The anticoagulation flushing component (elastic sac type) 1.4.2 includes a second Luer connector 1.4.2.1, a first connecting tube 1.4.2.9, a second connecting tube 1.4.2.2 and an injection check valve 1.4.2.5, which are sequentially connected to the first Luer interface 1.3. The first connecting tube 1.4.2.9 is a square tube shell or a cylindrical tube shell. An axially extending first partition 1.4.2.10 is provided in the first connecting tube 1.4.2.9. The first partition 3.1.2.10 divides the cavity of the first connecting tube 3.4.2.9 into a first cavity and a second cavity arranged in parallel. A first non-flow-restricting tube 1.4.2.7 is provided in the first cavity. The first cavity has an opening on its side wall, and a first non-flow-limiting tube clamp 1.4.2.8 is provided next to the opening; the second cavity has a first flow-limiting tube 1.4.2.6, the inner diameter of which is 0.05-0.15 mm, and the flow rate is 1-2 ml / h; the second connecting tube 1.4.2.2 is a plastic cylindrical tube with openings at both ends, and a plurality of through holes are provided on the side wall of the second connecting tube 1.4.2.2. Elastic bladders 1.4.2.3 are fixed on both sides of the outer periphery of the second connecting tube 1.4.2.2 with elastic fixing bands, and the elastic bladders 1.4.2.3 are made of silicone or rubber, and cover the through holes. The capacity of the elastic bladder 1.4.2.3 is 30-50 ml, and the pressure of the filled liquid can reach 200-300 mmHg.

[0066] Combining the anticoagulation flushing assembly (elastic bag type) 1.4.2 in the fourth embodiment with the accurate display type pressure monitoring device in the third embodiment can be applied to continuous invasive central venous pressure or arterial pressure monitoring that requires continuous anticoagulation and flushing anticoagulation. Fig.13 As shown, the first Luer connector 1.2 is connected to the infusion extension tube with a three-way connection, and the second Luer connector 1.4.2.1 is connected to the first Luer interface 1.3. Before use, 30-50ml of heparin anticoagulant is injected into the elastic bag 1.4.2.3 at a pressure of 200-300mmHg. The air in the tube is emptied by pressing the first non-flow-restricting tube clamp 1.4.2.8. The front end of the infusion extension tube is connected to the arterial cannula or central venous catheter. The piezoelectric sensor 3.3 is placed in the right atrium, and the medical three-way is rotated horizontally to zero the air before measuring the pressure. When rapid flushing is required, the first non-flow-restricting tube clamp 1.4.2.8 can be pressed, and the first non-flow-restricting tube clamp 1.4.2.8 can be released to continuously anticoagulate, with a flow rate of 1-2ml / h.

[0067] The pressure test was conducted under the conditions that the thickness of the elastic bladder wall was 1mm and the anticoagulation flow rate of the first flow limiting tube was 2ml / h. The pressure comparison before and after the first flow limiting tube with different capacities was shown in the following table:

[0068] Anticoagulant fluid volume (ml) Pressure before flow restriction tube (mmHg) Pressure after flow restriction tube (mmHg) 50 250 5 40 238 4 30 233 3 20 232 3 10 230 2 5 228 2

[0069] Usually, the measured value of arterial pressure = actual arterial pressure - pressure behind the restrictor tube (average 3 mmHg); then the actual arterial pressure = measured value of arterial pressure + 3 mmHg;

[0070] It can be seen that the first flow limiting tube has little effect on arterial pressure measurement at a flow rate of 2 ml / h, and the average error in arterial pressure measurement is about 3 mmHg.

[0071] Embodiment five:

[0072] The first Luer interface of the precise pressure monitoring device in the third embodiment is connected to the anticoagulation flushing assembly (infusion set type) 1.4.3, which is a pressurized anticoagulation flushing cap infusion set type. The anticoagulation flushing assembly (infusion set type) 1.4.3 includes a third Luer connector 1.4.3.1, a third connecting tube 1.4.3.2 and an infusion set 1.4.3.4 which are sequentially connected to the first Luer interface 1.3. The third connecting tube 1.4.3.2 is a square tube shell or a cylindrical tube shell. The end of the third connecting tube 1.4.3.2 connected to the infusion set 1.4.3.4 has a second Luer interface 1.4.3.3. The infusion set 1.4.3.4 is plugged and connected to the second Luer interface 1.4.3.3. The third connecting tube 1.4. A second axially extending partition 1.4.3.7 is provided in 3.2, and the second partition 1.4.3.7 divides the cavity of the third connecting tube 1.4.3.2 into a first cavity and a second cavity connected in parallel. A second non-flow-restricting tube 1.4.3.6 is provided in the first cavity, an opening is provided on the side wall of the first cavity, and a second non-flow-restricting tube clamp 1.4.3.8 is provided next to the opening. A second flow-restricting tube 1.4.3.5 is provided in the second cavity, and the inner diameter of the second flow-restricting tube 1.4.3.5 is 0.05-0.15mm, and the flow rate is 1-2ml / h.

[0073] like Fig.14 As shown, the anticoagulant flushing assembly (infusion set type) 1.4.3 in Example 5 is combined with the precise display type pressure monitoring device in Example 3, wherein the first Luer connector 1.2 is connected to an infusion extension tube with a three-way connection, the infusion set on the second Luer interface 1.4.3.3 is plugged with an anticoagulant infusion bag, the anticoagulant infusion bag is pressurized to 200-300 mmHg by a pressurized bag, the air in the tube is emptied by pressing the second non-flow-limiting tube clamp 1.4.3.8 before use, the front end of the infusion extension tube is connected to the arterial cannula or the central venous catheter, the piezoelectric sensor 3.3 is placed at the right atrium level and zeroed before measuring the pressure, when rapid flushing is required, the second non-flow-limiting tube clamp 1.4.3.8 can be pressed, and continuous anticoagulation can be achieved by releasing the second non-flow-limiting tube clamp 1.4.3.8, with a flow rate of 1-2 ml / h.

[0074] It should be noted that the first connecting tube in the fourth embodiment and the third connecting tube in the fifth embodiment are integrally closed, and the first non-flow-restricting tube and the second non-flow-restricting tube therein mainly refer to pipes with an inner diameter greater than 1 mm. When rapid flushing is required, the first non-flow-restricting tube clamp or the second non-flow-restricting tube clamp is pressed to open the first non-flow-restricting tube or the second non-flow-restricting tube, and the flow rate therein can reach 20-50 ml / h, thereby achieving the effect of rapid flushing of the pipeline. When the first non-flow-restricting tube clamp or the second non-flow-restricting tube clamp is not pressed hard, that is, in the initial state, the first non-flow-restricting tube or the second non-flow-restricting tube is in a closed state to avoid the anticoagulant being used up instantly when not flushing. When the first non-flow-restricting tube or the second non-flow-restricting tube is closed, only the first flow-restricting tube or the second flow-restricting tube works.

[0075] In addition to the application scenarios of the above embodiments, the simultaneous combination of multiple pressure monitoring medical connectors of the utility model can also be applied to other scenarios that require pressure measurement, such as epidural + general anesthesia: continuous epidural pressure measurement + continuous balloon pressure monitoring; general anesthesia + central venous catheterization: continuous balloon pressure monitoring + intermittent or continuous central venous pressure measurement; general anesthesia + central venous catheterization + arterial catheterization: continuous balloon pressure monitoring + central venous pressure monitoring + arterial pressure monitoring; epidural + general anesthesia + central venous catheterization: continuous epidural pressure measurement + continuous balloon pressure monitoring + central venous pressure measurement; epidural catheterization + arterial catheterization: continuous epidural pressure measurement + continuous arterial pressure measurement; epidural catheterization + central venous catheterization: continuous epidural pressure measurement + central venous pressure measurement. Of course, other combinations of pressure measurement can also be performed, which cannot be listed one by one in this application, and those skilled in the art can use them in combination according to different situations.

[0076] The utility model is further described above with the help of specific embodiments, but it should be understood that the specific description here should not be construed as a limitation on the essence and scope of the utility model. Various modifications made to the above embodiments by ordinary technicians in this field after reading this specification are all within the scope of protection of the utility model.

Claims

1. A pressure monitoring medical connector, characterized in that: It comprises a joint main pipe, the front end of which is provided with a first Luer joint, the rear end of which is provided with a first Luer interface, and the first Luer interface is connected with a sealing cap or an anticoagulant flushing component; A first interface communicating with the joint main pipe is provided on the side wall of the joint main pipe, and a pressure monitoring device is connected to the first interface.

2. The pressure monitoring medical connector according to claim 1, characterized in that: The pressure monitoring device includes a cylindrical tube with openings at both ends and a pressure indicating rod that moves up and down in the cylindrical tube. The cylindrical tube is connected to the first interface. The cylindrical tube is a hollow transparent cylindrical tube. The end of the cylindrical tube away from the first interface is sealed and covered with an elastic bellows, and the center of the elastic bellows is provided with the pressure indicating rod; a pressure color display scale is provided on the outer wall of the cylindrical tube along the axial direction.

3. The pressure monitoring medical connector according to claim 1, characterized in that: The pressure monitoring device includes a cylindrical tube with openings at both ends and a pressure indicator that moves up and down in the cylindrical tube. The cylindrical tube is connected to the first interface. The cylindrical tube is a hollow opaque cylindrical tube. One end of the cylindrical tube away from the first interface is connected to the atmosphere. The pressure indicator includes an indicator rod and a piston plate arranged at the lower end of the indicator rod. A spring is sleeved on the indicator rod, one end of the spring is fixed to the piston plate, and the other end is fixed to one end of the cylindrical tube. The outer surface of the indicator rod is coated with different pressure range colors.

4. The pressure monitoring medical connector according to claim 1, characterized in that: The pressure monitoring device includes a piezoelectric sensor box connected to the first interface and a monitor host arranged outside the piezoelectric sensor box. A medical tee is also arranged between the connector main pipe and the first Luer connector. A piezoelectric sensor is attached to the inner wall of the piezoelectric sensor box, and a first transmission line is connected to the piezoelectric sensor; the first transmission line extends to the outside and is electrically connected to the second transmission line on the monitor host.

5. The pressure monitoring medical connector according to claim 4, characterized in that: A connection interface is provided on one end of the first transmission line away from the piezoelectric sensor box, and a connection connector is provided on one end of the second transmission line away from the monitor host, and the connection connector is plugged into the connection interface.

6. The pressure monitoring medical connector according to claim 5, characterized in that: A retractable sterile protective cover is provided on one end of the first transmission line close to the connection interface.

7. The pressure monitoring medical connector according to claim 4, characterized in that: It also includes a mounting frame fixed on the infusion stand through a locking device, and the monitor host is fixedly arranged on the mounting frame.

8. The pressure monitoring medical connector according to any one of claims 1 to 7, characterized in that: The anticoagulation flushing assembly comprises a second Luer connector, a first connecting tube, a second connecting tube and an injection one-way valve which are sequentially connected to the first Luer interface; an axially extending partition is provided in the first connecting tube, and the partition divides the cavity of the first connecting tube into a first cavity and a second cavity which are arranged in parallel; a non-flow-limiting tube is provided in the first cavity, an opening is provided on the side wall of the first cavity, a non-flow-limiting tube clamp is provided next to the opening, and a flow-limiting tube is provided in the second cavity; A plurality of through holes are formed on the side wall of the second connecting tube, and an elastic bag is fixed to the outer periphery of the second connecting tube by an elastic fixing belt, and the elastic bag covers the through holes.

9. The pressure monitoring medical connector according to any one of claims 1 to 7, characterized in that: The anticoagulation flushing assembly comprises a third Luer connector, a third connecting tube and an infusion set connected in sequence to the first Luer interface, the end of the third connecting tube connected to the infusion set has a second Luer interface, and the infusion set is plugged and connected to the second Luer interface; An axially extending partition is provided in the third connecting tube, and the partition divides the cavity of the third connecting tube into a first cavity and a second cavity connected in parallel. A non-flow-limiting tube is provided in the first cavity, an opening is provided on the side wall of the first cavity, and a non-flow-limiting tube clamp is provided next to the opening. A flow-limiting tube is provided in the second cavity.

10. The pressure monitoring medical connector according to any one of claims 1 to 7, characterized in that: The joint main pipe is also provided with a second interface, and the second interface is provided with a pressure assessment cap, which includes a sealing cap body with openings at both ends and a coreless flat film arranged on the surface of the sealing cap body.

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