WO2018107567A1 - Pressure indicator - Google Patents

Abstract

A pressure indicator, the structure thereof consisting of a housing (A) formed by a connected upper cover (13) and lower cover (12), an intermediate assembly (B) inside the housing (A) formed by a sealing cover (4), a flexible pressure-sensitive diaphragm (6), a support ring (5) and an indicator rod (8), and a feedback assembly (C) formed by a return tube (1) and a connector (7) formed from two hollow cone-shaped cavities; the top cover (13) has provided thereon a ventilation chamber (3), an air inlet (14) and a check valve (2), the support ring (5) is suspended from an inner circumferential wall of the sealing cover (4), an outer wall of the lower cover (12) is provided with a pressure indicating area (11), a lower end of the lower cover (12) is provided with a round groove (12-2), an interface (9) is provided at the center of the round groove (12-2), a sealing sleeve (10) is connected on the round groove (12-2), the connector (7) has provided thereon a ventilation chamber (7-3), one end of the return tube (1) is connected to the ventilation chamber (3) located at the upper cover (13), and another end thereof is connected to the ventilation chamber (7-3) on the connector (7). The present pressure indicator has a simple overall structural model, is convenient to use, and has low production costs; the present pressure indicator may be used for pressure detection and feedback adjustment in airbags for endotracheal intubation, tracheostomy intubation and laryngeal masks.

Description

Pressure indicator Technical field

The invention relates to a pressure indicator, which can be used together with a medical device such as an endotracheal tube with a balloon, a tracheotomy cannula, a laryngeal mask, etc., to implement monitoring and feedback to adjust the pressure of the balloon, and belongs to the technical field of medical instruments.

Background technique

In the medical field, medical devices such as a laryngeal mask, an endotracheal tube, and a tracheotomy tube are often used to establish an artificial airway for the patient in emergency work and respiratory management to assist in breathing. Generally, the structure of a medical device such as a laryngeal mask, an endotracheal tube, a tracheotomy tube, and the like includes an air bag, and a check valve is connected to the air bag. When used, the check valve is filled with gas, and the air bag is filled to achieve a sealed air tube. The purpose is to optimize the patient's oxygen delivery. To ensure the effectiveness of artificial airway management and the safety of patient use, balloon pressure is very important in endotracheal intubation care. Specifically, the airbag pressure is an important factor in determining whether the airbag damages the tracheal mucosa. Insufficient airbag inflation or air leakage cannot achieve effective ventilation. Excessive inflation and excessive pressure may cause ischemia or even necrosis of the tracheal wall. important. There is a need in the clinic for a pressure indicator to indicate and adjust balloon pressure. In the prior art, there are many methods for measuring the pressure of the airbag: generally, the hand-pinch airbag sensation method, the quantitative inflation method, and the airbag pressure gauge measurement method are used clinically.

Hand gripping the airbag sensation method is simple and convenient, mainly based on the clinical experience of the medical staff. The judgment of this method is highly different and it is impossible to accurately determine the balloon pressure.

Airbag inflation method, airbag inflation is generally 5-10ml, this method is different due to different patient models and tracheal intubation models, the airbag inflation amount is not the same, and can not accurately determine the balloon pressure.

The airbag pressure gauge measurement method can accurately and scientifically judge the pressure of the airbag, inflate the airbag, deflate and accurately read the value.

How to design an economical, safe and reliable pressure indicator that can accurately indicate the pressure of the airbag becomes a problem that is of great concern to the emergency room, the rescue room, and the ICU medical workers and nursing staff. It is also an urgent need for development and research in the medical device industry. Question.

In recent years, engineers and technicians in the medical device industry have done a lot of research and development work on a clinical pressure indicator, and have been disclosed by the following patent documents:

China Invention Patent Specification Authorization Bulletin No. CN204479237U (authorization announcement date July 15, 2015) "pressure indicator for adjustable balloon pressure", discloses that its structure includes a casing formed by an upper cover and a lower cover, in the casing A cylindrical intermediate member is disposed, the lower port of the intermediate member is covered with an elastic pressure sensing diaphragm, an intermediate member inner cavity is formed inside the intermediate member, and a housing inner cavity is formed between the housing and the intermediate member. A balloon filling and discharging unit composed of a balloon filling and discharging trachea, a joint, and a fixing device and a pressure feedback unit composed of a communicating tube and a pressure feedback tube are connected.

The advantages of this invention are:

1) With a pressure feedback unit, the effect of adjusting the pressure of the balloon can be achieved, and the problem of increasing the gap between the balloon and the tracheal wall of the medical device such as the endotracheal intubation and the wall of the trachea is solved, and the oxygen supply is ensured. effect;

2) The pressure indication is accurate.

But its shortcomings are:

1) The structure is complicated, the operation steps are many, and the use is inconvenient. The joint and the fixing device are connected with the one-way valve of the medical device such as the tracheal intubation, and the joint needs to be connected with the one-way valve, and then the folding wing is folded and the lug structure is locked to fix the joint on the balloon inflation tube. In order to prevent the end of the tracheal intubation check valve from falling off. The structure is complicated, the operation steps are many, and the use is inconvenient.

2) The parts are mostly tightly connected, the connection is not secure, the sealing is not ideal, and air leakage may occur during use.

3) The air inlet and check valve structure are arranged on the same side as the pressure indication zone, so that the length of the pressure indication zone is relatively small, which is not conducive to observation.

Summary of the invention

The object of the present invention is to provide a pressure indicator capable of communicating with a medical device such as an endotracheal tube with a balloon, a tracheotomy tube, a laryngeal mask, etc., in view of the deficiencies of the prior art. In combination with it, it is simple and convenient to connect with the check valve of medical instruments such as endotracheal intubation, which simplifies the operation steps in use, ensures the firmness and sealing of the connection, and implements monitoring and feedback to adjust the airbag pressure. Moreover, on the basis of not increasing the length of the pressure indicator, the indication area is enlarged, which is more convenient for observation, thereby solving the problems existing in the prior art.

The technical solution adopted by the present invention to achieve the above object is:

A pressure indicator comprising a housing consisting of an upper cover and a lower cover, an intermediate assembly comprising an elastic pressure sensing diaphragm and an indicator rod, and a feedback assembly, characterized by: a housing, an intermediate assembly and a feedback assembly, The housing, intermediate components and feedback components, their respective structures are as follows:

a housing consisting of an upper cover and a lower cover;

The intermediate assembly is composed of a sealing cover disposed inside the casing, an elastic pressure sensing diaphragm, a support ring and an indicator rod;

The feedback component consists of a loop line and a joint.

The upper cover is respectively provided with an air inlet and a ventilation chamber 3 at an arbitrary position thereof, and the upper cover is integrally formed with the air inlet and the ventilation chamber, and the inner side of the upper cover is provided with a convex portion provided with a groove structure a table is provided with a groove at the edge of the upper cover.

The air inlet has a design size matching the size of the Luer interface, and a check valve is disposed on the inner side thereof.

The sealing cover is fixedly connected between the protrusion provided on the upper portion thereof and the groove on the inner side of the upper cover, and the protrusion is provided with a circular hole in the middle of the protrusion, and the sealing cover is A support ring is embedded in the peripheral wall, and a lower portion of the sealing cover is fixedly connected to the elastic pressure sensing diaphragm to which the indicator rod is attached.

The lower cover is provided with a convex groove which can be fixedly connected with the upper cover groove, a pressure indicating area is arranged outside the lower cover, a circular groove is arranged at the lower end of the lower cover, and an interface is arranged at the center of the circular groove. The interface is a luer interface, which can be connected to a one-way valve such as an endotracheal tube medical device, and a sealing sleeve is connected to the circular groove, and a gap is formed between the sealing sleeve and the interface, and the sealing sleeve is Polyvinyl chloride or silica gel flexible polymer material is made of one material.

The joint is composed of two hollow conical cavities, and the design size is matched with the standard joint of the anesthesia and respiratory equipment. The joint is provided with a ventilation chamber, and the ventilation chamber can be axially parallel or axially formed with the joint. angle.

The loop line has one end connected to the venting chamber located in the upper cover and the other end communicating with the venting chamber on the joint.

The circuit pipeline is made of a flexible polymer material, and the diameter of the pipe of the circuit is 1 mm to 4 mm, and the hardness of the pipe body is 60 to 90 HA.

Advantages and Benefits of the Invention

Compared with the prior art, the present invention has the following advantages and benefits:

Advantages: The overall structure is simple in shape, convenient to use, small in size, and low in manufacturing cost.

Beneficial effects:

1) The lower cover is provided with a Luer interface and a sealing sleeve, which can be coupled with the one-way valve of the tracheal intubation balloon, and the check valve is directly inserted between the Luer interface and the sealing sleeve during use, and the connection mode is operated. It is simple and ensures the tightness and tightness of the connection, ensuring that the pressure indicator is not leaking during use.

2) Set the air inlet and the check valve on the cover of the housing, and set the pressure indication area on the lower cover of the housing. The structural design makes the air inlet, the one-way valve and the pressure indication zone respectively disposed at both ends of the casing, and the manufacturing process is simple. Moreover, the defects in the prior art that the inlet port check valve and the pressure indicating zone are both disposed on the lower cover of the casing are small (15 mm to 20 mm), and the invention is capable of not observing. Under the premise of the overall length of the pressure indicator, the length of the pressure indication zone is increased to 20 mm to 30 mm, which makes it easier to observe the pressure range during use.

3) The size and size of the joints are designed to match the standard joints of anesthesia and respiratory equipment, so that they can be connected to medical equipment such as ventilators, and the connection is convenient and firm.

4) Bonding or welding can be used between the upper cover and the lower cover, between the upper cover and the sealing cover, between the circuit pipe and the joint, between the circuit pipe and the upper cover, and between the sealing sleeve and the lower cover. The connection method ensures the tightness and tightness of the connection, and ensures that the pressure indicator does not leak when in use.

DRAWINGS

Figure 1 is a cross-sectional view showing the structure of a pressure indicator of the present invention;

Figure 2 is a perspective view of the upper cover of Figure 1;

Figure 3 is a perspective view of the sealing cover of Figure 1;

Figure 4 is a cross-sectional view of the lower cover of Figure 1.

Figure 1: 1 loop line; 2 check valve; 3 venting chamber; 4 sealing cover; 5 support ring; 6 elastic pressure sensing diaphragm; 7 joint; 7-1 conical cavity; 7-2 conical cavity Body; 7-3 ventilation chamber; 8 indicator rod; 9 interface; 10 sealing sleeve; 11 pressure indicating area; 12 lower cover; 13 upper cover;

In Figure 2: 13-1 groove; 13-2 groove; 13-3 boss.

In Figure 3: 4-1 protrusions; 4-2 round holes.

In Figure 4: 12-1 convex groove; 12-2 circular groove.

detailed description

In order to make the objects, features and advantages of the present invention more comprehensible, the present invention will be described below with reference to the accompanying drawings. The specific embodiments of the present invention will be described in detail.

Example

A pressure indicator having a structure as shown in FIG. 1 is composed of a housing A, an intermediate assembly B and a feedback assembly C. The housing A, the intermediate assembly B and the feedback assembly C are respectively configured as follows:

The casing A is composed of an upper cover 13 and a lower cover 12;

The intermediate assembly B is composed of a sealing cover 4 disposed inside the casing A, an elastic pressure sensing diaphragm 6, a support ring 5 and an indicating rod 8;

The feedback component C consists of a loop line 1 and a joint 7.

The upper cover 13 is provided at each of its positions with an air inlet 14 and a venting chamber 3, and the upper cover 13 is integrally formed with the air inlet 14 and the venting chamber 3, as shown in FIG. The inside of the cover 13 is provided with a boss 13-3 having a structure of a groove 13-2, and a groove 13-1 is provided at the edge of the upper cover 13.

The air inlet 14 is designed to match the size of the Luer interface, and a check valve 2 is disposed on the inner side thereof.

The sealing cover 4 is connected and fixed by a protrusion 4-1 disposed on the upper portion thereof and a groove 13-2 as shown in FIG. 2 on the inner side of the upper cover 13. In the manner of tight fitting, bonding, etc., the present invention is designed as a bonding and fixing manner, and a circular hole 4 as shown in FIG. 3 which can communicate with the venting cavity 3 of the upper cover 13 is disposed in the middle of the protrusion 4-1. -2, the inner peripheral wall of the sealing cover 4 is fitted with a support ring 5, and the lower portion of the sealing cover 4 is connected and fixed to the elastic pressure sensing diaphragm 6 to which the indicator rod 8 is attached.

The lower cover 12 is provided with a convex groove 12-1 as shown in FIG. 4, which can be connected and fixed to the upper cover groove 13-1. The connection and fixing manner can be welding, bonding and tight fitting. The invention is designed to be a welded connection fixing method, and a pressure indicating area 11 is arranged outside the lower cover 12, and a lower end end of the lower cover 12 is provided with A circular groove 12-2 shown in Fig. 4 is provided at the center of the circular groove 12-2 with an interface 9, which is a luer interface, which can be used with a check valve such as an endotracheal tube medical device. The connection is made, and the sealing sleeve 10 is connected to the circular groove 12-2, and a gap is formed between the sealing sleeve 10 and the interface 9.

The sealing sleeve 10 is made of one of polyvinyl chloride and silica gel flexible polymer materials. The sealing sleeve material of the present invention is designed as polyvinyl chloride. Since the sealing sleeve 10 has a certain flexibility, when used, it is allowed. The tracheal intubation check valve can also ensure the connection firmness and sealing performance. The sealing sleeve 10 can be formed into a hollow cylindrical shape, a hollow conical shape and the like, and the shape is not limited thereto, as long as it can be intubated with the trachea. The check valve is connected and can be fixed and sealed after connection.

The joint 7, as shown in Figure 1, consists of two hollow conical cavities 7-1 and 7-2, the design dimensions of which match the standard joints of the anesthesia and breathing apparatus, and the joint 7 is provided with a venting chamber 7-3, the venting chamber 7-3 may be axially parallel to the joint 7 or may form an angle with the axial direction. The present invention is designed such that the venting chamber is axially parallel to the joint.

The circuit line 1, as shown in Fig. 1, has one end communicating with the venting chamber 3 of the upper cover 13, and the other end communicating with the venting chamber 7-3 of the joint 7.

The circuit pipeline 1 is made of a flexible polymer material, and the loop pipeline material of the present invention is designed as a polyvinyl chloride medical polymer material, and the diameter of the loop pipeline 1 is 1 mm to 4 mm, and the diameter of the tube of the present invention The design is 3mm, the hardness of the pipe body is 60-90HA, and the hardness of the pipe body of the present invention is 80HA.

In the present invention, the above-mentioned welding or bonding fixing method is adopted to make the connection between the components more firm and airtight, thereby ensuring that the pressure indicator does not leak during use, and can accurately and stably indicate the pressure.

In the present invention, the pressure indicating zone 11 can increase the length of the pressure indicating zone to 20 mm to 30 mm without increasing the overall length of the pressure indicator, thereby facilitating the use of the pressure range. Observation.

Specific applications, to detect the pressure of the tracheal intubation balloon as an example.

When the pressure indicator of the present invention is used, the endotracheal tube check valve is connected between the interface 9 of the lower cover 12 and the sealing sleeve 10, thereby connecting the inside of the housing A with the endotracheal tube airbag into a cavity. This type of connection is a direct insertion method, and the operation is simple and convenient. The structure of the sealing sleeve 10 can firmly connect the interface 9 of the lower cover 12 and the one-way valve of the tracheal intubation, and is not easy to fall off, and has good sealing performance and no air leakage, thereby ensuring the use effect.

The syringe is connected to the air inlet 14 of the pressure indicator upper cover 13, and the pressure indicator is filled with gas by a syringe. The gas passes through the air inlet 14, passes through the pressure indicator inside, and the interface 9 of the lower cover 12 enters the air tube insertion. The check valve and the air bag are used to inflate the air bag intubation air bag.

One end of the joint 7 is connected to an oxygen supply device such as a ventilator, and the other end of the joint is connected with the air source connector of the tracheal intubation, so that the human lung cavity, the oxygen supply device and the circuit line 1 are connected into a cavity, when the patient inhales and When exhaling, the human lung cavity expands and contracts instantaneously, and the pressure of the tracheal intubation balloon decreases or increases. At this time, the gas in the intermediate component of the pressure indicator and the gas in the tracheal intubation balloon will compensate each other. Thereby, the feedback adjusts the pressure of the tracheal intubation balloon during the oxygen supply process.

The pressure indicator of the invention has simple overall structure, small size, convenient use, convenient manufacture and low cost, and can be used together with a medical device such as an endotracheal tube with a balloon, a tracheal intubation tube, a laryngeal mask, etc., to implement monitoring, The feedback adjusts its balloon pressure.

The specific details are set forth above in order to provide a thorough understanding of the present invention, but are not intended to limit the structure of the invention. Any simple modifications, equivalent changes and modifications of the above-described embodiments in accordance with the technical scope of the present invention are still within the scope of the technical solutions of the present invention as long as they do not depart from the scope of the claims.

Claims (8)

A pressure indicator comprising a housing consisting of an upper cover and a lower cover, an intermediate assembly comprising an elastic pressure sensing diaphragm and an indicator rod, and a feedback assembly, characterized by: a housing (A), an intermediate assembly (B), and The feedback component (C) is composed of the housing (A), the intermediate component (B) and the feedback component (C), and their respective structures are as follows: The casing (A) is composed of an upper cover (13) and a lower cover (12); The intermediate assembly (B) is composed of a sealing cover (4) disposed inside the casing (A), an elastic pressure sensing diaphragm (6), a support ring (5) and an indicator rod (8); The feedback component (C) consists of a loop line (1) and a joint (7). The pressure indicator according to claim 1, characterized in that: the upper cover (13) is provided at each of its positions with an air inlet (14) and a ventilation chamber (3), the upper cover (13) ) integrally formed with the air inlet (14) and the venting chamber (3), and the inner side of the upper cover (13) is provided with a boss (13-3) having a structure of a groove (13-2), the upper cover (13) A groove (13-1) is provided at the edge. The pressure indicator according to claim 1, characterized in that the air inlet (14) is designed to match the size of the Luer interface, and a check valve (2) is disposed on the inner side thereof. A pressure indicator according to claim 1, wherein said sealing cover (4) passes through a projection (4-1) provided at an upper portion thereof and a recess (13-2) inside the upper cover (13) The connection between the protrusions (4-1) is provided with a circular hole (4-2) which can communicate with the ventilation chamber (3) of the upper cover (13), and the inner circumference wall of the sealing cover (4) A support ring (5) is embedded, and a lower portion of the seal cover (4) is fixedly coupled to the elastic pressure sensing diaphragm (6) to which the indicator rod (8) is attached. The pressure indicator according to claim 1, characterized in that: the lower cover (12) is provided at its edge with a convex groove (12-1) which can be fixedly connected with the upper cover groove (13-1), Outside the cover (12) A pressure indicating zone (11) is provided, and a lower circular groove (12-2) is disposed at a lower end of the lower cover (12), and an interface (9) is disposed at a center of the circular groove (12-2), the interface (9) a luer interface that can be coupled to a one-way valve, such as an endotracheal tube medical device, to which a sealing sleeve (10), a sealing sleeve (10) and an interface (9) are attached A gap is formed between the seal sleeves (10) made of one of polyvinyl chloride and silicone flexible polymer materials. A pressure indicator according to claim 1, characterized in that said joint (7) consists of two hollow conical cavities (7-1) and (7-2), designed in size and anesthesia and breathing The standard joint of the device is matched, and the joint (7) is provided with a venting chamber (7-3), and the venting chamber (7-3) can be axially parallel to the joint (7) or at an angle to the axial direction. A pressure indicator according to claim 1, characterized in that said circuit line (1) has one end connected to the venting chamber (3) of the upper cover (13) and the other end to the joint (7) The venting chamber (7-3) is in communication. The pressure indicator according to claim 1, characterized in that: the circuit line (1) is made of a flexible polymer material, and the diameter of the circuit of the circuit (1) is 1 mm to 4 mm. The hardness is 60 to 90 HA.

Images