CN204744830U - Three -way valve - Google Patents

Abstract

The utility model provides a three -way valve, includes: inside has body (15) of an enclosure space, is provided with first port (17), second port (18) and third port (19) on body (15), can warp closedly elastic element (16, 23) of first port (17), this elastic element (16, 23) set up in body (15), in combination department of first port (17) with body (15), and enter gas vent (21), enter gas vent (21) and set up on body (15), through advancing admitting air or exhaust and making elastic element (16, 23) to warp of gas vent (21). The utility model discloses an advantage includes: simple structure can connect tripartite equipment effectively.

Description

a three-way valve

technical field

The utility model relates to a valve, in particular to a three-way valve.

Background technique

There are many clinical patients who partially or completely lose their ability to breathe spontaneously. Medical staff will provide them with non-invasive mechanical ventilation or invasive mechanical ventilation according to the specific situation, so as to help patients maintain breathing cycle, improve oxygenation and restore effective spontaneous breathing. Among them, invasive ventilation refers to mechanical ventilation that needs to establish an artificial airway through oral or nasal tracheal intubation or tracheotomy. After the artificial airway is established in critically ill patients, their own cough reflex is weakened, the function of heating and humidifying the upper respiratory tract is deprived, the self-cleaning effect of cilia is weakened, and the airway secretions increase (see "The impact of standardized airway management on the quality of hospital transport for adult critically ill patients") [J]", Tang Guirong, Jiang Shiyin, Huaxia Medicine, 2011, 24(2): 216-217), timely and effective airway clearance is one of the key factors to ensure effective mechanical ventilation and save critically ill patients.

The main means for medical personnel to clean up patient's respiratory secretions at present is to carry out manual sputum suction operation with sputum suction tube. But this way of cleaning up respiratory secretions has many disadvantages. Too frequent sputum suction can lead to unnecessary tracheal mucosal damage, increase the chance of lung infection, aggravate hypoxemia and acute left heart failure; not timely sputum suction can cause airway obstruction, decreased ventilation, suffocation and even arrhythmia. Studies have shown that suction of sputum may lead to the following complications, such as arrhythmia, airway injury, increased intracranial pressure, abnormal hemodynamics, etc., thereby affecting the recovery of patients.

There is a great need for a fully automatic sputum expectoration machine used in conjunction with a ventilator, a medical device for clearing patient airway secretions, and suitable for patients who use a ventilator to provide invasive mechanical ventilation. The principle of the automatic expectoration machine is to simulate the physiological cough mechanism of normal people. After the ventilator applies an inspiratory flow to the patient, it quickly applies a sudden and short expiratory airflow to the patient, so that the patient's airway The secretions are expelled outwards. When the expectorator is working, it needs to establish a gas channel that is effectively communicated with the ventilator and the patient, and it needs to be able to control the on-off of the gas circuit between the ventilator and the patient, and also be able to monitor the patient's mechanical ventilation, such as the start and end of inhalation. point, start and end point of exhalation, tidal volume, breathing pressure, etc.

The existing breathing circuit can only establish an air connection between the ventilator and the patient, and it is impossible to connect the fully automatic synchronous expectoration machine to it.

Therefore, there is a current need for a connecting piece that connects the ventilator, the patient and the fully automatic synchronous expectoration machine. The ventilator circuit (gas circuit) of the ventilator, the sputum expectoration machine circuit (gas circuit) and the patient circuit (gas circuit) are connected to each other. When the patient is normally mechanically ventilated, the ventilator circuit of the ventilator is connected to the patient's airway, and the circuit of the sputum expectorator is closed. When the patient needs to cough up sputum, the ventilator circuit of the ventilator is closed, and the sputum expectoration machine circuit of the sputum expectorator is connected to the patient's circuit.

Therefore, how to design and manufacture connectors that meet the above requirements is an urgent problem to be solved in the prior art.

Utility model content

In order to solve the practical needs described in the background technology, the utility model provides a three-way valve, which includes: a body with a closed space inside, and a first port, a second port and a third port are arranged on the body; it can be deformed and closed The elastic element of the first port, the elastic element is arranged in the body, at the junction of the first port and the body; Exhaust air can deform the elastic element.

Further, the body includes a first body component, a second body component and a third body component, the three are combined to form the body, the first port and the second port are located on the first body component, and the third port is located on the second body component, further The vent is located on the third body member.

Further, the first port is the port of the ventilator connected with the circuit of the ventilator, the second port is the port of the expectorant machine connected with the circuit of the expectorant machine, and the third port is the port of the patient communicated with the airway of the patient.

Further, the elastic element is a balloon or a diaphragm.

Further, the body also includes reinforcing ribs for blocking the bottom of the expanded balloon, and the reinforcing ribs are arranged in the body at the interface between the ventilator port and the body.

Further, the body also includes a blocking step for blocking liquid flowing into the body, and the blocking step is arranged inside the body, between the ventilator port and the connection port of the body, and between the port of the expectorant machine and the connection port of the body.

Further, the second body member has an opening, and the elastic element is aligned with the opening.

Further, the third body component has a cover, the cover has a hole communicating with the intake and exhaust ports, and the cover covers the opening on the second body component.

Further, the port of the ventilator and the port of the expectorant machine are obliquely connected with the main body in opposite directions.

Further, the patient port is provided with a patient airway pressure detection port for detecting the patient's airway pressure.

Compared with the prior art, the utility model has the advantages of simple structure, convenient use, and can effectively connect three equipment pipelines together, and at the same time, it can connect two equipments and close the pipelines of the third party.

Description of drawings

Fig. 1 is a perspective view of the first embodiment of the three-way valve of the present invention.

Fig. 2 is a cross-sectional view of the three-way valve shown in Fig. 1 in a first state.

Fig. 3 is a cross-sectional view of the three-way valve shown in Fig. 1 in a second state.

Fig. 4 is an exploded view of the second embodiment of the three-way valve of the present invention.

Fig. 5 is a sectional view of the three-way valve shown in Fig. 4 .

Fig. 6 is a cross-sectional view of a third embodiment of the three-way valve of the present invention.

Fig. 7 is an axonometric sectional view of the elastic element in Fig. 6 .

reference sign

15 body 15A first body member

15B second body member 15C third body member

16 Balloons 17 Ventilator Ports

17A ribs 17B barrier steps

18 expectoration machine port 19 patient port

21 Inlet and exhaust port 22 Patient airway pressure detection port

Detailed ways

Embodiments of the present utility model are described below with reference to the accompanying drawings, wherein the same components are denoted by the same reference numerals.

first embodiment

Fig. 1 is a perspective view of the first embodiment of the three-way valve of the present invention, which uses a balloon as the elastic element. Fig. 2 is a cross-sectional view of the three-way valve shown in Fig. 1 in a first state. Fig. 3 is a cross-sectional view of the three-way valve shown in Fig. 1 in a second state.

The three-way valve includes a body 15, and the body 15 has a closed space inside. The main body 15 is provided with intake and exhaust ports 21, and the main body 15 is also provided with three airway ports: the first port (ventilator port) 17, the second port (expectation machine port) 18 and the third port (patient port) 19, so that three gas circuits can be connected: ventilator gas circuit, expectorant machine gas circuit and patient gas circuit. Specifically, the ventilator port 17 is connected to the ventilator through a ventilator circuit (not shown), forming a ventilator air circuit. The expectoration machine port 18 is connected to the expectoration machine through a pipeline (not shown) of the expectoration machine to form an air circuit of the expectoration machine. The patient port 19 is connected to the patient's airway through a patient pipeline (not shown) to form a patient's airway, thereby establishing an airway connection between the patient, the ventilator, and the expectorant machine. Ventilator port 17, sputum machine port 18, and patient port 19 are internal or external conical joints that meet industry standards ("YY1040.1-2003 Conical joints for anesthesia and respiratory equipment Part 1: Conical head and sleeve") , can be 15mm size, also can be 22mm size.

The main body 15 is a hollow structure, and inside the main body 15, at the junction of the main body 15 and the ventilator port 17, an elastic element 16 is arranged, and the elastic element 16 can close the first port (17) after being deformed. Among the figure, elastic element 16 is shown as balloon 16 (see Fig. 2), and the utility model is described below with balloon 16 as example, but the protection scope of the utility model is not limited thereto, and the parts with the same working principle can be applied in In the utility model, it is included in the utility model.

Balloon 16 is capable of being inflated and deflated. Inflation and exhaust of the balloon 16 are realized through the inlet and outlet ports 21 . The intake and exhaust ports 21 are connected to the balloon 16 . The balloon 16 can seal off the ventilator port 17 after inflation, so that the ventilator circuit is closed. When air is required, the sputum expectoration machine inflates the balloon 16 through the intake and exhaust ports 21 , so that the balloon 16 expands and closes the ventilator port 17 . When exhaust is required, the expectorant machine opens the intake and exhaust ports 21, and the balloon 16 is deflated, so that the balloon 16 shrinks to a natural state and opens the port 17 of the ventilator. Generally speaking, when the ventilator works normally, the balloon 16 is in a natural state, that is, uninflated, and the gas provided by the ventilator is delivered to the patient through the ventilator port 17 and the patient port 19 . When the sputum expectoration machine exerts an action of expectoration on the patient, the sputum expectoration machine inflates the balloon 16 , and the balloon 16 expands and closes the ventilator port 17 .

FIG. 2 shows a cross-sectional view of the three-way valve in an open state. At this time, the ventilator port 17 is open, and the airflow provided by the ventilator can be delivered to the patient through the ventilator port and through the three-way valve. FIG. 3 shows a cross-sectional view of the three-way valve in a closed state. At this time, the ventilator port 17 is closed by the inflated balloon 16, and the patient can expectorate. Optionally, the balloon 16 can be replaced by other switches or valves, as long as they can controlly open or block the ventilator port 17 .

Further, the patient port 19 is provided with a patient airway pressure detection port 22 . The measurement and control pipeline (not shown) transmits the pressure signal collected from the patient’s airway pressure detection port 22 on the three-way valve and the ventilator port 17 to the expectoration machine, and at the same time transmits the pneumatic control signal given by the expectoration machine Give the balloon 16. The measurement and control pipeline is a series of pipes, and more or less series of pipes can be set according to actual needs. Detecting the patient's airway pressure is to provide a basis for the sputum expectoration machine to judge the patient's breathing situation, such as judging the patient's respiratory rate, breathing start and stop time, respiratory peak pressure and other information. Provide continuous and effective mechanical ventilation for the patient. When the patient is in danger of suffocation, that is, when the patient's airway pressure is maintained in a certain value range (such as 15 to 30cmH ₂ O) for a certain period of time (such as 10 seconds), the expectoration machine can issue an alarm .

When in use, the three-way valve should be kept in the vertical state shown in Figure 1, so as to prevent sputum and other secretions from contaminating the balloon 16, and also prevent sputum and other secretions from polluting and blocking the patient's airway pressure detection port 22. or balloon 16 .

second embodiment

Fig. 4 is an exploded view of the second embodiment of the three-way valve of the present invention. Fig. 5 is a sectional view of the three-way valve shown in Fig. 4 .

The main body 15 includes a first main body component 15A, a second main body component 15B and a third main body component 15C, and the three are snapped together to form the main body 15 . The main body 15 is designed to be detachable in order to facilitate the replacement of the relatively easy-to-wear balloon 16 . The ventilator port 17 and the sputum expectoration port 18 are provided on the first body member 15A. A patient port 19 is provided on the second body member 15B. There is an opening on the second body member 15B, and the opening is aligned with the opening of the balloon 16 and has the same size. The third body member 15C is provided with intake and exhaust ports 21 . Generally speaking, the inlet and outlet ports 21 are relatively small, and the opening of the balloon 16 is relatively large, so the third body member 15C has a cover, which can cover the second body member 15B and align with the opening of the balloon 16. The opening, and the cover has a small hole, the small hole communicates with the intake and exhaust port 21.

The balloon 16 is placed close to the interface between the port 17 of the ventilator and the main body 15, and together with the main body forms a separate enclosed space. Preferably, ribs 17A are placed at the interface. When the balloon is inflated, the bottom of the balloon may be deformed. The ribs 17A can block the balloon 16 to prevent excessive deformation of the bottom of the balloon 16 .

In the first embodiment, the preferred use position of the three-way valve is vertical. In the second embodiment, the state of use of the three-way valve can be placed horizontally (as shown in Figure 4). The liquid affects the three-way valve, in particular the balloon 16 . A blocking step 17B may be provided inside the housing of the three-way balloon valve. The blocking step 17B is disposed inside the main body 15 , between the connection port between the ventilator port 17 and the main body 15 , and the connection port between the expectoration machine port 18 and the main body 15 . The blocking step 17B has a certain height to block the condensed water, sputum and the like. The barrier step 17B cannot separate the main body 15 into two airtight spaces, because the main body 15 is a three-way tube, which requires ventilator port 17 , expectorant port 18 and patient port 19 to ventilate. The blocking step 17B is provided on the first body member 15A and the second body member 15B as shown in FIG. 4 .

In this embodiment, the ventilator port, expectoration machine port, and patient port are internal conical joints or external conical joints that comply with industry standards ("YY1040.1-2003 Anesthesia and Respiratory Equipment Conical Joints Part 1: Conical Head and Taper Sleeve"). Conical joints, the ventilator port and patient port are 15mm internal conical joints, and the expectorator port is 15mm external conical joints.

The ventilator port 17 and the sputum expectorator port 18 are obliquely connected to the main body 15 in opposite directions, in order to reserve a space for connecting with the ventilator circuit (not shown) and the expectorator circuit (not shown).

third embodiment

5 to 6 show the third embodiment of the present invention, the third embodiment is based on the first embodiment, the balloon 16 is replaced by a sheet membrane 23 . At the same time, the structure of the third body member 15C is changed so that it is suitable for fixing the sheet diaphragm 23 and can form a separate closed space with it. Like the balloon, the sheet diaphragm 23 can be driven and deformed by compressed gas to close the port 17 of the ventilator. FIG. 6 shows an axonometric sectional view of a sheet membrane 23 . FIG. 7 shows a cross-sectional view of a third embodiment of the three-way valve of the present invention using the sheet-type diaphragm shown in FIG. 6 as the elastic element.

Compared with the balloon 16, the sheet diaphragm 23 has the characteristics of faster response speed and better sealing effect, but the balloon 16 has higher reliability.

The three-way valve of the utility model can be used not only for the gas circuit, but also for the liquid.

The above-mentioned embodiments are only preferred specific implementations of the utility model, and the usual changes and replacements performed by those skilled in the art within the scope of the technical solution of the utility model shall be included in the protection scope of the utility model.

Claims (10)

1. a three-way valve, is characterized in that, comprising:

Inside has the body (15) of an enclosed space, body (15) is provided with the first port (17), the second port (18) and the 3rd port (19);

The flexible member (16 of closed described first port (17) can be out of shape, 23), this flexible member (16,23) is arranged in body (15), in the junction of the first port (17) with body (15); And

Porting (21), porting (21) is arranged on body (15), flexible member (16,23) can be made to be out of shape by the air inlet of porting (21) or aerofluxus.

2. three-way valve according to claim 1, it is characterized in that, body (15) comprises the first noumenon component (15A), the second body member (15B) and the 3rd body member (15C), and three combines and forms body (15)

First port (17) and the second port (18) are positioned on the first noumenon component (15A), 3rd port (19) is positioned on the second body member (15B), and porting (21) is positioned on the 3rd body member (15C).

3. three-way valve according to claim 1, it is characterized in that, first port (17) is the respirator port be communicated with breathing circuit, second port (18) is the expectoration machine port with expectoration machine pipeline connection, and the 3rd port (19) is as the patient ports be communicated with patient airway.

4. three-way valve according to claim 1, is characterized in that, described flexible member (16,23) is sacculus (16) or diaphragm (23).

5. three-way valve according to claim 4, it is characterized in that, described body (15) also comprises the flexible member (16 for stopping expansion, 23) reinforcement (17A) of bottom, reinforcement (17A) is arranged in body (15), is positioned at the seam of respirator port (17) and body (15).

6. three-way valve according to claim 1, it is characterized in that, described body (15) also comprises the obstruct step (17B) for stopping the liquid flowed in body (15), intercepting step (17B), to be arranged on body (15) inner, at the connector of respirator port (17) and body (15), between expectoration machine port (18) and the connector of body (15).

7. three-way valve according to claim 2, is characterized in that, the second body member (15B) has perforate, flexible member (16,23) and described apertures in alignment.

8. three-way valve according to claim 7, it is characterized in that, described 3rd body member (15C) has lid, and described lid has the hole communicated with porting (21), and described lid hides the described perforate of the second body member (15B).

9. three-way valve according to claim 1, is characterized in that, respirator port (17) is connected with body (15) in opposite direction obliquely with expectoration machine port (18).

10. three-way valve according to claim 1, is characterized in that, patient ports (19) is provided with the patient airway pressure detecting mouth (22) for detecting patient airway pressure.