Provided is a new ventilator that can be used for pulmonary resuscitation without requiring an electrical driving source. A ventilator includes a housing. The housing has an input port through which a gas is introduced into the housing, a main port through which the gas that is to be sent to and inhaled by a patient and a gas that is exhaled by the patient pass, an exhaust port through which the gas inhaled or the gas exhaled is exhausted from the housing, a ventilation path connecting the input port and the main port to each other, and a relief valve that is opened by receiving a pressure from the ventilation path and that allows communication between the ventilation path and the exhaust port so as to release the pressure.
1 . A ventilator comprising:
a housing,
wherein the housing has
an outer peripheral wall,
a lid, the lid and the outer peripheral wall cooperatively defining the housing,
an input port, formed on the outer peripheral wall, through which a gas is introduced into the housing,
a main port, formed on a bottom surface of the housing, through which the gas that is to be sent to and inhaled by a patient and a gas that is exhaled by the patient pass,
an exhaust port, formed on the outer peripheral wall, through which the gas to be inhaled or the gas exhaled is exhausted from the housing,
a heat and moisture exchanger filter disposed inside the housing and between the main port and the exhaust port,
a ventilation path connecting the input port and the main port to each other, and
a relief valve, formed inside the housing, that includes a valve body configured to be opened by receiving a pressure from the ventilation path and that allows communication between the ventilation path and the exhaust port in such a manner as to release the pressure.
2 . The ventilator according to claim 1 ,
wherein the input port, the exhaust port, the ventilation path, and the relief valve are arranged inside the housing.
3 . The ventilator according to claim 1 ,
wherein the housing further includes a spontaneous-breathing valve that is opened by an inspiratory pressure at which the patient spontaneously breathes in such a manner as to allow communication between the ventilation path and an area outside the housing.
4 . The ventilator according to claim 3 ,
wherein the spontaneous-breathing valve has a spontaneous-breathing opening formed in the housing and a valve film closing the spontaneous-breathing opening, the valve film being configured to be opened toward the inside of the housing by an inspiratory pressure at which a patient spontaneously breathes.
5 . The ventilator according to claim 1 ,
wherein the housing has a shape of a box-shaped polyhedron.
6 . The ventilator according to claim 1 ,
wherein the housing is a resin-molded body.
7 . The ventilator according to claim 1 ,
wherein the input port is disposed inside the housing and includes a first connection pipe having an introduction port that is open toward an outside of the housing.
8 . The ventilator according to claim 1 ,
wherein the exhaust port is disposed inside the housing and includes a second connection pipe having an outlet that is open toward an outside of the housing.
9 . The ventilator according to claim 8 ,
wherein the outlet has a curved recess that is recessed toward the inside of the housing from the outer peripheral wall.
10 . The ventilator according to claim 8 ,
wherein a ventilation groove is formed in an outer surface of the housing, the outer surface having the exhaust port, in such a manner as to communicate with the outlet and to extend to an outer edge of the outer surface.
11 . The ventilator according to claim 1 ,
wherein the relief valve further includes
a pressure setting dial that has a disc-like shape and that is configured to be rotated to enable setting of the pressure at which the valve body is opened and
a dial cover holding the pressure setting dial such that the pressure setting dial is rotatable.
12 . The ventilator according to claim 1 ,
wherein the relief valve further includes a valve shaft that is integrally formed with the valve body and that supports movement of the valve body, and
wherein the housing includes a bearing portion that guides movement of the valve shaft.
13 . The ventilator according to claim 1 , wherein the input port has a shape protruding from the housing.
14 . The ventilator according to claim 13 , wherein the main port is formed as a cylindrical pipe protruding outward from a bottom surface of the lid.
15 . The ventilator according to claim 1 , wherein the exhaust port has a shape protruding from the housing.
16 . The ventilator according to claim 1 , wherein
the lid has an outer peripheral wall and a bottom-surface portion, and
the heat and moisture exchanger filter is disposed in a space formed and defined by the outer peripheral wall and the bottom-surface portion.
17 . The ventilator according to claim 1 , wherein the input port is recessed towards the inside of the housing from the outer peripheral wall.
18 . A ventilator unit comprising:
the ventilator according to claim 1 ; and
a patient-side breathing member one end of which is connected to the main port of the ventilator and another end of which is connected to a patient.
19 . A manual pulmonary resuscitator comprising:
the ventilator according to claim 1 .
20 . An inhalation anesthesia apparatus comprising:
the ventilator according to claim 1 .
21 . A ventilator comprising:
a housing,
wherein the housing has
an input port through which a gas is introduced into the housing,
a main port through which the gas that is to be sent to and inhaled by a patient and a gas that is exhaled by the patient pass,
an exhaust port through which the gas inhaled or the gas exhaled is exhausted from the housing,
a ventilation path connecting the input port and the main port to each other, and
a relief valve that includes a valve body configured to be opened by receiving a pressure from the ventilation path and that allows communication between the ventilation path and the exhaust port in such a manner as to release the pressure,
wherein the relief valve further includes
a pressure setting dial that has a disc-like shape and that is configured to be rotated to enable setting of the pressure at which the valve body is opened, and
a dial cover holding the pressure setting dial such that the pressure setting dial is rotatable,
wherein the dial cover includes a contact receiving portion that stops rotation of the pressure setting dial by coming into contact with the pressure setting dial, and
wherein the pressure setting dial includes a stopper that comes into contact with the contact receiving portion at a position at which an intermediate set pressure between a minimum set pressure and a maximum set pressure is set.
22 . The ventilator according to claim 21 ,
wherein the relief valve further includes an unlock button that releases contact between the stopper and the contact receiving portion by pushing the stopper and releases a rotation stop of the pressure setting dial heading in a direction from the intermediate set pressure toward the maximum set pressure.