US 4,905,688 AGranted

Portable light weight completely self-contained emergency single patient ventilator/resuscitator

AssigneeFiggie International Inc.

InventorsReno L. Vicenzi, Thomas R. Findlay, III

Life of this patent

Estimating the term…

Loading patent…

Abstract

A portable light weight completely self-contained emergency single patient ventilator/resuscitating apparatus (10) usable at the scene of an emergency by persons with minimal training. The apparatus (10) includes a housing assembly (12) which supports a solid state oxygen generator which also acts as a power supply, the generator being in the form of a chlorate candle (20). The housing additionally supports a pump (90) in the form of a venturi ejector, a two-position valve (92), and suitable primary controls (93) which are utilized to control the inspiratory:expiratory (I:E) ratio, the inspiratory time, the expiratory time, the breaths per minute, the flow rate, the tidal volume, the minute volume, etc. Various fluid passageways (54, 58, 116, 118) interconnect the candle with the valve, and additional fluid lines (120, 138, 140, 146, 148) interconnect the valve with the pump and primary controls. The primary controls include a fixed volume timing chamber (132) which is disposed about the venturi ejector. The housing is provided with a void (98) adjacent the timing chamber, which void acts as an accumulator during the expiratory cycle. While the two-position valve is normally automatically switched between inspiratory and expiratory positions by the pirmary control, it may be manually switched from its expiratory position to its inspiratory position against full pilot line pressure by a secondary control including a push button (152) or the like when the operator desire to give extra breaths or sigh breaths. In addition, the push button can be so positioned that the valve may be maintained in its inspiratory position, which may be desirable when the patient is breathing on his own and only requires extra oxygen over that which he would normally receive from ambient air.

Claims23

Dependent claims

A portable, light weight, completely self-contained emergency single patient ventilator/resuscitator apparatus capable of operating without attention in a resuscitating mode during operation of a power supply to cyclically force air and oxygen into a patient's respiratory cavity during an inspiratory mode and then to permit the patient's respiratory cavity to expire during an expiratory mode;

the apparatus comprising:
a housing assembly, a portion of the housing assembly defining an accumulator open at first and second ends;
a power supply carried by the housing assembly and having a discharge portion, the power supply being capable when in operation of discharging oxygen through the discharge portion over a period of time at a pressure sufficiently great to force oxygen into a patient's lungs;
pump means carried by the housing assembly, the pump means having a suction portion, a discharge portion and a driving portion, the pump means being capable of being operated when the driving portion is operatively interconnected to the discharge portion of the power supply when the power supply is in operation, the pump means when being operated causing ambient air to be drawn into the pump means through the accumulator and suction portion, the ambient air to be mixed with oxygen within the pump means, and the mixed air and oxygen to be discharged through the discharge portion;
a two-position valve shiftable between inspiratory and expiratory positions and including an inlet port and first and second outlet ports, the valve when in the inspiratory position connecting the inlet port with the first outlet port, and the valve when in the expiratory position connecting the inlet port with the second outlet port;
first line means extending from the discharge portion of the power supply to the inlet port of the two-position valve;
further line means extending from the first and second outlet ports of the two-position valve to the driving portion of the pump means, the first end of the accumulator and to the suction portion of the pump;
outlet tubing having one end portion connected to the discharge portion of the pump means, and another end portion being adapted to be interconnected to a patient whereby mixed air and oxygen may be delivered to the patient during inspiratory operation of the ventilator/resuscitator;
and
control means interconnected with the two-position valve and capable of shifting the two-position valve between inspiratory and expiratory positions.

7 more elements

A portable light weight, completely self-contained emergency single patient ventilaftor/resuscitator apparatus capable of operating without attention in a resuscitating mode during operation of a power supply to cyclically force air and oxygen into a patient's respiratory cavity during an inspiratory mode and then to permit the patient's respiratory cavity to expire during an expiratory mode;

the ventilator/resuscitator comprising:
a housing assembly;
power supply carried by the housing assembly and capable when in operation of discharging oxygen through a discharge portion over a period of time at a pressure sufficiently great to force oxygen into a patient's lungs;
pump means disposed within the housing assembly, the pump means having a suction portion, a discharge portion and a driving portion, the pump means being capable of being operated when the driving portion is operatively interconnected to the discharge portion of the power supply and the power supply is in operation, the pump means when being operated causing ambient air to be drawn into the pump means through the suction portion, the ambient air to be mixed with oxygen within the pump means, and the mixed air and oxygen to be discharged through the discharge portion;
two-position valve shiftable between inspiratory and expiratory positions and including an inlet port and first and second outlet ports, the valve when in the inspiratory position connecting the inlet port with the first outlet port, and the valve when in the expiratory position connecting the inlet port with the second outlet port;
first line means extending from the discharge portion of the power supply to the inlet port of the two-position valve;
further line means extending from the first and second outlet ports of the two-position valve to the driving portion of the pump means, to a source of ambient air, and to the suction side of the pump;
control means interconnected with the further line means and the two-position valve, the control means being capable of shifting the two-position valve from one position to another position after a predetermined time period, the control means including primary control means housing a fixed volume timing chamber disposed about the pump means;
and
outlet tubing having one end portion connected to the discharge portion of the pump means, and another end portion being adapted to be interconnected to a patient whereby mixed air and oxygen may be delivered to the patient during inspiratory operation of the ventilator/resuscitator.

7 more elements

A portable, light-weight, completely self-contained emergency single patient ventilator/resuscitator apparatus capable of operating without attention in a resuscitating mode during operation of a power supply to cyclically force air and oxygen into a patient's respiratory cavity during an inspiratory mode and then to permit the patient's respiratory cavity to expire during an expiratory mode;

the ventilator/resuscitator comprising:
a housing assembly;
power supply carried by the housing assembly and capable when in operation of discharging oxygen through a discharge portion over a period of time at a pressure sufficiently great to force oxygen into a patient's lungs;
pump means disposed within the housing assembly, the pump means having a suction portion, a discharge portion and a driving portion, the pump means being capable of being operated when the driving portion is operatively interconnected to the discharge portion of the power supply and the power supply is in operation, the pump means when being operated causing ambient air to be drawn into the pump means through the suction portion, the ambient air to be mixed with oxygen within the pump means, and the mixed air and oxygen to be discharged through the discharge portion;
a two-position valve shiftable between inspiratory and expiratory positions and including an inlet port an first and second outlet ports, the valve when in the inspiratory position connecting the inlet port with the first outlet port, and the valve when in the expiratory position connecting the inlet port with the second outlet port;
power supply line means extending from the discharge portion of the power supply to the inlet port of the two-position valve;
inspiratory line means extending from the first outlet port of the two-position valve to the driving portion of the pump means and capable of delivering oxygen to the driving portion of the pump when the two-position valve is in its inspiratory position;
supplemental air line means interconnecting a source of ambient air with the suction side of the pump;
control means interconnected with the inspiratory line means and the two-position valve, the control means including primary control means capable of shifting the two-position valve from one position to another position after a predetermined time period, the primary control means including a timing volume chamber having first and second timing chamber ports, first and second control lines extending between the inspiratory line means and one of the timing chamber ports, each of the first and second control lines including a check valve and a fixed orifice restrictor, and pilot line means extending between the other timing chamber port and the two-position valve;
and
outlet tubing having one end portion connected to the discharge portion of the pump means, and another end portion being adapted to be interconnected to a patient whereby air and oxygen may be delivered to the patient during inspiratory operation of the ventilator/resuscitator.

8 more elements

A portable, light weight, completely self-contained emergency single patient ventilator/resuscitator apparatus capable of operating either with or without attention;

the ventilator/resuscitator comprising:
a housing assembly;
power supply carried by the housing assembly and capable when in operation of discharging oxygen through a discharge portion over a period of time at a pressure sufficiently great to force oxygen into a patient's lungs;
pump means disposed within the housing assembly, the pump means having a suction portion, a discharge portion and a driving portion, the pump means being capable of being operated when the driving portion is operatively interconnected to the discharge portion of the power supply and the power supply is in operation, the pump means when being operated causing ambient air to be drawn into the pump means through the suction portion, the ambient air to be mixed with oxygen within the pump means, and the mixed air and oxygen to be discharged through the discharge portion;
a two-position valve shiftable between inspiratory and expiratory positions and including an inlet port and first and second outlet ports, the valve when in the inspiratory position connecting the inlet port with the first outlet port, and the valve when in the expiratory position connecting the inlet port with the second outlet port, the two-position valve normally being spring biased to its inspiratory position;
power supply line means extending from the discharge portion of the power supply to the inlet port of the two-position valve;
inspiratory line means extending from the first outlet port of the two-position valve to the driving portion of the pump means;
supplemental air line means interconnected at one end to a source of ambient air and extending to the suction side of the pump;
primary control means including a pilot line interconnected with the two-position valve and when suitably pressurized being capable of shifting the two-position valve against spring bias from its inspiratory position to its expiratory position, and when not suitably pressurized permitting spring bias to dispose the valve in its inspiratory position;
manually operable secondary control means capable when suitably operated of shifting the two-position valve from its expiratory position to its inspiratory position against full pilot line pressure;
and
outlet tubing having one end portion connected to the discharge portion of the pump means, and another end portion being adapted to be interconnected to a patient whereby air and oxygen may be delivered to the patient during inspiratory operation of the ventilator/resuscitator.

9 more elements

Dependencies are inferred from the claim text.