Patient transport, plural power source suction apparatus

• US 5,449,347 A
• Filed: 07/05/1994
• Issued: 09/12/1995
• Est. Priority Date: 07/05/1994
• Status: Expired due to Fees

• Current Assignee: Air Force Department of United States of America, The United States of America As Represented By The Secretary of Agriculture
• Original Assignee: United States Of America As Represented By The Secretary Of The Air Force
• Inventors: Waters, Thomas, Preen, Philip J.
• Primary Examiner(s): KRUTER, JEROME
• Application Number:
  US08/273,443
• Time in Patent Office: 434 Days
• Field of Search: 604/317, 604/318, 604/118, 604/119, 128/760, 128/761, 128/765
• US Class Current: 604/118
• CPC Class Codes: A61M 1/71 Suction drainage systems containers therefor A61M1/60, A61M1/64; negative pressure wound therapy systems A61M1/90
• CPC Class Codes: A61M 1/732 Visual indicating means for vacuum pressure
• CPC Class Codes: A61M 1/741 with means for varying suction manually
• CPC Class Codes: A61M 2205/8206 battery-operated

Abstract

A portable, patient assignable, medical suction apparatus usable especially in the medical evacuation field. The suction apparatus includes self contained battery energy sourcing in addition to capability of operation and battery charging from a variety of alternating and direct current energy sources as are commonly available in transportation vehicles and ground based medical facilities. The disclosed apparatus includes provisions for suction canister usage, electromagnetic interference reduction, mounting on an existing aircraft stanchion and shelf and hand carriage to a patient'"'"'s bedside. Military usage and possible civilian usage are also disclosed.

Claims

1. Individual patient assignable portable medical suction generating apparatus comprising the combination of:

a low voltage direct current electrical energy operable suction pump member received in a hand carriable and patent litter apparatus mountable housing member;

a manually adjustable suction pressure controlling member shunt connected to a suction conduit member joining a suction inlet port of said suction pump member and a suction communicating port of said apparatus;

a rechargeable electrical battery member physically received within said housing member and having a nominal low voltage terminal potential that is compatible with said suction pump member;

first electrical input port means for receiving externally sourced direct current electrical energy into said apparatus;

first means for converting direct current electrical energy received at said first electrical input port means to battery charging direct current energy and suction pump operating direct current energy of said battery member nominal low terminal voltage level;

second electrical input port means for receiving externally sourced alternating current electrical energy of predetermined differing voltage level and differing alternation frequency characteristics into said apparatus;

second means for converting alternating current electrical energy received at said second input port means to battery charging direct current electrical energy and suction pump operating direct current electrical energy of said battery member nominal low terminal voltage level;

switching means for selecting between electrical energy input from said electrical battery member, said first input port means and said second input port means in response to manual and predetermined automatic selection criteria for energizing said suction pump member;

electronic timing circuit means responsive to a manual election input for operating said suction pump member in either a predetermined cycle of energized and non energized operating events or a continuously energized operating event.

2. The apparatus of claim 1 wherein said housing member includes engagement means for temporarily mounting said apparatus on a vertically disposed litter stanchion of a medical transport aircraft.

3. The apparatus of claim 1 further including first disposable suction canister mounting means received on said housing member for collecting body fluids removed from a patient by said apparatus.

4. The apparatus of claim 3 further including a second of said disposable suction canister mounting means received on said housing member.

5. The apparatus of claim 3 further including a front panel portion of said housing member which includes:

a suction pressure indicating gauge;

a suction pressure valve member;

signal lamps for;

suction pump operation, charging of said electrical battery member, low output voltage of said electrical battery member, and operation from said electrical battery member;

a master ON OFF switch;

a predetermined cycle-continuously energized manual election switch; and

input selection switch means for selecting between said first electrical input port means direct current electrical energy and said second electrical input port means alternating current electrical energy.

6. The apparatus of claim 1 wherein said electronic timing circuit means includes electronic circuits for generating a ten seconds "ON", 20 seconds "OFF" operating cycle of said apparatus.

7. The apparatus of claim 1 wherein said externally sourced direct current electrical energy has a nominal potential difference of twenty eight volts and wherein said electrical battery member has a nominal terminal potential that is less than said twenty eight volts.

8. The apparatus of claim 7 wherein said electrical battery member has a nominal terminal potential of twelve volts.

9. The apparatus of claim 7 wherein said first means for converting direct current electrical energy, includes a direct current to direct current converter apparatus having a switching regulator circuit.

10. The apparatus of claim 1 wherein said externally sourced alternating current energy includes a combination of a nominal voltage selected from the voltages of one hundred fifteen and two hundred thirty volts;

and a nominal frequency selected from the frequencies of fifty, sixty, and four hundred Hertz.

11. The apparatus of claim 10 wherein said second means, for converting alternating current electrical energy, includes a step down transformer having a pair of one hundred fifteen volt primary windings connectable in series or parallel and a full wave rectifier circuit.

12. The apparatus of claim 1 wherein said manually adjustable suction pressure controlling member includes a manually positionable needle valve member and wherein said needle value member enables a control of suction pressures between zero and negative five hundred sixty millimeters of mercury.

13. The apparatus of claim 1 wherein said switching means includes voltage responsive circuit means for energizing said suction pump member from said electrical battery member in response to a decrease in voltage potential difference in a selected one of said externally sourced direct current electrical energy and said externally sourced alternating current electrical energy.

14. The apparatus of claim 1 wherein said suction pump member has an electrical rating of one tenth horsepower, twelve volts at eight amperes and said electrical battery member has a nominal rating of twelve volts and ten ampere-hours.

15. The apparatus of claim 1 further including electrical filtering means received is said housing member for suppressing radio frequency interference signals originating in said apparatus and vacuum flow mechanical filtering means for excluding solid and liquid substances from said suction pump member.

16. Portable self contained and external energized medical suction generating apparatus for individual patient assignment during battle field, short and long distance transportation vehicle and temporary hospitalization environment usage, said apparatus comprising the combination of:

a hand carriable portable housing member having a center of gravity disposed handle member, vibration resistant elastic-frictional feet members and an aircraft patient litter vertical stanchion receptacle engagement member received thereon;

a twelve volt direct current electrical energy operable suction pump member of five hundred sixty millimeters of mercury column suction capability received in said portable housing member;

a twelve volt ten ampere hour gelled electrolyte rechargeable electrical battery member received in said portable housing member;

a suction level measuring gauge of at least said five hundred sixty millimeters of mercury suction capacity received in a frontal panel portion of said housing;

a suction level controlling manually operable value member also received in said frontal panel portion of said housing member;

disposable suction canister mounting means received in a plurality of locations on said portable housing member;

first electrical input energy conveying means communicating into said housing member for supplying externally sourced twenty eight volt direct current electrical energy from an aircraft receptacle source to said apparatus;

DC to DC first electrical energy conversion means received in said housing member and including solid state electronic switching means for converting said twenty eight volt direct current electrical energy to twelve volt electrical energy;

second electrical input energy conveying means communicating into said housing member for supplying externally sourced alternating current electrical energy of one of the potentials of one hundred fifteen and two hundred thirty volts and one of the alternation frequencies of fifty, sixty and four hundred Hertz;

AC to DC second electrical energy conversion means received in said housing member and including a dual voltage primary winding inclusive step down transformer member and a full wave bridge rectifier connected secondary winding for converting said alternating current electrical input energy to twelve volt electrical energy for charging said electrical battery member and energizing said suction pump member;

manually operable electrical switching means received on said housing member frontal panel portion for selecting between said external direct current and alternating current electrical energy sources for charging said electrical battery member and energizing said suction pump member;

electrical switching means responsive to a selected electrical potential output of said first and second electrical energy conversion means for energizing said suction pump member from said electrical battery member upon failure of said selected electrical output from said receptacle sources;

electronic tinning circuit means received in said housing and responsive to a manual selection switch member received in said front panel portion for energizing said suction pump member in a ten seconds ON twenty seconds OFF operating cycle;

electrically energized visual illumination means received in said front panel portion for indicating to a human observer one or more operating events of;

present functioning of said suction pump member,

a predetermined degree of discharge status of said electrical battery member,

present energization of said suction pump member from said electrical battery member and ensuing re charge of said battery member;

circuit breaker means received in a back panel portion of said housing member for disconnecting said external direct current and alternating current electrical energy sources from said apparatus in response to current flow in excess of predetermined amplitudes therefrom;

radio frequency noise suppression means connected with said first and second electrical energy conversion means for limiting radio frequency spectrum noise emissions from said apparatus.