Combination anesthesia and intensive care apparatus

• US 4,148,312 A
• Filed: 10/08/1976
• Issued: 04/10/1979
• Est. Priority Date: 10/08/1976
• Status: Expired due to Term

• Current Assignee: 3M Company
• Original Assignee: 3M Company
• Inventors: Bird, Forrest M.
• Primary Examiner(s): Recla, Henry J.
• Application Number:
  US05/730,727
• Time in Patent Office: 914 Days
• Field of Search: 128/145.6, 128/145.8, 128/145.5, 128/188, 128/142.2, 128/377, 32/22, 128/203, 128/2 T, 128/2 V, 128/303.1, 312/209
• US Class Current: 128/204.25
• CPC Class Codes: A61G 12/008 mounted on a mobile base, e.g. on a trolley
• CPC Class Codes: A61G 15/00 Operating chairs; Dental chairs barbers' chairs A47C1/04; Accessories specially adapted therefor, e.g. work stands
• CPC Class Codes: A61G 2203/80 for connecting a trolley to a device, e.g. bed or column table
• CPC Class Codes: A61M 16/00 Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes stimulating the respiratory movement by mechanical, pneumatic or electrical means, iron lungs combined with gas breathing means A61H31/00
• CPC Class Codes: A61M 16/0051 with alarm devices
• CPC Class Codes: A61M 16/0075 Bellows-type
• CPC Class Codes: A61M 16/0081 Bag or bellow in a bottle
• CPC Class Codes: A61M 16/1015 using a gas flush valve, e.g. oxygen flush valve
• CPC Class Codes: A61M 16/22 Carbon dioxide-absorbing devices ; Other means for removing carbon dioxidecartridges with absorbing substances for respiratory apparatus A62B19/00

Abstract

Combination anesthesia and intensive care unit having an anesthesia apparatus in the form of an analgesia generator and a anesthesia respirator and with a vaporizer and CO₂ absorber mounted thereon. A removable chair assembly is connected to the stand and is to be used by the anesthesiologist in operating the anesthesia apparatus for intensive care. A respirator and a patient breathing monitoring apparatus are also mounted upon the stand. When used as an intensive care unit, the chair assembly can be disconnected from the stand.

Claims

1. In an anesthesia apparatus having an inhalation phase and an exhalation phase in its operative cycle for supplying anesthesia gases to a patient from a source of anesthesia gas, a controller having an inlet and an outlet with the inlet adapted to be connected to the source of anesthesia gases, the controller having control valve means movable between open and closed positions to control the flow of gases from the inlet to the outlet, said control valve means being in the open position during the inhalation phase and in the closed position during the exhalation phase, the controller having a diaphragm coupled to the control valve member and a chamber formed on the one side of the diaphragm, a canister, a bellows disposed in the canister, a patient adapter, means connecting the interior of the bellows to the patient adapter so that gases can be supplied from the interior of the bellows to the patient adapter and from the patient adapter to the interior of the bellows, means connecting the outlet of the controller to the interior of the canister, an exhalation valve assembly connected to the interior of the canister and having an exhalation valve movable between open and closed positions to control the flow of gases from the canister, means connected to the outlet of the controller and to the exhalation valve assembly for maintaining the exhalation valve assembly in a closed position during the inhalation phase, means connecting the interior of the canister to the chamber of the controller so that when a predetermined pressure is reached within the canister, the control valve member of the controller is moved to a closed position to terminate the inhalation phase and to initiate the exhalation phase, a venturi assembly including a jet disposed between the exhalation valve assembly and the interior of the canister and means for supplying a jet of gases to the venturi assembly during the exhalation phase so that the patient must exhale against a positive pressure.

2. Apparatus as in claim 1 wherein said means for supplying a jet of gases to the venturi assembly includes a control valve assembly having an inlet and an outlet with the inlet connected to the source of gas and having the outlet connected to the jet in the venturi assembly, a valve member movable between open and closed positions to control the flow of gas from the source to the jet in the venturi assembly and diaphragm operated means coupled to the interior of the bellows for moving the last named valve member between open and closed positions.

3. Apparatus as in claim 1 together with flow acceleration means including a flow acceleration cartridge having an inlet and an outlet with the inlet connected to the source of gas and the outlet coupled into the interior of the canister, a valve member movable between open and closed positions for controlling the flow of gas from the inlet to the outlet and diaphragm operated means for controlling the movement of the valve member, said diaphragm operated means including a diaphragm, a chamber disposed on the one side of the diaphragm and means for bleeding gas from the outlet of the controller into the last named chamber.

4. Apparatus as in claim 1 together with means for refilling the interior of the bellows when the bellows contains insufficient gases for the patient during the inhalation phase, said refilling means including a cartridge having an inlet and an outlet with the inlet connected to the source of gas and with the outlet connected into the interior of the bellows, a valve member movable between open and closed positions for controlling the flow of gas from the inlet to the outlet and diaphragm operated means including a diaphragm for controlling movement of the valve member between said open and closed positions and a chamber formed on one side of the diaphragm and means for supplying gas to the last named chamber when insufficient gas is supplied from the interior of the bellows to the patient to cause the valve member to move to an open position to permit additional gas to be supplied from the source to the interior of the bellows and to the patient.