Respirator and a method of utilizing the respirator to promote blood circulation

• US 4,676,232 A
• Filed: 09/16/1986
• Issued: 06/30/1987
• Est. Priority Date: 11/19/1982
• Status: Expired due to Fees

• Current Assignee: Siemens-Elema AB (Siemens AG)
• Original Assignee: Siemens-Elema AB (Siemens AG)
• Inventors: Jonson, Bjorn, Olsson, Sven G.
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): NOT, DEFINED
• Application Number:
  US06/908,949
• Time in Patent Office: 287 Days
• Field of Search: 128/28, 128/30, 128/30.2
• US Class Current: 601/41
• CPC Class Codes: A61H 2201/0103 inflatable
• CPC Class Codes: A61H 2201/1238 with hydraulic or pneumatic drive
• CPC Class Codes: A61H 2201/165 Wearable interfaces
• CPC Class Codes: A61H 2205/08 Trunk
• CPC Class Codes: A61H 2230/04 Heartbeat characteristics, e.g. E.G.C., blood pressure modulation
• CPC Class Codes: A61H 31/006 Power driven
• CPC Class Codes: A61H 9/0078 with intermittent or alternately inflated bladders or cuffs mattresses for preventing bed-sores with alternated pressurized chambers A61G7/05776
• CPC Class Codes: A61M 16/024 including calculation means, e.g. using a processor
• CPC Class Codes: A61M 16/0461 Nasoendotracheal tubes
• CPC Class Codes: A61M 16/204 used for inhalation control
• CPC Class Codes: A61M 16/205 used for exhalation control
• CPC Class Codes: A61M 2230/005 Parameter used as control input for the apparatus
• CPC Class Codes: A61M 2230/04 Heartbeat characteristics, e.g. ECG, blood pressure modulation

Abstract

A method and device to support blood circulation during ventilation of the lungs which include controlling the application of the respiratory gases to occur at a particular point in time in the heart activity, and applying a uniform pressure to resist expansion of the thorax cavity to increase pressure on the heart during the heart'"'"'s systole. The device which applies a respiratory gas and the uniform pressure includes a control device which senses the heart'"'"'s activity to determine the desired point in time of the heart cycle.

Claims

1. A method for respiration of a patient within the heart rhythm and for the promotion of blood circuilation, said method including the steps of applying a respiratory gas to the lungs of the patient;

restricting the expansion of a substantial portion of the chest and abdomen of the patient by applying a uniform non-deforming, volume limiting force to the chest and abdomen opposing the expansion of the chest and abdomen; and

synchronizing the steps of applying the respiratory gas and applying the uniform force so that the respiratory gas is applied during a given point in time of the heart cycle with the application of the uniform force creating a pressure rise around the heart to coincide with the contraction phase of the heart.

2. A method according to claim 1, wherein the step of applying a uniform force includes adjusting the point in time, duration and magnitude of the uniform force.

3. A method according to claim 1, wherein the step of applying the respiratory gas includes adjusting the point in time, duration and pressure of the respiratory gas.

4. A method according to claim 3, wherein the step of applying a uniform force includes adjusting the point in time, duration and magnitude of the uniform force.

5. A method according to claim 4, wherein the step of adjusting the time, pressure and duration of the respiratory gas and of the uniform pressure enables adjusting the length of the pause between an inspiration phase and an expiration phase.

6. A method according to claim 4, wherein the step of synchronizing includes detecting electrical signals of the heart and utilizing these to determine the point of time in the heart cycle for applying the respiratory gas and the uniform pressure.

7. A method according to claim 1, wherein the step of synchronizing includes sensing electrical signals of the heart and utilizing the sensed signals to determine the point of time for applying the respiratory gas and the uniform pressure.

8. A method as claimed in claim 1, wherein the step of restricting the expansion of the chest and abdomen of the patient is further defined by surrounding the chest and abdomen of said patient with a substantially rigid, non-expanding vest.