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Device for manually ventilating a patient

  • US 4,502,481 A
  • Filed: 02/15/1983
  • Issued: 03/05/1985
  • Est. Priority Date: 02/15/1983
  • Status: Expired due to Fees
First Claim
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1. A device for the manual ventillation of a patient, comprising:

  • a. an inspiratory tube having a bore completely therethrough,b. said inspiratory tube having means at one end thereof adapted to be connected to a breathing gas source,c. adaptor means defining first and second flowpaths,d. said inspiratory tube having its opposite end attached to said adaptor means and communicating with said flow path,e. a patient connector attached to said adaptor means for receiving breathing gas from one of said paths for inhalation by the patient, and for returning patient exhalation of said breathing gas to said second flowpath,f. an expiratory tube, having a bore completely therethrough connected at one of its ends to said adaptor means and communicating with said second flowpath to receive said breathing gas when exhaled by the patient,g. a valve housing having two sections each having an inlet connected to the other end of said expiratory tube and an outlet, and comprising an adjustable, normally closed over-pressure valve in each section thereof,h. one of said valves being adjusted to set the peak inspiratory pressure,i. said other valve being adjusted to a weaker bias relative to said one valve to set the end expiratory pressure,j. each of said valves permitting a controlled flow of breathing gas from said outlets of said each section to the atmosphere,k. each of said over-pressure valves being separately adjustable so that the respective biasing forces of said two valves may be established to attain the respective desired positive peak inhalation and positive end exhalation pressures in the patient circuit,l. said valve said other valve therein comprising an outlet port structured for and subject to being finger occluded, whereby the operator manually, and with a single finger, establishes the duration and frequency of the inhalation and exhalation breathing cycle.

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