Pressure-controlled breathing aid

• US 20050139212A1
• Filed: 02/25/2005
• Published: 06/30/2005
• Est. Priority Date: 09/12/1994
• Status: Abandoned Application

• Current Assignee: Mallinckrodt Developpement France
• Original Assignee: Nellcor Puritan Bennett France Developpement
• Inventors: Bourdon, Guy
• Application Number:
  US11/066,797
• Publication Number:
  US 20050139212A1
• Time in Patent Office: Days
• US Class Current: 128/204.230
• 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 16/0069 the speed thereof being controlled by respiratory parameters, e.g. by inhalation
• CPC Class Codes: A61M 16/022 Control means therefor
• CPC Class Codes: A61M 16/20 Valves specially adapted to medical respiratory devices
• CPC Class Codes: A61M 2016/0036 in the breathing tube and used in both inspiratory and expiratory phase
• CPC Class Codes: A61M 2016/0039 in the inspiratory circuit
• CPC Class Codes: A61M 2016/0042 in the expiratory circuit

Abstract

The ventilation module (8) regulates the inspiratory pressure (P) according to an inspiratory pressure order (AI). A control module (9) compares the breathed volume at each cycle (VTI) with a minimum volume order (VRImini) and varies the pressure order (AI) in the direction tending to maintain the breathed volume (VTI) just over the minimum (VTImini), but keeping the pressure order (AI) within the interval comprised between the two extreme values (AImini, AImaxi). Utilization to combine the advantages of the pressure mode ventilation with those of the volumetric ventilation.

Claims

1. A breathing aid device, comprising:

a patient connection;

an inspiratory branch in fluid communication with said patient connection, said inspiratory branch including an inspiration valve;

an expiratory branch in fluid communication with said patient connection and said inspiratory branch;

means for controlling expiration in fluid communication with said expiratory branch, said means for controlling expiration including an expiration valve;

means for detecting pressure operatively connected to said inspiratory branch;

means for ventilating in fluid communication with said inspiratory branch, said means for ventilating including means for supplying a breathable gas through said inspiratory branch at an adjustable pressure, said means for ventilating further including means for controlling the inspiration valve and the expiration valve, wherein the inspiration valve is closed during expiration and the expiration valve is closed during inspiration, said means for ventilating further including pressure control means for comparing a pressure command to a pressure signal provided by said means for detecting pressure and for adjusting the pressure of the means for supplying; and

means for regulating a patient'"'"'s breathed volume, said means for regulating including means for controlling volume and means for measuring volume, wherein the means for controlling volume provides the pressure command to the pressure control means, and wherein the means for measuring volume provides a signal indicative of a measured volume of breathed gas to the means for controlling volume.