RESPIRATORY MASK ASSEMBLY WITH A DYNAMIC CUFF

Abstract

This invention is a device to be used with a system for supplying anaesthetic or respiratory gases into the airway of a human or an animal. This device is a face mask, which includes a main body or shell which is lined with one or more air filled cuffs of which at least one cuff is closely reflecting the airway pressures generated inside the shell during the various phases of the respiratory cycle and is inflated by the gases supplied directly from the anaesthesia or ventilator circuit through a specialised adaptor and a dedicated inflation port. Many other advantages of the invention will be apparent from reading the description which follows in conjunction with the accompanying drawings

Claims

1: this device a face mask which can be used in patients who are spontaneously breathing and also on patients who require positive pressure ventilation This device has a main body or shell which has adaptor end and the patient and

2: the face mask assembly as set forth in 1 wherein the adaptor end of the shell is connected to a specialised adaptor having three ports of which the largest proximal port is connected to a ventilator circuit or other ventilating Apparatus like the Ambu resuscitator

3: a specialised adaptor as set forth in claim 2, wherein, the smaller port at the distal end of the specialised adaptor is connected to a port which inflates the dynamic cuff through a dedicated channel.

4: a face mask assembly as set forth in claim 1, which has one or more dynamic cuffs, positioned above a conventional static cuff, winch when placed on the patient's face moulds and assumes the contours of the patient's face thereby producing an airtight seal.

5: a dynamic cuff as set forth in claim 4, which closely mimics, but exceeds the Airway pressure of the patient's Airway in different phases of respiration as reflected in the Shell of the face mask assembly, thereby transmitting the pressure on the static cuff which is in contact with the face the patient, thereby creating a pressure on the face which exceeds the airway pressure during positive pressure ventilation thereby ensuring an airtight seal.

6: dynamic cuff as set forth in claim number 4 which expands by flow of anaesthetic gases/air to the cuff through the dedicated adaptor port and channel

7: a dynamic cuff as set forth in claim number 4 which has one or more pores on the inner side (towards the shell) of the cuff which directly communicate with the intra shell portion of the face mask assembly at the end of respiratory cycle washing out the exhaled gases into the ventilator circuit thereby reducing the Dead Space of the Apparatus

8: a dynamic stuff as set forth in claim number 4, which has a foam like sponge made of polyurethane or similar material inside its lumen as an alternative embodiment thereby providing better airway seal and patient comfort

9: a face mask assembly as described in claim No 1, which has a static cuff at the patient end

10: static cuff as set forth in claim number 9 which has a dedicated inflation port

11: a static cuff of as set forth in claim number 9 which may have a sponge like foam inside its lumen as an alternative embodiment

12: the static cuff as set forth in claim No 9, has adhesive strips along its margin which comes into contact with the face of the patient

13: the Dynamic cuff of as set forth in claim No 4, wherein its position interchanged with the static cuff as in claim No 9. The interchange of the position the static and dynamic cuffs is an alternative embodiment

14: In alternative embodiments, the Static and Dynamic cuffs as set forth in claims 9 and 4 respectively can be placed one inside the other instead of one over the other position as set forth in the preferred embodiment: i.e, the static cuff can be placed inside the dynamic cuff surrounded by the latter on all directions and vice versa without deviating from the principle of this invention.

15: the Dynamic cuff as in the alternative embodiment set forth in claim 13 which has adhesive strips in the margin which is coming into contact with the face of the patient

16: the face mask assembly as set forth in claim No 1 which has a circular ring around the air inlet port of the cell which has 4 or more hooks

17: the circular ring h hooks as set forth in claim No 15 connected to harness belt made of stretchable material preferably silicone/Polythene/latex rubber or other similar materials enabling airtight approximation of the face mask against the face of the patient

18: the circular ring as set forth in claim No 15 which can be connected with a headgear enabling airtight positioning of the face mask assembly over the face of the patient

19: face mask assembly as set forth in claim No 1 which has inbuilt fragrant material making it pleasant for children

Description

DETAILED DESCRIPTION OF THE INVENTION

[0025] Fig No 1 shows the device as viewed front the side/lateral view. (1) denotes the body shell of the mask (2) denotes the Adaptor end where a specialised adaptor is connected. The specialised adaptor (3) has one proximal port (4) and two distal ports [shell port (5) and Dynacuff port (6)J. The proximal port is connected to the ventilator circuit through a standard connector. The shell port of the adaptor connects to the respiratory gas inlet of the shell body. The Dynacuff port of the specialised adaptor connects to the Dynacuff port of mask which leads to the dynamic cuff through a dedicated channel (8)

[0026] The Mask may be made of rigid plastic or any suitable transparent or opaque material. The specialised adaptor is made of rigid plastic or any other suitable material. The dynamic cuff (10) and the static cuff (9) are made either with polythene/silicone/latex rubber or any other suitable material.

[0027] Figure No 2 shows the specialised adaptor. Its proximal end contains the ventilator circuit port which contains a standard 22 mm male/15 mm female connector which can be connected to ventilator circuits or AMBU/other similar resuscitator bag. The mask end of the dedicated adaptor has two ports of which the shell port (5) gets connected to the air inlet port of the shell of the mask and the other port Dynacuff port (6) gets connected to the air inlet port (4) which leads to the dynacuff (10) through a dedicated channel (8).

[0028] Figure No. 3 is showing the device applied on the patients face and the showing the inflation of dynamic cuff during inspiratory phase.

[0029] Figure Number 4 is showing the device applied on the patients face and the showing the deflation of dynamic cuff during expiratory phase.