Headgear for a respiratory mask and a method for donning a respiratory mask
Headgear for a respiratory mask includes a strap arrangement including front strap portions adapted to be disposed over a patient's cheeks and having front ends adapted for attachment to an airway interfacing portion, top strap portions connected to respective front strap portions and adapted to be disposed over the top of a patient's head and to connect to each other, and a back strap extending rearwardly from and connecting respective junctions of the front strap portions and top strap portions or regions adjacent these junctions and adapted to locate underneath a patient's occiput. In use with a patient having long hair, the back strap is adapted to extend under the patient's hair and urge upwardly on the patient's hair and against the patient's head beneath the occiput. In use with a patient having short hair, the back strap is adapted to urge against the patient's head beneath the occiput. In an embodiment, front strap portions of the headgear may be provided with a sleeve or cover (e.g., constructed of a fleece material) to enhance comfort in use.
1. A respiratory mask for delivering breathable gas to a patient for treatment of sleep disordered breathing, the respiratory mask comprising:
an airway interfacing portion configured to engage a patient's face to deliver the breathable gas to an airway of the patient; and
headgear to position and stably hold the airway interfacing portion in an operative position with respect to the patient's face when the respiratory mask is worn, the headgear comprising:
a pair of rigidizers, each rigidizer being configured to extend over the patient's cheek and between the patient's eye and ear on a respective side of the patient's face when the respiratory mask is worn;
a pair of top straps configured to extend from a respective side of the patient's head toward a top of the patent's head for length adjustable connection to one another when the respiratory mask is worn; and
a back strap configured to extend around a rear portion of the patient's head and urge against the patient's occiput when the respiratory mask is worn,
wherein each rigidizer has a fabric covering disposed around the rigidizer, the rigidizer having increased rigidity as compared to the fabric covering, the rigidizer being positioned between a face contacting side and a non-face contacting side of the fabric covering such that no other material layers are disposed between 1) the rigidizer and the face contacting side of the fabric covering, and 2) the rigidizer and the non-face contacting side of the fabric covering, and
wherein the fabric covering is secured in place on the rigidizer such that the fabric covering is not freely slidable along the rigidizer.
2. The respiratory mask as claimed in claim 1 , wherein the back strap is flexible and elastic.
3. The respiratory mask as claimed in claim 1 , wherein, in use, with a patient having long hair, the back strap is adapted to extend under the patient's hair and urge upwardly on the patient's hair and against the patient's head beneath the occiput, and wherein, in use, with a patient having short hair, the back strap is adapted to urge against the patient's head beneath the occiput.
4. The respiratory mask as claimed in claim 1 , wherein, in a transverse cross-sectional view of the headgear, the fabric covering extends laterally beyond the rigidizer to form lateral edge portions of the headgear that do not include the rigidizer.
5. The respiratory mask as claimed in claim 4 , wherein each of the face contacting side and the non-face contacting side of the fabric covering comprises opposing lateral edge portions, each of the lateral edge portions of the face contacting side being directly and fixedly adhered to a respective on of the lateral edge portions of the non-face contacting side to form the lateral edge portions of the headgear.
6. The respiratory mask as claimed in claim 1 , wherein the headgear is configured to, in use, extend around the top of the patient's ears and includes opposing depending portions configured to extend behind the patient's ears and terminate at a junction with the back strap such that the back strap extends rearwardly and downwardly in use.
7. The respiratory mask as claimed in claim 6 , wherein the headgear is not tensioned against the patient's ears in use.
8. The respiratory mask as claimed in claim 1 , where a line of joining between the pair of rigidizers and the back strap is at an angle other than substantially perpendicular to the general axial direction of the back strap at its ends.
9. The respiratory mask as claimed in claim 1 , wherein the back strap comprises a middle portion having a longitudinal slit therealong defining an upper back strap portion and a lower back strap portion which splay apart in use such that the back strap grips the head and/or hair better to stabilise the headgear.
10. The respiratory mask as claimed in claim 9 , wherein the slit comprises key-hole shaped enlarged radii at its ends.
11. The respiratory mask as claimed in claim 1 , wherein, in a transverse cross-sectional view of the headgear, the fabric covering extends laterally beyond the rigidizer to form lateral edge portions of the headgear that do not include the rigidizer, and
wherein each of the face contacting side and the non-face contacting side of the fabric covering comprises opposing lateral edge portions, each of the lateral edge portions of the face contacting side being directly and fixedly adhered to a respective one of the lateral edge portions of the non-face contacting side to form the lateral edge portions of the headgear.
12. The respiratory mask as claimed in claim 1 , wherein the fabric covering is secured in place on the rigidizer with a fastener.
13. The respiratory mask as claimed in claim 1 , wherein each top strap has a lower end at least indirectly connected to a respective one of the pair of rigidizers.
14. The respiratory mask as claimed in claim 13 , wherein the lower end of each top strap is at least indirectly connected to a rear end portion of the respective rigidizer.
15. The respiratory mask as claimed in claim 14 , wherein the lower end of each top strap is directly connected to the rear end portion of the respective rigidizer.
16. The respiratory mask as claimed in claim 1 , wherein each top strap has an upper end configured to be disposed on top of the patient's head when the respiratory mask is worn.
17. The respiratory mask as claimed in claim 1 , wherein the back strap has opposing ends, each end of the back strap being configured to at least indirectly connect to a respective one of the rigidizers.
18. The respiratory mask as claimed in claim 17 , wherein each rigidizer has a slot to receive a respective end of the back strap.
19. The respiratory mask as claimed in claim 18 , wherein the back strap is adjustable to accommodate differently sized and/or differently shaped heads.
20. The respiratory mask as claimed in claim 1 , wherein each rigidizer has a curved form configured to extend from adjacent the airway interfacing portion over the patient's cheek and between the patient's eye and ear on a respective side of the patient's face when the respiratory mask is worn.