Figures
- FIGURE 1
Schematic of experimental apparatus. CPAP: continuous positive airway pressure.
- FIGURE 2
Final customised mask. a) Portion of mask labelled “coupler” (front) interfaces with the headgear and hosing that conducts positive pressure from the continuous positive airway pressure (CPAP) machine. The “cushion” (back) contacts the subject's face. b) Demonstration of the coupler attached to the headgear and hosing of the Wisp CPAP system. c) Customised mask worn in situ.
- FIGURE 3
a) Top-down view of all six customised cushions; b) front view of all six customised cushions.
- FIGURE 4
a) Assembled mould box components with one component removed for visualisation. Outer mould shown in magenta, inner mould shown in black. b) Demonstration of custom cushion created after injection of cavity with silicone (white).
- FIGURE 5
Mask air leak for each subject's preferred commercial continuous positive airway pressure mask and their customised counterparts at an appropriate fit (350 g). SLPM: standard litres per minute.
Tables
- TABLE 1
Average mask air leak for varying continuous positive airway pressure (CPAP) mask, CPAP level and mask tightness
Mask air leak SLPM CPAP level cmH2O 4 8 12 Petite 100 g 27±13 48±15 60±22 350 g 9±5 17±9 27±15 600 g 2±2 5±2 8±4 Small/medium 100 g 17±19 37±23 44±19 350 g 3±1 7±4 13±9 600 g 1.1±0.5 1.3±0.5 3±2 Large 100 g 19±14 28±16 29±5 350 g 5±6 16±16 18±10 600 g 3±3 9±7 13±11 Custom 100 g 9±2 28±11 45±20 350 g 5±2 11±3 18±4 600 g 5±3 8±4 11±2 Data are presented as mean±sd. n=6. SLPM: standard litres per minute.
- TABLE 2
Differences in air leak between masks for varying continuous positive airway pressure (CPAP) level and mask tightness
CPAP level cmH2O 4 8 12 100 g No differences No differences P>L 350 g No differences No differences P>SM 600 g C>P P, C>SM P, C>SM P: petite; L: large; SM: small/medium; C: custom. Mask pairings were observed to have significantly different mask air leaks when p<0.05 in post hoc analysis.
