Table 3.
Oxygen blending modalities for CPAP in low resource settings.
| No blending | Blending via ambient air entrainment device | Blending via air compressor in CPAP device | Blending with high pressure (wall) sources | |
|---|---|---|---|---|
| Range of percent oxygen | 100% | 30–100% | 21–100% | 21–100% |
| Availability in low resource facilities | Most frequently used | Not yet commercially available | Increasingly in use | Generally limited to tertiary facilities |
| Components Required | – Oxygen tank or concentrator | – Oxygen tank or concentrator | Medium cost CPAP device or stand-alone air compressor Oxygen tank or concentrator | High precision blender High pressure air and oxygen sources |
| Relative Cost | $ | $$ | $$$ | $$$$$ |
| Example devices | WHO (83) | PATH (77) Vayu (107) Minnesota (108) |
Pumani (94) Diamedica (92) Polite (93) |
Precision medical (109) Bio-med devices (110) |