Effects of mask-ventilator interface elements in a home noninvasive portable ventilator. Study in cold hypercapnic patients

Noninvasive mechanical ventilation (NIMV) in hypercapnic COLD exacerbations with a home portable ventilator with a single ventilatory tube has some technical considerations.

Objective

We analyze influence of elements used in the mask-ventilator interface in hypercapnic COLD with a NMV: To compare differents 1). Design of filters (A, B, C, D), 2) Non-rebreathing expiratory valve: a) Swisper and b) Plateau exhalation valve. 3) Rramp inspiratory time: (0,05, 0.1, 0.5 seg) affect a predetermined level inspiratory positive pressure (IPAP) (15 cmH₂O). 2) Hypercapnia (PCO₂) control and 3) Subjective responses: a) Dysnea Brog index (low: 2 to 10 high) and psychological dependence at different stages of therapy (low 2 to high 10).

Setting

ICU.

Subjects

Twelve hypercapnic COLD stable patients.

Material

BiPAP ST-D (Resp, Inc). Facial mask.

Results

See Table.

Conclusion

Subjective (dysnea Brog index), objective respiratory response (hypercapnia) and level of IPAP pressure applied during

Table 1

Table 2

Table 3