Thorax 1998;53:495-498 ( June )

Short paper

Domiciliary nocturnal intermittent positive pressure ventilation in patients with respiratory failure due to severe COPD: long term follow up and effect on survival S E Jones,^a S Packham,^a M Hebden,^b A P Smith^a

^a Chest Department, ^b Department of Anaesthesia, ^c Llandough Hospital & Community NHS Trust, Penarth, South Glamorgan CF62 2XX, UK

Correspondence to: Dr A P Smith.

Received 12 December 1996; Returned to authors 26 February 1997; Revised version received 27 January 1998; Accepted for publication 2 February 1998

BACKGROUNDThere is increasing interest in the use of non-invasive nocturnal intermittent positive pressure ventilation (NIPPV) in the management of patients with chronic hypercapnoeic (type II) respiratory failure. Although this treatment enables patients requiring mechanical ventilatory support to be treated more readily at home, few studies have been done to demonstrate its long term benefits in chronic obstructive pulmonary disease (COPD) and the application of NIPPV in these circumstances remains controversial.
METHODSEleven patients in severe stable chronic type II respiratory failure due to COPD who were unresponsive to conventional treatments experienced symptomatic hypercapnia when receiving sufficient supplementary oxygen to result in an arterial oxygen saturation (SaO₂) of >90%. They were assessed for treatment with NIPPV, and its effects were observed for over two years using arterial blood gas tensions, spirometric parameters and body mass index (BMI), survival, hospital admissions, use of general practitioner resources, and patient satisfaction.
RESULTSHospital admissions and GP consultations were halved after one year compared with the year before NIPPV and there was a sustained improvement in arterial blood gas tensions at 12 and 24 months when breathing air, despite progressive deterioration in ventilatory function. BMI did not change during the period of observation. The median survival was 920 days, with no patient dying within the first 500 days.
CONCLUSIONSDomiciliary NIPPV results in improvements in arterial blood gas tensions which are sustained after two years of treatment and reduces both hospital admissions and general practitioner visits by patients with severe COPD in hypercapnoeic respiratory failure. It is well tolerated and, although there was no control group, survival appears to be prolonged when these results are compared with those of the NOTT and MRC (LTOT) trials.

Keywords: home ventilation; chronic obstructive pulmonary disease; outcome measures

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© 1998 by Thorax
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