Time course and recovery of arterial blood gases during exacerbations in adults with Cystic Fibrosis.
BACKGROUND
Hypoxia and hypercapnia are closely linked to morbidity and mortality in patients with Cystic Fibrosis (CF). The aims of this study were to describe the changes in blood gases during and following an acute pulmonary exacerbation in adults with CF.


METHODS
We performed a prospective observational study of patients with CF admitted for management of an acute exacerbation. Blood gas and spirometric analysis was performed on admission, throughout the treatment period, and 31 days after discharge (day 45).


RESULTS
At presentation, eight of nineteen patients had evidence of either hypoxia (PaO(2)<8 kPa) and/or hypercapnia (PaCO(2)>6.6 kPa). Blood gas parameters stabilized following two weeks of intravenous antibiotic therapy, with little difference evident in between treatment completion and subsequent review following discharge. Hypercapnia reversed in three patients, with persistent hypercapnia evident in two patients.


CONCLUSIONS
In our study group, hypoxemia and hypercapnia were frequently observed at presentation of the acute exacerbation. Blood gases stabilized following two weeks of intravenous antibiotic therapy, with arterial PCO(2) one month following hospital discharge generally similar to that at time of discharge.
Waterhouse
D F
DF
Department of Respiratory Medicine, St. Vincent's University Hospital, Ireland.
McLaughlin
A M
AM
Gallagher
C G
CG
D000328:Adult; D000900:Anti-Bacterial Agents / Q000627:therapeutic use; D001784:Blood Gas Analysis; D001993:Bronchodilator Agents / Q000627:therapeutic use; D003550:Cystic Fibrosis / Q000097:blood* / Q000150:complications* / Q000188:drug therapy; D018450:Disease Progression; D004359:Drug Therapy, Combination; D005260:Female; D006801:Humans; D006935:Hypercapnia / Q000097:blood / Q000209:etiology*; D000860:Hypoxia / Q000097:blood / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D020127:Recovery of Function; D013147:Spirometry; D055815:Young Adult
D000900:Anti-Bacterial Agents; D001993:Bronchodilator Agents