Kinetic therapy improves oxygenation in critically ill pediatric patients.
OBJECTIVE
To compare changes in oxygenation after manual turning and percussion (standard therapy) and after automated rotation and percussion (kinetic therapy).


METHODS
Randomized crossover trial.


METHODS
General and cardiac pediatric intensive care units.


METHODS
Intubated and mechanically ventilated pediatric patients who had an arterial catheter and no contraindications to using a PediDyne bed.


METHODS
Patients were placed on a PediDyne bed (Kinetic Concepts) and received 18 hrs blocks of standard and kinetic therapy in an order determined by randomization.


RESULTS
Arterial blood gases were measured every 2 hrs during each phase of therapy. Oxygenation index and arterial-alveolar oxygen tension difference [P(A-a)O(2)] were calculated. Indexes calculated at baseline and after each 18-hr phase of therapy were analyzed. Fifty patients were enrolled. Data from 15 patients were either not collected or not used due to reasons that included violation of protocol and inability to tolerate the therapies in the study. Indexes of oxygenation were not normally distributed and were compared using Wilcoxon signed rank testing. Both therapies led to improvements in oxygenation, but only those from kinetic therapy achieved statistical significance. In patients receiving kinetic therapy first, median oxygenation index decreased from 7.4 to 6.19 (p = .015). The median P(A-a)O(2) decreased from 165.2 to 126.4 (p = .023). There were continued improvements in oxygenation after the subsequent period of standard therapy, with the median oxygenation index decreasing to 5.52 and median P(A-a)O(2) decreasing to 116.0, but these changes were not significant (p = .365 and .121, respectively). When standard therapy was first, the median oxygenation index decreased from 8.83 to 8.71 and the median P(a-a)o(2) decreased from 195.4 to 186.6. Neither change was significant. Median oxygenation index after the subsequent period of kinetic therapy was significantly lower (7.91, p = .044) and median P(A-a)O(2) trended lower (143.4, p = .077).


CONCLUSIONS
Kinetic therapy is more efficient than standard therapy at improving oxygenation and produces improvements in oxygenation that are more persistent.
Schultz
Theresa Ryan
TR
Sedation and Vascular Access Service, Department of Radiology, University of Pennsylvania, Philadelphia, PA 19104, USA. Schultz@email.chop.edu
Lin
Richard
R
Francis
Barbara A
BA
Hales
Roberta L
RL
Colborn
Shawn
S
Napoli
Linda A
LA
Helfaer
Mark A
MA
D000704:Analysis of Variance; D001331:Automation; D001513:Beds; D002648:Child; D002675:Child, Preschool; D018592:Cross-Over Studies; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D010100:Oxygen / Q000378:metabolism*; D026741:Physical Therapy Modalities / Q000295:instrumentation*; D011175:Positive-Pressure Respiration; D011659:Pulmonary Gas Exchange; D012399:Rotation; D018709:Statistics, Nonparametric
D010100:Oxygen