Chest wall kinematics in patients with hemiplegia.
Owing to difficulties in measuring ventilation symmetry, good evidence of different right/left respiratory movements has not yet been provided. We investigated VT differences between paretic and healthy sides during quiet breathing, voluntary hyperventilation, and hypercapnic stimulation in patients with hemiparesis. We studied eight patients with hemiparesis and nine normal sex- and age-matched subjects. Right- and left-sided VT was reconstructed using optoelectronic plethysmography. In control subjects, no asymmetry was found in the study conditions. VTs of paretic and healthy sides were similar during quiet breathing, but paretic VT was lower during voluntary hyperventilation in six patients and higher during hypercapnic stimulation in eight patients (p = 0.02). The ventilatory response to hypercapnic stimulation was higher on the paretic than on the healthy side (p = 0.012). In conclusion, hemiparetic stroke produces asymmetric ventilation with an increase in carbon dioxide sensitivity and a decrease in voluntary ventilation on the paretic side.
Lanini
Barbara
B
Fondazione Don C. Gnocchi (IRCCS), Via Imprunetana, 124 50020 Pozzolatico, Florence, Italy. riabrfi@tin.it
Bianchi
Roberto
R
Romagnoli
Isabella
I
Coli
Claudia
C
Binazzi
Barbara
B
Gigliotti
Francesco
F
Pizzi
Assunta
A
Grippo
Antonello
A
Scano
Giorgio
G
D000328:Adult; D000368:Aged; D001696:Biomechanical Phenomena; D001827:Body Height; D016022:Case-Control Studies; D005260:Female; D005541:Forced Expiratory Volume; D006429:Hemiplegia / Q000000981:diagnostic imaging / Q000503:physiopathology*; D006801:Humans; D006935:Hypercapnia / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D010991:Plethysmography; D015656:Respiratory Mechanics; D013147:Spirometry; D035441:Thoracic Wall / Q000503:physiopathology*; D013990:Tidal Volume; D014057:Tomography, X-Ray Computed; D014797:Vital Capacity