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Vol. 26. Issue 3.
Pages 98-102 (April 1990)
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Vol. 26. Issue 3.
Pages 98-102 (April 1990)
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Escoliosis idiopática. función respiratoria antes y después de su corrección quirúrgica. Evolución al término de un año
Idiopathic scoliosis. Respiratory function before and after surgical correction. One year evolution.
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8170
A. De Diego, P. Morales, V. Macian, M. Palau, V. Marco
Servicio de Neumología, Hospital la Fe. Valencia
J.L. Bas*
* Servicio de Ortopedia. Hospital la Fe. Valencia
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La escoliosis, cuando es importante, suele acompañarse de un deterioro de la función respiratoria. Su corrección quirúrgica, si bien reduce el grado de deformidad osteomuscular, muestra unos resultados muy variables sobre la función respiratoria.

En nuestro estudio hemos analizado la relación entre el grado de escoliosis, determinado por el ángulo de Cobb, y las posibles alteraciones en la exploración funcional respiratoria, así como las modificaciones producidas un año después de su corrección quirúrgica, por el método de Harrington.

Estudiamos 25 pacientes de ambos sexos, de edad media 19 años, con escoliosis idiopática (ángulo de Cobb: 64°±28°) y sin otra patología respiratoria. Los resultados preoperatorios de la función pulmonar, expresados como porcentajes del valor teórico y como x±DE, fueron: FVC (78±19%), RV (75±23%), TLC (80±16%), FRC (79±22%), FEV1 (81±15%), sDLCOSB (89±19%), sGAW (0,151±0,050 cm H2O-1s-1), PI max (77±20 cm H2O). PaO2 (93±8 mmHg), Pa CO2 (32±3 mmHg) y P(A-a)O2 (22±8 mmHg). La correlación del grado de deterioro funcional con el ángulo de Cobb, únicamente fue significativa para la FVC, FEV1 y PaO2.

Al año de la intervención, el ángulo de Cobb disminuyó significativamente (39°±19°), observándose sólo una mejoría significativa en el intercambio gaseoso (PaO2 98±4 mmHg y P(A-a)O2 16±4 mmHg).

Al analizar los resultados, observamos que esta mejoría se producía principalmente a expensas de los pacientes con ángulo de Cobb > 55°, mientras que aquellos con ángulo de Cobb < 55°, no sólo no mejoraban la función respiratoria sino que tampoco disminuía significativamente el grado de deformidad.

When scoliosis is significant it is usually associated with an impairment of respiratory function. Altrough surgical therapy reduces the degree of neuromuscular deformity, its results on respiratory function are very variable.

In the present study we evaluated the relation between the degree of scoliosis, measured, by Cobb's angle, the possible abnormalities in respiratory functional test and their change one after surgical correction with Harrington's technique. We investigated 25 patients, both males and females (mean age 19 years), with idiopathic scoliosis (Cobb's angle 64°±28°) and no other respiratory disease. The preoperative results of pulmonary function test were as follows, given as percentages of the predicted value and as X±SD: FVC (78±19%), RV (75±23%), TLC (80±16%), FRC (79±22%), FVE1 (81±15%), sDLCOSB (89±19%), sGAW (0,151±0,50 cm H2O-1s-1), Px max (77±20 cm H2O), PaO2 (93±8 mmHg), PaCO2 (32±3 mmHg) and P(A-a)22±8 mmHg). The correlation of functional impairment with Cobb's angle was significant only for FVC, FEV1 and PaO1. One year after operation, Cobb's angle was significantly redu-ced (39°±19°), a significant improvement being only found for gas exchange (PaO2 98±4 mmHg and P(A-a)O2 16±4 mmHg).

In the analysis of the results we found that this improvement was achived mainly in patients with Cobb's angle > 55°, while in those in witch in which it was < 55° no only respiratory function did not improve but also the deformity degree was not significantly reduced.

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Copyright © 1990. Sociedad Española de Neumología y Cirugía Torácica
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