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Canadian Journal of Anesthesia, Vol 35, 468-472, Copyright © 1988 by Canadian Anesthesiologists' Society

ARTICLES

The oculorespiratory reflex revisited

VF Blanc, JL Jacob, J Milot and L Cyrenne
Department of Anaesthesia, Hopital Sainte-Justine, Montreal, Quebec.

Continuous measurement of the intratracheal pressure and capnography are very simple and accessible methods for the detection and recording of the oculorespiratory reflex (ORR). Eight healthy children (five to 14 years old) undergoing strabismus surgery under halothane-nitrous oxide anaesthesia with spontaneous ventilation were studied. The ORR was evoked by traction on the extrinsic muscles of the eye (four medial recti and four lateral recti). Slowing of the respiratory rate and/or shallow respiratory movements were observed in each patient. One patient developed apnoea of 20 seconds duration which forced the use of manually controlled ventilation. Intravenous atropine (0.01 mg.kg-1) reduced the incidence of positive OCR (to 37.5 per cent) but did not diminish the incidence of the ORR (100 per cent). Since the ORR may lead to hypercapnia and hypoxaemia, controlled ventilation is recommended for patients undergoing strabismus surgery at least immediately before and during the muscular traction. It is now clear that the ORR may be evoked by traction on the extrinsic muscles of the eye, may produce hypercapnia and hypoxaemia and so, may aggravate the consequences of the OCR.


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H. K. Kil and C. E. Allison
Hypercapnea Is an Important Adjuvant Factor of Oculocardiac Reflex During Strabismus Surgery Response
Anesth. Analg., October 1, 2000; 91(4): 1044 - 1044.
[Full Text] [PDF]

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C. E. Allison, J. J. De Lange, F. D. Koole, W. W. A. Zuurmond, H. H. Ros, and N. T. van Schagen
A Comparison of the Incidence of the Oculocardiac and Oculorespiratory Reflexes During Sevoflurane or Halothane Anesthesia for Strabismus Surgery in Children
Anesth. Analg., February 1, 2000; 90(2): 306 - 306.
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Copyright © 1988 by the Canadian Anesthesiologists' Society.