a three year old boy with delayed separation of the umbilical cord, recurrent pyogenic infections and common variable immundeficiency is presented. the immunoglobulin measurement was severely abnormal. to the best of our knowledge, the existance of leukocyte adhesion disorder together with common variable immunodeficiency (cyid) in a patient has not been reported prior to this study.

variability of tidal volume and respiratory rate in normally breathing man has long been demonstrated [1]. however because of lack of knowledge and technology primary ventilators could only deliver a fixed tidal volume in a fixed rate the so called volume controlled ventilation (vcv). vcv was volume preset time triggered and cycled and there was no synchronization with patient’s breaths. at tha...