SAMJ VOL. 78 15 DES 1990 741 10. Shephard JH, Bennet MJ, Lawrence D, Moore F, Sims CD. Prostaglandin vaginal suppositories: a simple and safe approach to the induction of labor. Obsrer Gynecol 1981; 58: 596-600. 11. Ulmsten U, Ingerup I., Belfrage P, Ekman G, Voistin W. Instracervical application of prostaglandin gel for induction of term labar. Obs!ec Gynecol 1982; 59: 336-339. Wingerup I., Andersan KE, Ulmsten U. Ripening of the uterine cen'ix and induction of labour at term with prostaglandin E 2 in viscolls Acta ObSlel Gynecol Scand 1978; 57: 403-406. 13. Laube DW, Zlamik FJ, Pitkin RM. Preinduction cervical ripening with prostaglandin E, intracervical gel. Obscec Gynecol 1986; 68: 54-57. 14. Dommisse J, Wild JM. Assessment of a new prostaglandin E, gel in labour induction. S Afr Med] 1987; 71: 506-507. 15. Graves GR, Basskell TF, Gray JH, Luther ER. The effect of vaginal admini- stration of various doses of prostaglandin E 2 gel on cervical ripening and induction of labor. Am] Obscec Gynecol1985; 151: 178-181. 16. Mainprize T, Nimrod C, Dodo G, Persad D. Clinical utility of multiple dose administration of prostaglandin E, gel. Am] Obscec Gynecol 1987; 156: 341-343. 3. Bernstein P, Leyland N, Gurland P, Gare D. Cervical ripening and labor induction with prostaglandin E, gel: a placebo controlled study. Am] Obscer Gynecol1987; 156: 336-340. 4. Gordon AJ, Calder AA. Oestradiol applied locally to ripen the unfavourable cervix. Lancec 1977; 2: 1319-1321. 5. Johnsan IR, MacPherson MBA, Welch CC, Filshie GM. A comparison of Lamicel and prostaglandin E, vaginal gel for cervical ripening before - " 12. induction of labour. Am] Obscec Gynecol1985; 151: 604-607. 6. Quinn MA, Murphy AJ, Kuhb RJP, Robinson HP, Brown JP. A double- blind trial of extra-amniotic oestradiol and prostaglandin E, gels in cervical ripening. Br] Obscec Gynaecol 1981; 88: 644-649. 7. Nicolaides K, Welch CC, MacPherson MBA, Johnson IR, Filshie GM. Lamicel - a new technique for cervical dilatation prior to first trimester aborrion. Br] Obscec Gynaecol1983; 90: 475-479. 8. Bishop EH. Pelvic scoring for elective inductions. Obscec Gynecol 1964; 24: 266-268. 9. Philpon RH, Castle WM. Cervicographs in the management of labour in primigravidae: 11. The action line and treatment of abnormal labour. ] Obscec Gynaecol Br Cwlth 1972; 79: 599-602. Die invloed van oefening-geinduseerde brongokonstriksie op georganiseerde sportdeelname E. TERBLANCHE, R. I. STEWART Summary Approximately 70 - 80% of all asthma sufferers develop acute airway obstruction with exercise, while at least 7% of children in the general population develop exercise-induced broncho- constriction. The purpose of this study was: (I) to determine whether children in the Cape Peninsula who suffer from asthma and/or exercise-induced bronchoconstriction are as inactive and uninvolved in sport as asthmatic children in the USA; and (il) whether this uninvolvement is a direct result of their susceptibility to exercise-induced bronchoconstriction. An in:depth study was done on the intensity, frequency and level of participation in sport by children with asthma and/or exercise-induced bronchoconstriction compared with a control group of healthy children without a history of asthma or exercise-induced bronchoconstriction. Children with asthma and/or exercise-induced broncho- constriction generally maintained a similar level of sport parti- cipation as healthy children, and only children with serious asthma or exercise-induced bronchoconstriction experienced limitations with regard to physical activity. It was found that, in contrast to children in the USA, non-participation in sport could not be explained by asthma and/or exercise-induced bronchoconstriction. S AIr Med J 1990; 78: 741-743. Departement Geneeskundige Fisiologie en Biochemie, Universiteit van Stellenbosch, Parowvallei, KP E. TERBLANCHE, HONS-B. IN LIGG. OPV., M.SC. (FIS!OLOG!E) R. 1. STEWART, M.B. CH.B., PH.D., F.C.C.P. Aanvaar 8 Mei 1990. Oefening-geinduseerde brongokonstriksie word kwamitatief gedefinieer as 'n afname na oefening van 10% of meer in die geforseerde ekspiratoriese volume in 1 sekonde (GEV 1 ) vanaf die basislynwaarde. 1 Na beraming ly sowat 2 - 6% van die wereldbevolking aan asma,2 terwyl die gerapponeerde voorkoms van oefening-geinduseerde brongokonstriksie by kinders uit die algemene bevolking van 7%3 tot 8,6%4 wissel. Oefening- geinduseerde brongokonstriksie kom soms in pasieme voor wat vir 'n paar jaar simptoomvry was en dit is al selfs opgemerk in pasieme met geen geskiedenis van asma nie. 5 Hieruit word afgelei dat 'n groot persentasie kinders waarskynlik in 'n mate beperkings ervaar wat hul fisieke vermoens betref, wat tot onderontwikkeling van motoriese vaardighede en psigososiale probleme mag lei. Beide die oorsake van oefening-geinduseerde brongo- konstriksie en die redes waarom sekere tipes oefeninge meer geredelik brongokonstriksie veroorsaak,. is onduidelik. Profilak- tiese behandeling met brongodilatore stel die meeste asmalyers in staat om 'n normale, aktiewe le we te lei, hoewel 'n kondisio- neringsprogram nie 'n asmalyer se vatbaarheid vii oefening- geinduseerde brongokonstriksie verminder nie. 6 Die verhoogde ftksheidsvlak wat met aktiewe sportdeelname gepaard gaan, sal hoogstens 'n asmalyer se uithouvermoe verbeter om sodoende sy drempelvlak vir brongospasma te verhoog. Na bewering sal 60% van kinders met asma in die VSA nie aktief aan liggaamlike opvoeding of fisieke aktiwiteit vir omspanning deelneem nie. 7 In 'n dwarssnit-studie oor die voorkoms van oefening-geinduseerde brongokonstriksie onder kinders in die noordelike voorstede in Kaapstad, is gevind dat 6,5% van blankes en 3,5% van kleurlinge (6 - 18 jaar) aan oefening-geinduseerde brongokonstriksie ly.B Aangesien hierdie voorkomssyfer met die in Amerika ooreenstem, was dit die doel van hierdie studie om te bepaal of kinders in die Kaapse Skiereiland met asma en/of oefening-geinduseerde brongo- konstriksie in dieselfde mate onaktief en onbetrokke by spon-