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report of the rapid assessment of vesico-vaginal fistulae in nigeria

report of the rapid assessment of vesico-vaginal fistulae in nigeria

report of the rapid assessment of vesico-vaginal fistulae in nigeria

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AETIOLOGICAL FACTORS OF VVFObstructed labour is <strong>the</strong> precedent <strong>of</strong> most cases <strong>of</strong> VVF <strong>in</strong> Nigeria (3). InLawson’s series <strong>of</strong> 377 patients he operated upon at University College HospitalIbadan, 97.7% <strong>of</strong> <strong>the</strong> cases were due to obstetric causes. (3) The various obstetriccauses <strong>in</strong> this series <strong>in</strong>cluded; obstructed labour 343 (92.9%), operatic trauma dueto <strong>vag<strong>in</strong>al</strong> delivery 4 (1.1%), operative trauma dur<strong>in</strong>g caesarean section 15 (4.1%)and ruptured scar 7 (1.9%).In a study <strong>of</strong> 1443 patients with VVF operated upon <strong>in</strong> Zaria, 83.8% were due tolabour complications. (17) In a series <strong>of</strong> 840 cases <strong>of</strong> VVF at <strong>the</strong> University <strong>of</strong>Nigeria Teach<strong>in</strong>g Hospital <strong>in</strong> Enugu, 98% <strong>of</strong> <strong>the</strong> cases were due to obstetriccauses. (29)In Waaldijk’s series <strong>in</strong> Kats<strong>in</strong>a, 470 out <strong>of</strong> 500 (94%) <strong>of</strong> cases operated over fiveyears were due to obstetric causes. Prolonged obstructed labour due tocephalopelvic disproportion rema<strong>in</strong>s <strong>the</strong> major cause <strong>of</strong> VVF. The prolonged andunrelieved pressure <strong>of</strong> <strong>the</strong> present<strong>in</strong>g part <strong>of</strong> <strong>the</strong> foetus aga<strong>in</strong>st <strong>the</strong> maternal pelvicwall results <strong>in</strong> necrosis <strong>of</strong> <strong>the</strong> <strong>in</strong>terven<strong>in</strong>g vag<strong>in</strong>a, bladder and o<strong>the</strong>r structures <strong>in</strong><strong>the</strong> area. The mechanical mechanism by which VVF is formed follow<strong>in</strong>gobstructed labour has been well described for years (5).In <strong>the</strong> Zaria VVF study, 50.9% <strong>of</strong> <strong>the</strong> patients with VVF due to labour had been <strong>in</strong>labour for 2 or 3 days before delivery and 18.1% <strong>report</strong>ed hav<strong>in</strong>g been <strong>in</strong> labourfor more than 4 days (17). The cl<strong>in</strong>ical condition <strong>of</strong> <strong>the</strong> patients with suchprolonged labours seen <strong>in</strong> hospitals is confirmation <strong>of</strong> <strong>the</strong> prolonged and strenuousnature <strong>of</strong> <strong>the</strong> labour.24

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