title: Blood loss predictive factors and transfusion practice during percutaneous nephrolithotomy of kidney stones: a prospective study.
abstract: Objectives Bleeding is the most common complication of percutaneous nephrolithotomy (PCNL). Injudicious transfusion is frequently performed in current practice, even though it is not always needed. This study aimed to identify the predictive factors of blood loss in the PCNL procedure and evaluate the perioperative transfusion practice. Methods A prospective study of PCNL was randomly performed by two consultants of endo-urology at our institution. The inclusion criteria were adults with kidney pelvic stones >20 mm or stone in inferior calyx >10 mm or staghorn stone. Those with coagulopathy, under anti-coagulant treatment or open conversion were excluded. A full blood count was taken at baseline and during 12, 24, 36, 72-hours post-operatively. Factors such as stone burden, sex, body surface area, shifting of hematocrit level and amount of blood transfused were analyzed statistically using line regression to identify the predictive factors of total blood loss (TBL).   Results Eighty-five patients were enrolled in this study. Mean TBL was 560.92 ± 428.43 mL for both endo-urology surgeons. Stone burden was the most influential factor for TBL (p=0.037). Our results revealed that TBL (mL) = -153.379 + 0.229 × stone burden (mm2) + 0.203 x baseline serum hematocrit (%); thus considerably predicted the need for blood transfusion. A total of 87.1% patients did not receive perioperative transfusion, 3.5% received intra-operative transfusion, 7.1% received post-operative transfusion, 23% had both intra and post-operative transfusion, resulting in a cross-matched transfusion ratio of 7.72. Mean perioperative blood transfused was 356.00 ± 145.88 mL.
authors.affiliation: Department of Urology, Cipto Mangunkusumo Hospital / Faculty of Medicine, Universitas Indonesia, Jakarta, 10430, Indonesia.
authors.forename: Firtantyo Adi
authors.initials: FA
authors.lastname: Syahputra
authors.affiliation: Department of Urology, Cipto Mangunkusumo Hospital / Faculty of Medicine, Universitas Indonesia, Jakarta, 10430, Indonesia.
authors.forename: Ponco
authors.initials: P
authors.lastname: Birowo
authors.affiliation: Department of Urology, Cipto Mangunkusumo Hospital / Faculty of Medicine, Universitas Indonesia, Jakarta, 10430, Indonesia.
authors.forename: Nur
authors.initials: N
authors.lastname: Rasyid
authors.affiliation: Department of Urology, Cipto Mangunkusumo Hospital / Faculty of Medicine, Universitas Indonesia, Jakarta, 10430, Indonesia.
authors.forename: Faisal Abdi
authors.initials: FA
authors.lastname: Matondang
authors.affiliation: Department of Urology, Cipto Mangunkusumo Hospital / Faculty of Medicine, Universitas Indonesia, Jakarta, 10430, Indonesia.
authors.forename: Endrika
authors.initials: E
authors.lastname: Noviandrini
authors.affiliation: Department of Urology, Cipto Mangunkusumo Hospital / Faculty of Medicine, Universitas Indonesia, Jakarta, 10430, Indonesia.
authors.forename: Maruto Harjanggi
authors.initials: MH
authors.lastname: Huseini
keywords: Bleeding; PCNL; nephrolithiasis; transfusion