title: Predictors of fluid intravasation during operative hysteroscopy: a preplanned prospective observational study with 200 cases.
abstract: OBJECTIVE
  To verify the predictors of intravasation rate during hysteroscopy.
  
  
  METHODS
  Prospective observational study (Canadian Task Force classification II(-1)). All cases (n=200 women; 22 to 86 years old) were treated in an operating room setting. Considering respective bag overfill to calculate water balance, we tested two multiple linear regression models: one for total intravasation (mL) and the other for absorption rate (mL.min(-1)). The predictors tested (independent variables) were energy (mono/bipolar), tube patency (with/without tubal ligation), hysterometry (cm), age ≤ 50 years, body surface area (m(2)), surgical complexity (with/without myomectomy) and duration (min).
  
  
  RESULTS
  Mean intravasation was significantly higher when myomectomy was performed (442 ± 616 versus 223 ± 332 mL; p<0.01). In the proposed multiple linear regression models for total intravasation (adjusted R(2)=0.44; p<0.01), the only significant predictors were myomectomy and duration (p<0.01).In the proposed model for intravasation rate (R(2)=0.39; p<0.01), only myomectomy and hysterometry were significant predictors (p=0.02 and p<0.01, respectively).
  
  
  CONCLUSIONS
  Not only myomectomy but also hysterometry were significant predictors of intravasation rate during operative hysteroscopy.
authors.affiliation: Instituto Nacional de Saúde da Mulher, da Criança e do Adolescente Fernandes Figueira, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil.
authors.forename: Márlon de Freitas
authors.initials: Mde F
authors.lastname: Fonseca
authors.affiliation: Centro de Vídeo-endoscopia São Paulo, Rio de Janeiro, RJ, Brazil.
authors.forename: Claudio Moura
authors.initials: CM
authors.lastname: Andrade Junior
authors.affiliation: Hospital Central da Polícia Militar, Rio de Janeiro, RJ, Brazil.
authors.forename: Eduardo de Almeida
authors.initials: Ede A
authors.lastname: Nogueira
authors.affiliation: Instituto Nacional de Saúde da Mulher, da Criança e do Adolescente Fernandes Figueira, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil.
authors.forename: Felipe Ventura
authors.initials: FV
authors.lastname: Sessa
authors.affiliation: Centro de Vídeo-endoscopia São Paulo, Rio de Janeiro, RJ, Brazil.
authors.forename: Claudio Peixoto
authors.initials: CP
authors.lastname: Crispi
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D015907:Hysteroscopy / Q000379:methods*; D007431:Intraoperative Complications / Q000209:etiology*; D008875:Middle Aged; D011446:Prospective Studies; D007507:Therapeutic Irrigation / Q000009:adverse effects*; D055815:Young Adult