Perioperative medicine & outcomes

Perioperative trends in neck and leg fluid volume in surgical patients: a prospective observational proof-of-concept study

Can J AnaesthPublished Prospective observational cohort study

Authors' conclusion

This proof-of-concept study showed the feasibility and variability of segmental fluid volumes in the perioperative period using BIA.

Study context

Population
Adults undergoing elective inpatient noncardiac surgery under GA20/35 females
Participants
35 adults
Outcome
Feasibility of bioelectrical impedance analysis (BIA) (recruitment, protocol adherence) and trend of segmental fluid volumes (NFV, NFV phase angle, LFV)
Follow-up
Preop, PACU, 10 pm night after surgery (N 0), 10 am POD 1
Methodological detailsproof-of-concept
  • Proof-of-concept

Main finding

As reported in the abstract

Feasibility and segmental fluid volume trends

Recruitment

50 of 66

76%

Protocol adherence: fluid measurements

34/39, 87%

Protocol adherence: preoperative sleep study

35/39, 90%

Observational data: associations, not effects.

Further findings

Predictors of overall NFV changes (linear regression)

Associated with preop apnea-hypopnea index (AHI), body mass index (BMI) and opioids after adjusting for body position and pneumoperitoneum

Original publication

Perioperative trends in neck and leg fluid volume in surgical patients: a prospective observational proof-of-concept study. Can J Anaesth. Published 30 November 2022. doi:10.1007/s12630-022-02362-6

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