Warming IV Fluids and Incidence of Hypotension

Hakki Unlugenc

Status and phase

Completed

Phase 1

Conditions

Assault by Hot Fluids

Treatments

Other: Active Comparator: Warming group

Study type

Interventional

Funder types

Other

Identifiers

NCT02582112

HZLTNS98

Details and patient eligibility

About

This prospective, double-blinded, randomized, controlled study was undertaken to evaluate whether warming IV fluids (37 oC) resulted in lower incidence of hypotension, less ephedrine and transfusion requirement and lower fluid consumption than use of room-temperature fluids (22 oC) in cesarean delivery patients undergoing spinal anesthesia.

Full description

Inadvertent perioperative hypothermia during cesarean delivery is not rare and frequently neglected, despite the recommendations by clinical guidelines. Exposure to cold air and infusing non-warmed intravenous (iv) fluids are the other main sources of inadvertent hypothermia. Spinal anesthesia used during the cesarean delivery has also been demonstrated to impair normal autonomic thermoregulatory control and extend inadvertent perioperative hypothermia. Various measures such as pre-warming of patients or fluids before anesthesia, peroperative warming of iv fluids and active/passive cutaneous warming techniques have all been used to prevent or to reduce inadvertent perioperative hypothermia. This prospective, double-blinded, randomized, controlled study was undertaken to evaluate whether warming IV fluids (37 oC) resulted in lower incidence of hypotension, less ephedrine and transfusion requirement and lower fluid consumption than use of room-temperature fluids (22 oC) in cesarean delivery patients undergoing spinal anesthesia.

The hypothesis was that in elective caesarean delivery patients undergoing spinal anesthesia, warming intravenous fluids, would reduce the incidence of hypotension, ephedrine and transfusion requirement and volume consumption. Thus, the primary outcome measure of the present study was the incidence of intraoperative maternal hypotension and ephedrine requirement during spinal anaesthesia for caesarean section. Secondary outcome measures were total volume consumption, blood loss, pain scores, shivering and maternal and foetal side effects.

Enrollment

60 patients

Sex

Female

Ages

18 to 43 years old

Volunteers

No Healthy Volunteers

Inclusion criteria

Inclusion criteria were previous cesarean delivery and breech presentation.

Exclusion criteria

Exclusion criteria included parturients younger than 18 and older than 43 years, significant coexisting disease such as preeclampsia or eclampsia, thyroid disorders, neurological disorders, increased risk of intra-operative hemorrhage (such as placenta accreta), and any contraindication to regional anaesthesia such as bleeding disorders or local infection.