Sujata 2012.

Study characteristics
Methods	RCT
Participants	100 women Inclusion criteria: ASA I‐II, elective CS under SAB Exclusion criteria: contraindication to SAB, peripartum bleeding > 1 L, multiple gestation, polyhydramnios, gestation < 37 weeks, any patient considered at high risk of DVT Setting: India
Interventions	Mechanical lower limb compression versus control Group 1: mechanical pump with thigh‐level cuff applied to lower limbs in all subjects and switched on Group 2: mechanical pump with thigh‐level cuff applied to lower limbs in all subjects but not switched on All women received standardised aspiration prophylaxis, standardised monitoring, standardised spinal anaesthetic technique and dose, standardised crystalloid coloading and maintenance, standardised positioning and standardised oxytocic administration. Hypotension was treated with IV ephedrine 6 mg, repeated every 3 min as needed.
Outcomes	Maternal: BP, heart rate, SpO2 recorded every 3 min for 1 h. Total volume of IV fluid given, total ephedrine dose Neonatal: Apgar scores
Notes	Hypotension defined as a decrease in SBP > 20% baseline
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Not reported
Allocation concealment (selection bias)	Unclear risk	Sealed envelope
Blinding of participants and personnel (performance bias) All outcomes	Low risk	Anaethetist caring for women during caesarean blinded. Possible that blinding may have been broken
Blinding of outcome assessment (detection bias) All outcomes	Low risk	As above
Incomplete outcome data (attrition bias) All outcomes	Low risk	Group 1 – 3 women excluded due to pregnancy‐induced hypertension Group 2 – 5 women excluded due to pregnancy‐induced hypertension
Selective reporting (reporting bias)	Low risk	Not apparent
Other bias	Low risk	Not apparent