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Table 1 Patient characteristics, physiological variables and PHEA characteristics in adult trauma patients who underwent PHEA in the East of England, 2015–2020, n = 998

From: Predictors of post-intubation hypotension in trauma patients following prehospital emergency anaesthesia: a multi-centre observational study

Variable

Total n (%)

Sex/n (%)

 Male

753 (75.5%)

 Female

245 (24.5%)

Age group/n (%)

 16–34

328 (32.9%)

 35–54

298 (29.9%)

 55–74

254 (25.5%)

 75 +

118 (11.8%)

Estimated patient weight/kg, median [IQR]

80 [70–80]

GCS score/median [IQR]

7 [4–12]

Suspected injury pattern/n (%)

 Isolated head injury

510 (51.1%)

 Head injury + thorax/abdomen

354 (35.5%)

 No head injury

134 (13.4%)

Trauma type/n (%)

 Blunt

964 (96.6%)

 Penetrating

34 (3.4%)

Mechanism/n (%)

 Transport

562 (56.3%)

 Accidental Injury

313 (31.4%)

 Assault

50 (5.0%)

 Self-harm

42 (4.2%)

 Sport/leisure

31 (3.1%)

Shock index/median [IQR]

0.71 [0.55–0.95]

Pre-PHEA SBP/mmHg, n (%)

 Low < 90)

112 (11.2%)

 Mid (90–140)

491 (49.2%)

 High (> 140)

395 (39.6%)

Pre-PHEA HR/beats/min, n (%)

 Low (< 60)

84 (8.4%)

 Mid (60–100)

468 (46.9%)

 High (> 100)

434 (43.5%)

 NA

12 (1.2%)

Pre-PHEA RR/breaths/min, n (%)

 Low (< 10)

59 (5.9%)

 Mid (10–25)

458 (45.9%)

 High (> 25)

257 (25.8%)

 NA

224 (22.4%)

PHEA drug regime/n (%)

 3:2:1

303 (30.4%)

 1:1:1

238 (23.9%)

 0:1:1

214 (21.4%)

 Rocuronium only

44 (4.4%)

 Other

199 (19.9%)

Indication for PHEA/n (%)

 Reduced consciousness

435 (43.6%)

 Airway obstruction/compromise

204 (20.4%)

 Ventilatory failure

131 (13.1%)

 Agitated head injury

125 (12.5%)

 Anticipated clinical course

90 (9.0%)

 Other

13 (1.3%)

Arrival time to PHEA in minutes/median [IQR]

22 [16–30]

Pre-PHEA fluids/n (%)

 None

712 (71.3%)

 Fluids

286 (28.7%)

Vasopressor use/n (%)

 Not given

899 (90.1%)

 Pre RSI

6 (0.6%)

 Post RSI ≤ 10 min

21 (2.1%)

 Post RSI > 10 min

46 (4.6%)

 Post RSI-time unknown

26 (2.6%)

  1. The shock index was calculated as HR/SBP. ‘Arrival to PHEA’ is the time in minutes from the HEMS team arrival on scene until the time of PHEA. Pre-PHEA fluids are intravenous crystalloid administration by the ambulance service before arrival of HEMS
  2. PHEA prehospital emergency anaesthetic, GCS Glasgow Coma Scale, RSI rapid sequence induction, HR heart rate, SBP systolic blood pressure, RR respiratory rate, NA data not available