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Table 2 Perioperative characteristics

From: Ability of the integrated pulmonary index to predict impending respiratory events in the early postoperative period

ASA class (n, %)

 I

11

3.1%

 II

104

29.1%

 III

231

64.5%

 IV

12

3.4%

Surgery duration (min, mean SD)

197.2

104.5

Type of procedure (n, %)

 Craniotomy

55

15.4%

 Hip fracture repair

4

1.1%

 Open upper abdominal

152

42.5%

 Vascular

10

2.8%

 Posterior spinal fusion

137

38.3%

General anesthesia used (n, %)

358

100%

Regional anesthesia used (n, %)

14

3.9%

 Spinal or epidural

10

2.8%

 PNB or catheter

4

1.1%

Intraoperative transfusion (n, %)

63

17.6%

 Cell saver

38

10.6%

 RBC

22

6.1%

 FFP

2

0.6%

 Platelets

2

0.6%

 Autologous blood

3

0.8%

 Cryoprecipitate

0

0.0%

Intraoperative fluids

 Crystalloids (median, IQR)

1754

1100, 2700

 Albumin (n = 61) (mean, SD)

284.43

211.25

 Hetastarch (n = 5) (mean, SD)

450

111.8

Urine output (mean, SD)

453.91

483.7

Intraoperative medications (n, %)

 Opioids (IV)

358

100.0%

  Fentanyl

356

99.4%

  Morphine

4

1.1%

  Hydromorphone

162

45.3%

  Remifentanil

55

15.4%

  Sufentanil

1

0.3%

 Neuromuscular blocker

347

96.9%

 Reversal

330

92.2%

  Sugammadex

302

84.4%

  Neostigmine

29

8.1%

Extubated in operating room (n, %)

357

99.7%

ICU admission (n, %)

51

14.2%

Discharge ASU or HOME (n, %)

45

12.6%

Death/in-hospital mortality within 30 days (n, %)

0

0.0%

Postoperative length of stay (mean, SD)

4.03

4.55

Time in PACU (median, IQR)

258

(157, 416)

Time from PACU entry to monitor start (min, mean, SD)

14.3

10.5

Capnostream monitor duration (min, median, IQR)a

120

117, 120

  1. ASA American Society of Anesthesiologists, PNB peripheral nerve block, RBC red blood cells, FFP fresh frozen plasma, ICU intensive care unit, ASU ambulatory surgical unit, PACU post-anesthesia care unit
  2. aMedian time monitored was 120 min (IQR 117, 120); 91 (25.4%) patients had less than 120 min of monitoring, but only 22 (6.1%) patients had less than 60 min of monitoring time