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Table 1 Patient demographics, type of anaesthesia and thromboprophylaxis regimen in relation to the surgical procedure

From: Symptomatic venous thromboembolism and mortality in orthopaedic surgery – an observational study of 45 968 consecutive procedures

 

Number of procedures

Median age

Female gender

Type of anaesthesia*

Thromboprophylaxis †

(n = 45968)

(25th–75th percentile)

- n (%)

Hip replacement

4001

77.2 (68–84)

2794 (69.8)

>90% spinal

Yes ‡

(all indications)

Knee replacement

1309

72.4 (64–78)

854 (65.2)

>90% spinal

Yes ‡

(all indications)

Spine surgery

1320

50.4 (38–67)

677 (51.3)

>90% general

Yes

(all indications)

Lower Limb Amputation

923

81.5 (74–87)

491 (53.2)

80-90% spinal

Yes

Pelvic and lower limb fractures

12739

78.7 (60–86)

8489 (66.6)

85-90% spinal

Yes

- IF (excl. foot fractures)

Anterior Cruciate Ligament reconstruction

659

28.6 (23–34)

240 (36.4)

80-90% general

Yes

Knee arthroscopy

6057

38.6 (29–51)

2469 (40.8)

70-80% general

No

Achilles tendon rupture

764

39.8 (33–48)

131 (17.1)

70% local

No

Foot surgery

2373

52.8 (39–65)

1508 (63.5)

40% local

No

Upper extremity surgery

8695

55.0 (39–71)

5061 (58.2)

70% general

No

Miscellaneous procedures in the lower limb

1322

51.3 (34–71)

608 (46.0)

50% spinal

Individual §

Minor surgery

5806

59.9 (41–77)

3073 (52.9)

50% general

No

  1. IF Internal fixation.
  2. * Only the most frequent anaesthetic method is specified.
  3. † Postoperative start with dalteparin 5000 U given subcutaneously once daily starting on the evening after surgery and continuing for 7 to 10 days.
  4. For fracture patients’ preoperative thromboprophylaxis was used as follows;
  5. Until March 31, 2000: dalteparin 5000 U subcutaneously at admission.
  6. From April 1, 2000: 1000 mL RingerDextran60® intravenously at admission.
  7. ‡ Graduated compression stockings were used as a postoperative complement to LMWH until 9th of February 2000.
  8. § Prophylaxis based on surgeons preference. In general, prophylaxis was given after major procedures in bone (such as osteotomies) while no prophylaxis was given after soft tissue surgery.