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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.