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Low risk of DVT after knee arthroscopy


Clinical Question:
What is the risk of deep vein thrombosis after knee arthroscopy?

Bottom Line:
In patients undergoing knee arthroscopy, approximately 6% will develop a deep vein thrombosis (DVT) or symptomatic pulmonary embolism (PE). If these data are translatable to other settings, thromboprophylaxis would appear to be unnecessary. (LOE = 1b-)

Hoppener MR, Ettema HB, Henny CP, Verheyen CC, Buller HR. Low incidence of deep vein thrombosis after knee arthroscopy without thromboprophylaxis: a prospective cohort study of 335 patients. Acta Orthopaedica 2006;77:767-771.  [PMID:17068708]

Study Design:
Cohort (prospective)

Outpatient (specialty)

These authors followed 355 consecutive patients undergoing outpatient knee arthroscopy. The patients didn't receive DVT prophylaxis. In addition to asking patients about symptoms suggesting DVT or PE, the researchers had patients undergo noninvasive testing for DVT 14 days after surgery. The authors don't report whether either of these were assessed in a blinded fashion. At the end of the 8-week follow-up period, the authors had data on 335 (94%) of the patients. They found 19 (5.7%; 95% CI, 3.5%-8.7%) DVTs on ultrasound, 2 of which appeared to be symptomatic. One patient, who did not have a DVT by ultrasound, developed a symptomatic, nonfatal PE. More than 80% of the DVTs were distal and all were detected within 2 weeks of surgery.

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Slawson, David C., et al., editors. "Low Risk of DVT After Knee Arthroscopy." EE+ POEM Archive, John Wiley & Sons, 2019. Evidence Central, evidence.unboundmedicine.com/evidence/view/infoPOEMs/426700/all/Low_risk_of_DVT_after_knee_arthroscopy.
Low risk of DVT after knee arthroscopy. In: Slawson DC, Shaughnessy AF, Ebell MH, et al, eds. EE+ POEM Archive. John Wiley & Sons; 2019. https://evidence.unboundmedicine.com/evidence/view/infoPOEMs/426700/all/Low_risk_of_DVT_after_knee_arthroscopy. Accessed May 24, 2019.
Low risk of DVT after knee arthroscopy. (2019). In Slawson, D. C., Shaughnessy, A. F., Ebell, M. H., & Barry, H. (Eds.), EE+ POEM Archive. Available from https://evidence.unboundmedicine.com/evidence/view/infoPOEMs/426700/all/Low_risk_of_DVT_after_knee_arthroscopy
Low Risk of DVT After Knee Arthroscopy [Internet]. In: Slawson DC, Shaughnessy AF, Ebell MH, Barry H, editors. EE+ POEM Archive. John Wiley & Sons; 2019. [cited 2019 May 24]. Available from: https://evidence.unboundmedicine.com/evidence/view/infoPOEMs/426700/all/Low_risk_of_DVT_after_knee_arthroscopy.
* Article titles in AMA citation format should be in sentence-case
TY - ELEC T1 - Low risk of DVT after knee arthroscopy ID - 426700 ED - Slawson,David C, ED - Shaughnessy,Allen F, ED - Ebell,Mark H, ED - Barry,Henry, BT - EE+ POEM Archive UR - https://evidence.unboundmedicine.com/evidence/view/infoPOEMs/426700/all/Low_risk_of_DVT_after_knee_arthroscopy PB - John Wiley & Sons DB - Evidence Central DP - Unbound Medicine ER -