Acute reversible hand ischemia after radial artery cannulation

An 83-yr-old woman was scheduled for maxillectomy and free flap reconstruction for carcinoma. Her past medical history included hypertension, gastroesophageal reflux, and osteoarthritis. She was not taking any anti-platelet/anticoagulant agents and denied previous cerebrovascular and/or peripheral vascular disease. Uneventful (i.e., first-pass) cannulation (20G, 4.45 cm long Arrow® catheter with an integrated 0.46 mm diameter Seldinger guide wire; Teleflex Medical, Athlone, Ireland) of her right radial artery was performed using palpation under local infiltration of 1 mL plain lidocaine 2% using a 30G hypodermic needle. Five minutes later, she reported rapidly progressive right-hand paresthesia and exhibited painless pallor (Figure, panel A). Despite a normal pulse oximetry tracing (98%) on her right index finger, the arterial catheter was removed, resulting in rapid resolution of the symptoms and pallor (Figure, panels B-D). Subsequent ultrasound (US) examination of the 2-mm diameter artery showed no apparent sign of spasm, thrombosis, dissection, or surrounding hematoma. Surgery proceeded uneventfully with no postoperative issues noted regarding her hand circulation and/or the neurologic examination.

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A) Significant pallor of the right hand five minutes after right radial artery cannulation in a previously asymptomatic elderly patient scheduled for maxillectomy and free flap reconstruction for carcinoma. The pallor was accompanied by sudden onset, rapidly progressive painless paresthesia. B) The right hand two minutes, C) five minutes, and D) ten minutes after removing the radial arterial catheter following identification of the acute ischemia. Despite the apparent resolution of the acute radial artery occlusion, the fourth digit continued to show some evidence of persistent malperfusion with pallor (panels B and C).

Rarely, complications arise from radial arterial cannulation [only 21 (0.03%) complications after 62,626 arterial cannulations (94.5% radial)], including a pulseless extremity, occluded artery, and other vascular/neurologic findings.1 Female sex and use of clopidogrel are the only reported patient-related risk factors associated with post-insertion complications, although multiple cannulation attempts have also been implicated.1 Temporary arterial occlusion occurs in 19.7% of cases, with no evidence of long-term sequelae.2

Although palpation has traditionally been used to locate the radial artery, comparative studies have favoured US guidance (i.e., fewer attempts, less time to cannulation, better first-pass success) over palpation, thus potentially resulting in a better safety profile. Not surprisingly, patients with peripheral vascular disease benefited most from US guidance. Indeed, in a meta-analysis of seven comparative studies (n = 546), US guidance improved radial artery first-pass cannulation (relative risk 1.55; 95% confidence interval 1.02 to 2.53).3

Hence, routine utilization of US guidance may be associated with enhanced operating room efficiency and improved patient care. Furthermore, blood flow surrogates (e.g., pulse oximetry, Doppler, skin colour/temperature) should be routinely monitored distal to the insertion site – particularly when an arterial catheter is placed in patients unable to report signs/symptoms of ischemia (e.g., when comatose or anesthetized). Notably, the Allen test has low sensitivity for evaluating the collateral circulation4 and is not recommended.

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The authors declare no conflicts of interest.

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This submission was handled by Dr. Hilary P. Grocott, Editor-in-Chief, Canadian Journal of Anesthesia.

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Correspondence to Glenio B. Mizubuti MD, MSc.

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Leitch, J.K., Duggan, S., Ho, A.MH. et al. Acute reversible hand ischemia after radial artery cannulation. Can J Anesth/J Can Anesth 67, 377–378 (2020). https://doi.org/10.1007/s12630-019-01502-9

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