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To address ongoing controversy about whether Allen test results predict ischemic complications of transradial artery (TRA) catheterization, investigators conducted a prospective study in 203 patients with normal (83), intermediate (60), or abnormal (60) Allen test results before TRA procedures. All patients also underwent preprocedure plethysmography and pulse oximetry (Barbeau test); ulnar contrast angiography frame count for collateral assessment during catheterization; and thumb capillary lactate assessment and handgrip-strength testing immediately after catheterization, at 30 days, and at 1 year.
The primary endpoint — postprocedural concentration of thumb capillary lactate — did not differ among the groups either immediately after the p…