Algorithm for patient selection for outpatient total joint procedures. BMI, Body mass index; CAD, coronary artery disease; CHF, congestive heart failure; COPD, chronic obstructive pulmonary disease; DVT, deep vein thrombosis; HTN, hypertension; ICD, implantable cardiac defibrillator; OSA, obstructive sleep apnea; PE, pulmonary embolism; PTCA, percutaneous transluminal coronary angioplasty; TJA, total joint arthroplasty.