... illness in children and adults 2nd ed Bloomington, MN: Institute for Clinical Systems Improvement, 2008: 1–72 27 Desrosiers M, Evans GA, Keith PK, et al Canadian clinical practice guidelines for acute ... is inadequate in differentiating bacterial from viral acute rhinosinusitis However, the utility of such clinical criteria for initiating empiric antimicrobial therapy in adults remains to be validated ... and pharmacodynamic endpoints in the antimicrobial treatment of ABRS, by inserting an indwelling catheter into the maxillary sinus This allowed serial sinus aspirate sampling IDSA Guideline for...