We are placing midline catheters for vancomycin infusion in the hospital setting, outpatient use, and in patients that get transferred to skilled nursing facilities for infusion. Certain of the physicians fight us on this, despite presentation of our evidence (INS standards, evidence-based theory, experience) that a PICC is preferable. We are uncertain the dwell time of the midlines in patients who leave the hospital with these lines in place, probably upwards of a month. One physician routinely orders midline catheters for 2 weeks duration of vancomycin. Our hospital policy follows INS standards and states midlines should not be used for pH <5 or pH >9. We brought our dilemma to the attention of the hospital administration, showed our evidence, and they chose to support the physician wishes on the use of midline catheters for vancomycin. We are to continue placing midlines for vancomycin infusion. They are removing the "pH" information in the policy for midline use. Are we still liable if damages occur to the patient? Should we inform the patient of increased risk of vancomycin when we obtain consent for line placement? Any advice?