For the same tool crib (Poisson arrivals at 24 per hour, one attendant, exponential service averaging 2 minutes), what is the average time a mechanic spends at the crib, W? Answer in minutes.

An unconscious patient with advanced cancer has a valid, applicable advance directive declining mechanical ventilation in the current circumstances. The patient’s spouse demands intubation, stating, “I know what the document says, but I cannot let my spouse die!” The provider hesitates because the family is distressed. What should the charge nurse do? 

A nurse manager is coordinating holiday staffing assignments. Two nurses disagree over who should work Christmas Day. Nurse A has worked the holiday for the previous 3 years and requests Christmas off. Nurse B has a previously approved request for Christmas off and is unwilling to change those plans. The manager reviews staffing needs and discovers that another qualified nurse has offered to work Christmas in exchange for New Year’s Day off. After discussing the proposal with all affected nurses, the manager develops a schedule that satisfies staffing requirements and the nurses’ scheduling preferences. Which conflict management strategy is best demonstrated? 

A nurse manager and a staff nurse are negotiating changes to the weekend staffing schedule. The nurse manager recognizes that the staff nurse is strongly advocating for fewer weekend shifts but suspects that the request reflects a broader concern about unequal treatment of part-time employees. Which action by the manager is most likely to improve the effectiveness of the negotiation? 

Over 3 consecutive years, an RN receives nearly identical performance appraisal ratings despite clear evidence of significant improvement in communication and patient education. The manager explains that previous evaluation scores provide a reliable baseline and should rarely change. Which appraisal error is most evident? 

An RN has repeatedly arrived late for scheduled shifts. The manager previously met privately with the RN, discussed the concern, and provided suggestions for improvement. The tardiness continues. According to the progressive discipline process presented in the module, which action should the manager take next? 

Which cardiovascular association should be recognized in a patient with Marfan syndrome?

A patient with HFrEF develops weight gain, orthopnea, and crackles. After loop diuretic therapy, weight decreases and breathing improves, but ejection fraction remains 30%. Which change best explains the improvement?

A patient with HF has elevated JVP, dependent edema, and hepatic congestion. Which physiologic change best links these findings?

A 29-year-old has repeated LDL-C values above 230 mg/dL and a parent with premature coronary disease. Familial hypercholesterolemia is suspected. Which mechanism commonly underlies this inherited pattern?