# Clinical Cases: Night Coverage and Cross-Coverage

## Case 1: Effective Sign-Out and Overnight Symptom Management

### Clinical Image
![Resident performing sign-out using I-PASS format](case_01_image.jpg)
*Source: [Wikimedia Commons - Medical Handoff](https://commons.wikimedia.org/wiki/Category:Medical_education) - CC BY-SA 4.0*

### Case Presentation
The medicine sub-intern receives sign-out at 6 PM for 18 patients. One patient is highlighted as a "watcher": Mr. Johnson, a 72-year-old with COPD admitted for pneumonia. The day team uses I-PASS format: Illness severity - "Watcher, he's improved but still on 3L O2"; Patient summary - "Day 3 of community-acquired pneumonia, on ceftriaxone and azithromycin, improving clinically"; Action list - "None tonight, continue antibiotics"; Situation awareness - "If his oxygen requirement increases, get a chest X-ray and page the senior. If he spikes a fever, get blood cultures and consider broadening antibiotics"; Synthesis - the sub-intern repeats back: "So he's improving but if O2 goes up or he fevers, I should get imaging and cultures and call you." At 2 AM, the nurse pages about Mr. Johnson: he is requesting something for sleep. The sub-intern reviews his sign-out and chart - no documented sleep aids, no contraindications. She goes to bedside (rather than ordering blindly) and finds him mildly anxious but vital signs stable. She tries non-pharmacologic measures first: ensures a quiet room, offers warm blanket. He still cannot sleep. She orders melatonin 3 mg PO (first-line, low risk). The nurse pages again at 4 AM - he is still awake. She assesses again; he is now more anxious, worried about his breathing. His O2 sat is 93% on 3L, unchanged. She provides reassurance and offers trazodone 25 mg PO for refractory insomnia. He falls asleep within an hour. She documents a brief cross-cover note describing the events and interventions.

### Key Learning Points
- I-PASS sign-out structure: Illness severity, Patient summary, Action list, Situation awareness (if-then guidance), Synthesis (receiver reads back)
- "Watchers" are patients at higher risk for deterioration who warrant closer attention and lower threshold for escalation
- Insomnia management: start with non-pharmacologic measures; if pharmacologic needed, melatonin is first-line, trazodone for refractory; avoid benzodiazepines in elderly
- Always assess the patient when possible rather than ordering blindly; symptoms like insomnia may reflect underlying problems (anxiety, dyspnea, pain)

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## Case 2: Recognizing and Escalating Deterioration

### Clinical Image
![Rapid response team at bedside managing deteriorating patient](case_02_image.jpg)
*Source: [Wikimedia Commons - Emergency Medicine](https://commons.wikimedia.org/wiki/Category:Resuscitation) - CC BY-SA 3.0*

### Case Presentation
At 11 PM, the sub-intern is paged about a patient with chest pain. Mrs. Garcia is a 65-year-old woman admitted 2 days ago for cellulitis, now reporting substernal pressure that started 30 minutes ago. The sub-intern immediately goes to the bedside and finds her diaphoretic and clutching her chest. Vital signs: HR 110, BP 95/60 (previously 130/80), RR 22, O2 sat 94% on room air. She recognizes this as a potential cardiac emergency. She applies high-flow oxygen, obtains IV access, and orders a STAT ECG while simultaneously paging the senior resident. The ECG shows ST elevations in leads V2-V5, consistent with anterior STEMI. The senior arrives within minutes, confirms the findings, and activates the STEMI protocol. The patient receives aspirin 324 mg chewed, heparin bolus, and is taken emergently to the cath lab. She is found to have a 100% LAD occlusion requiring PCI. The sub-intern later reflects on the case: her immediate bedside response, recognition of instability, parallel processing (treating while calling for help), and appropriate escalation prevented delay in definitive treatment. The patient does well and thanks her upon discharge.

### Key Learning Points
- Rapid response triggers that warrant immediate escalation: respiratory rate greater than 30, oxygen saturation less than 90%, heart rate greater than 130 or less than 40, systolic BP less than 90, acute mental status change, or staff concern
- For chest pain, get an ECG within 10 minutes; treat first, diagnose second when a patient is unstable
- Parallel processing: perform initial interventions (oxygen, IV, monitoring) while simultaneously calling for help; don't wait
- When in doubt, escalate early; it is always better to call for help that turns out to be unnecessary than to delay calling when it was needed

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## Case 3: Overnight Decision-Making and Documentation

### Clinical Image
![Physician writing cross-cover documentation note](case_03_image.jpg)
*Source: [Wikimedia Commons - Medical Records](https://commons.wikimedia.org/wiki/Category:Medical_records) - CC BY-SA 4.0*

### Case Presentation
At 3 AM, the sub-intern is paged about Mr. Williams, an 80-year-old with metastatic prostate cancer admitted for pain management. The nurse reports he is acutely confused and trying to get out of bed, which is new from his baseline. The sub-intern assesses him using a systematic approach. Vital signs: afebrile, HR 95, BP 140/85, O2 sat 96% on room air. Glucose is 145 (normal). She reviews medications: he received scheduled oxycodone 10 mg at midnight. Physical exam reveals urinary retention with 600 mL on bladder scan. She places a Foley catheter with immediate relief of 700 mL of urine. His confusion improves over the next hour. She considers the differential for acute delirium: the most likely cause is urinary retention (common cause, especially in elderly men on opioids), but she also checks for other reversible causes (infection, hypoxia, metabolic). She decides NOT to start an extensive overnight workup for his confusion given clear precipitant. She documents a cross-cover note: "Event: Acute confusion at 0300. Assessment: Found to have urinary retention (700 mL post-void residual) on bladder scan. Intervention: Foley catheter placed with immediate output of 700 mL. Response: Confusion improving at 0400 reassessment. Plan: Continue Foley, recommend AM urology consult and medication review given urinary retention likely exacerbated by opioids. Primary team aware via sign-out note." At sign-out in the morning, she provides a complete handoff of the overnight event.

### Key Learning Points
- Acute confusion/delirium requires evaluation for reversible causes: medications (opioids, anticholinergics, benzodiazepines), infection (UTI, pneumonia), metabolic (glucose, sodium), hypoxia, urinary retention, constipation
- Cross-cover decision-making prioritizes safety and reversible interventions; defer complex workups or irreversible decisions to the primary team
- Cross-cover note elements: Event (what happened), Assessment (findings), Intervention (what was done), Response (how patient responded), Plan (follow-up needed)
- Thorough sign-out documentation ensures continuity; the day team should know exactly what happened overnight