The Mask That Closes In: Anxiety vs. an Airway Problem in Week 2 of Head-and-Neck RT
Ms. R, 67, has T3N2b base-of-tongue carcinoma and is receiving 70 Gy/35 fractions with concurrent cisplatin. She completed 8 fractions but today arrives tearful and diaphoretic. Blood pressure is 172/94 mmHg (baseline 128/78), pulse 104, SpO2 97% on room air. She says the thermoplastic mask "closes in" on her and she cannot get air; last week she needed a 20-minute break mid-treatment. Her daughter reports she has not slept in two nights and has stopped eating. The mask, made in week 0, now sits about 2 mm off her chin. The schedule is fully booked and the radiation oncologist is in clinic seeing other patients.
1. Before deciding whether Ms. R can be treated today, what must you assess, and who must be involved? How do you separate claustrophobia from a medical problem?
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Do not treat and do not sedate yet. A resting tachycardia and a 44 mmHg systolic rise above baseline are not a clean picture of simple anxiety. In a base-of-tongue patient on cisplatin, the differential includes dehydration/acute kidney injury, mucositis pain, hypoglycemia, anemia, sepsis (check ANC and temperature), and airway compromise from tumor or edema. Assess first: temperature, glucose, hydration and oral intake, pain score, presence of stridor or voice change, ability to lie flat with the mask on but not locked, and whether she can breathe through her nose with her mouth closed. Anxiety is a diagnosis of exclusion.
Escalate to the radiation oncologist before the fraction - the RO, not the therapist or nurse, owns the decision to treat, to treat with premedication, or to hold. Also verify the mask fit: a mask sitting 2 mm off the chin after 8 fractions suggests weight loss, and a loose mask is both a setup error and a panic trigger. If true airway compromise or inability to lie flat is found, the RO may need ENT/anesthesia involvement rather than anxiolytics.
2. If the team decides to treat with premedication, what conditions must be met for safe delivery?
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Conditions, not just "give Ativan":
- A written order from the RO specifying drug, dose, route, and timing (typically 30–60 minutes pre-treatment so peak effect coincides with setup).
- An airway and sedation assessment before the drug: she must be able to protect her airway and lie flat; concurrent cisplatin-induced nausea/vomiting and any opioids must be factored in.
- Monitoring and staffing: continuous visual/audio observation, SpO2 and BP before and after, a nurse available, and emergency equipment nearby. A patient under sedation should never be left alone in the vault.
- Discharge safety: no driving, an escort, and written instructions. Her daughter is present - use her.
- Efficiency: shorten mask time (music, warm blanket, hand to hold, mask released immediately after the last beam), and treat at a fixed daily time so the premedication schedule is reproducible.
Document the event, the intervention, and her response - this becomes the template for subsequent fractions.
3. What plan should be put in place now to prevent this from recurring over the remaining 27 fractions?
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Treat today's crisis and the next four weeks separately. Short term: a new mask (the loose fit indicates anatomy change and is a setup risk independent of anxiety), a longer appointment slot, the same therapists each day, and a stepped desensitization plan - practice at home with the mold, then progressively longer periods in the mask without treatment. Consider a mask modification (a cut-out around the nose/mouth of the thermoplastic) if the RO and dosimetrist confirm it does not compromise immobilization, since many patients' panic is airflow-related.
Also address the drivers: nutrition and dietitian referral for intake and weight, social work/psychology for sleep and distress, and pain control. Keep the RO informed so premedication does not silently become daily. Review at the weekly on-treatment visit. Missing fractions in a 35-fraction concurrent chemoradiation course has biologic cost, so the goal is reliable daily treatment, not repeated rescue.