8.4 Respiratory Symptoms: Dyspnea, Cough, and Secretions
Key Takeaways
- Dyspnea is a subjective symptom; respiratory rate and oxygen saturation do not define it.
- Oxygen helps hypoxic patients more than non-hypoxic patients; a fan toward the face is useful whether or not hypoxia is present.
- Low-dose morphine or hydromorphone is first-line pharmacologic therapy for hospice dyspnea; a benzodiazepine treats the anxiety component and is not monotherapy for air hunger.
- Cough treatment includes cause-directed care, benzonatate, opioids, and limited use of guaifenesin when the patient can still expectorate.
- Death rattle is pooled secretions, not choking; reposition, teach the family, consider glycopyrrolate for less central-nervous-system effect, and do not deep suction routinely.
Dyspnea is what the patient says it is
Dyspnea is the subjective experience of air hunger or uncomfortably difficult breathing. Tachypnea, accessory-muscle use, and a low saturation are signs. An unconscious dying patient can have a fast or noisy respiratory pattern without dyspnea. A fully alert patient can have terrible air hunger with a saturation of 94%. CHPN will ding answers that treat the pulse-oximeter number instead of the report, and answers that refuse opioids because "the saturation looks fine."
Nonpharmacologic measures are not optional extras. Sit the patient upright or leaning forward (tripod). Open a window. Aim a fan toward the face; trigeminal airflow reduces the sensation of dyspnea in many patients. Pacing, energy conservation, and a calm presence lower the panic loop. Oxygen helps people who are hypoxemic more than people who are not. If a mask causes claustrophobia that worsens air hunger, a nasal cannula or no oxygen plus a fan is kinder. Do not force a non-rebreather as a ritual on a non-hypoxic, terrified patient.
Low-dose opioid is first-line pharmacology
For hospice and palliative dyspnea, a low-dose opioid—morphine or hydromorphone—is first-line pharmacologic therapy. The mechanism is reduced ventilatory drive and reduced perception of air hunger, not "knocking them out." In an opioid-naive adult, that means a small oral or subcutaneous dose, then reassessment. In a patient already on an opioid for pain, a dyspnea rescue is typically a fraction of the four-hour equivalent, or a modest increase in the scheduled dose, per the team's protocol. Hydromorphone is a reasonable alternative when morphine is not tolerated; renal failure still requires caution with either drug and specialist input when rotating.
Benzodiazepines treat the anxiety component of breathlessness. They are not monotherapy for air hunger. Pair lorazepam or a similar agent with an opioid when panic is prominent, not instead of the opioid. Exam trap: a stem that offers only a benzodiazepine for a gasping, opioid-naive patient is incomplete.
Treat reversible drivers when they still matter: bronchospasm with a bronchodilator, volume overload with a diuretic if the kidneys respond, anemia if transfusion matches goals, pneumonia if antibiotics still serve comfort. Then return to the opioid-plus-fan core. Safety teaching for families: opioids used this way for dyspnea, at hospice doses, are aimed at comfort; the dying process—not a properly titrated opioid—is what stops breathing at the end of life. Document the indication as dyspnea, not only as pain.
Cough
Cough deserves a cause check: postnasal drip, angiotensin-converting-enzyme inhibitor, aspiration, infection, reflux, or tumor in the airway. Benzonatate is a peripherally acting antitussive useful for dry, hacking cough. Opioids suppress the cough reflex and do double duty when dyspnea coexists. Guaifenesin is an expectorant with limited value in frail dying patients who cannot generate an effective cough; it may only create more wet noise. If the patient can still expectorate and a productive cough is the complaint, a trial is reasonable. Do not deep-suction a dying airway to "get the phlegm out" because an expectorant disappointed the family.
Death rattle (terminal secretions)
In the last hours, swallow fails and saliva pools in the oropharynx. The sound is called death rattle or terminal secretions. It is not choking and not drowning. The unresponsive patient is usually not suffering from the sound; families suffer. The first interventions are repositioning (semi-prone or head turned, head of bed up) and a clear explanation. Gentle mouth care is enough. Do not deep suction routinely. Suction stimulates more secretions, gagging, and distress.
If an anticholinergic is added after positioning and teaching:
| Agent | Central-nervous-system note | Practical hospice use |
|---|---|---|
| Glycopyrrolate | Quaternary amine; less central-nervous-system penetration, less delirium | Preferred when the patient might still be aware or is delirium-prone |
| Atropine ophthalmic drops given sublingually | Anticholinergic; more central effect than glycopyrrolate | Common in home kits; watch for delirium |
| Hyoscyamine | Crosses into the central nervous system | Oral or sublingual option |
| Scopolamine patch | Strong central effect; more delirium and sedation | Convenient patch; avoid in awake delirious patients when another agent will do |
Anticholinergics dry the mouth and can thicken secretions. They work better if started before a large pool has formed; they do not vacuum what is already there. That is another reason positioning and family teaching come first.
Treatment ladder
| Step | Dyspnea | Cough | Terminal secretions |
|---|---|---|---|
| 1. Assess | Patient report, not the saturation alone; look for hypoxia, bronchospasm, fluid, anxiety | Cause: drug, drip, aspiration, tumor | Is the patient unresponsive? Is the family the one in distress? |
| 2. Nonpharmacologic | Upright or tripod position, fan, pacing, calm presence; oxygen if hypoxic and tolerated | Humidification, sip precautions if aspirating | Reposition; explain this is not choking |
| 3. First-line drug | Low-dose morphine or hydromorphone | Benzonatate and/or opioid; guaifenesin only if cough is productive and effective | Anticholinergic if needed after teaching: prefer glycopyrrolate when delirium is a concern |
| 4. Add-on | Benzodiazepine for anxiety, not as the only dyspnea drug | Treat the cause (stop an offending antihypertensive, treat reflux) | Atropine drops, hyoscyamine, or scopolamine patch with eyes open to delirium risk |
| 5. Avoid | Forced oxygen masks that worsen panic; benzodiazepine monotherapy | Routine deep suction; expectorants in a patient who cannot cough | Routine deep suction; arguing that the sound means the patient is drowning |
A worked CHPN pattern: opioid-naive patient with air hunger, saturation 94% on room air, fan already in use. Give a low-dose opioid. Do not start with a scopolamine patch. Do not apply a tight oxygen mask as the primary treatment. If later the same patient becomes unresponsive with noisy secretions, switch the playbook: reposition, teach, then glycopyrrolate—not more deep suction, and not a lecture about hypoxia that the family will hear as "we starved them of air."
An opioid-naive hospice patient reports severe air hunger. Oxygen saturation is 94% on room air. A fan helps only a little. What is first-line pharmacologic therapy for dyspnea?
Family members are distressed by noisy oropharyngeal secretions in an unresponsive dying patient. What is the best first teaching and action?
Which anticholinergic used for terminal secretions is least likely to worsen delirium because it has less central-nervous-system penetration?