Parkinsons disease
The reported prevalence of dysphagia in patients with Parkinsons disease ranges from 20% to 100% due to variations in the methods of assessing the swallowing function. Unlike some medical problems, such as stroke, dysphagia in Parkinsons Disease degenerates with disease progression. Aspiration pneumonia was the most common reason for the emergency admission of patients with Parkinsons Disease whose disease duration was >5 years and pneumonia was one of the main causes of death. Dementia
The familiar model of care for people with advanced dementia and dysphagia is the revolving door of recurrent chest infections, frequently associated with aspiration and related readmissions. Many individuals with dementia resist or are indifferent to food and fail to manage the food bolus. There are also many contributory factors such as poor oral hygiene, high dependency levels for being positioned and fed, as well as the need for oral suctioning. While tube feeding might therefore be considered a safer option, tube feeding has not been shown to be beneficial in people with advanced dementia. The preferred option therefore is to continue eating and drinking orally despite the risk of developing chest infections. See also
Dysphagia
Meconium aspiration syndrome
Nosocomial pneumonia
Chemical pneumonitis

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Cyanide poisoning is poisoning that results from exposure to any of a number of forms of cyanide. Early symptoms include headache, dizziness, fast heart rate, shortness of breath, and vomiting. This phase may then be followed by seizures, slow heart rate, low blood pressure, loss of consciousness, and cardiac arrest. Onset of symptoms usually occurs within a few minutes. Some survivors have long-term neurological problems.Toxic cyanide-containing compounds include hydrogen cyanide gas and a number of cyanide salts. Poisoning is relatively common following breathing in smoke from a house fire. Other potential routes of exposure include workplaces involved in metal polishing, certain insecticides, the medication sodium nitroprusside, and certain seeds such as those of apples and apricots. Liquid forms of cyanide can be absorbed through the skin. Cyanide ions interfere with cellular respiration, resulting in the bodys tissues being unable to use oxygen.Diagnosis is often difficult. It may be suspected in a person following a house fire who has a decreased level of consciousness, low blood pressure, or high lactic acid. Blood levels of cyanide can be measured but take time. Levels of 0.5–1 mg/L are mild, 1–2 mg/L are moderate, 2–3 mg/L are severe, and greater than 3 mg/L generally result in death.If exposure is suspected, the person should be removed from the source of exposure and decontaminated. Treatment involves supportive care and giving the person 100% oxygen. Hydroxocobalamin (vitamin B12a) appears to be useful as an antidote and is generally first-line. Sodium thiosulphate may also be given.