Hiccup

Hiccups are involuntary contractions of the diaphragm, the muscle that separates your chest from your abdomen and plays a crucial role in breathing. Each contraction is followed by a sudden closure of the vocal cords, producing the characteristic "hic" sound.

File:Hiccaway cup.jpg

Hiccaway cup

Etiology and Pathophysiology

• Hiccups can occur for a variety of reasons, often starting without any specific trigger. Short episodes of hiccups are commonly linked to specific lifestyle factors such as overeating, drinking carbonated beverages, consuming alcohol, sudden changes in stomach temperature, or emotional stress and excitement.
• More persistent hiccups may indicate an underlying health condition, such as gastroesophageal reflux disease (GERD), diabetes, stroke, or a central nervous system disorder. Other systemic conditions, including uremia, hypokalemia, and electrolyte imbalances, can also cause chronic hiccups.
• The pathophysiology of hiccups is attributed to an asynchronous contraction of the diaphragm on inspiration and the laryngeal closure on expiration. The precise mechanisms remain a subject of research, but they are likely associated with an interruption of the neuronal control of the diaphragm.

Clinical Presentation

• The main symptom of hiccups is a sudden, often repetitive, contraction of the diaphragm resulting in a distinctive 'hic' sound. This can occur with varying frequency and duration.
• When hiccups persist, they can cause fatigue, sleep disruption, and even psychological distress. If accompanied by other symptoms like abdominal pain, fever, or shortness of breath, it could indicate a more serious medical condition.

Diagnosis

Hiccups are usually self-diagnosable based on the distinctive symptoms. However, if hiccups persist, a thorough clinical examination may be necessary to identify any underlying causes. This can include blood tests, imaging studies, or endoscopic procedures, depending on the patient's other symptoms and medical history.

Treatment

• Hiccups often stop on their own without any treatment. Home remedies and behavioral techniques, such as holding the breath, drinking a glass of water, or pulling the knees to the chest, can sometimes help stop the contractions.
• For persistent or chronic hiccups that last more than 48 hours, medical treatments might be required. This can involve medications, such as chlorpromazine, metoclopramide, or baclofen. In very severe cases, surgical interventions or nerve blocks may be considered.

Prognosis

Most hiccups resolve spontaneously within a few minutes to a couple of hours. Persistent or chronic hiccups, although rare, can lead to complications such as fatigue, malnutrition, dehydration, and insomnia due to the constant interruption of normal activities. The prognosis in these cases largely depends on the underlying cause and the effectiveness of its treatment.

See Also

• Diaphragm (anatomy)
• Gastroesophageal reflux disease
• Hypokalemia

References

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• Lewis, JH. (1996). Hiccups: causes and cures. Journal of Clinical Gastroenterology, 22(4), 299-306.
• Chang, FY., & Lu, CL. (2012). Hiccup: mystery, nature and treatment. Journal of neurogastroenterology and motility, 18(2), 123-130.
• Friedgood, CE., & Ripstein, CB. (1955). Chlorpromazine (thorazine) in the treatment of intractable hiccups. Journal of the American Medical Association, 157(4), 309-310.

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