https://www.FauquierENT.net - There is a very rare condition called retrograde cricopharyngeus dysfunction (R-CPD) or "no burp syndrome" that prevents afflicted individuals from being able to burp no matter how much they want or need to. Formally described by Dr. Robert Bastian, this condition is anatomically described in this video as well as how botox is used to potentially cure this problem.
For more info on this condition:
Normal Swallow (0:10)
Normal Burping (0:33)
Symptoms of R-CPD (1:11)
R-CPD Treatment (1:29)
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The Long-term Efficacy of Botulinum Toxin Injection to Treat Retrograde Cricopharyngeus Dysfunction. Open . 2020 Jun 29;4(2):2473974X20938342. doi: 10.1177/2473974X20938342. eCollection Apr-Jun 2020.
Inability to Belch and Associated Symptoms Due to Retrograde Cricopharyngeus Dysfunction: Diagnosis and Treatment. OTO Open. 2019 Jan-Mar; 3(1): 2473974X19834553.
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