NCBI ROFL: Sword swallowing and its side effects.

By ncbi rofl | May 28, 2010 7:00 pm

spacing is important Fig 1: One of the authors (DM)
swallowing seven swords.

It’s BMJ week (again) on NCBI ROFL! After the success of our first BMJ week, we decided to devote another week to fun articles from holiday issues of the British Medical Journal. Enjoy!

“OBJECTIVE: To evaluate information on the practice and associated ill effects of sword swallowing. DESIGN: Letters sent to sword swallowers requesting information on technique and complications. SETTING: Membership lists of the Sword Swallowers’ Association International. PARTICIPANTS: 110 sword swallowers from 16 countries. RESULTS: We had information from 46 sword swallowers. Major complications are more likely when the swallower is distracted or swallows multiple or unusual swords or when previous injury is present. Perforations mainly involve the oesophagus and usually have a good prognosis. Sore throats are common, particularly while the skill is being learnt or when performances are too frequent. Major gastrointestinal bleeding sometimes occurs, and occasional chest pains tend to be treated without medical advice. Sword swallowers without healthcare coverage expose themselves to financial as well as physical risk. CONCLUSIONS: Sword swallowers run a higher risk of injury when they are distracted or adding embellishments to their performance, but injured performers have a better prognosis than patients who suffer iatrogenic perforation.”

sword_swallowing

Bonus quote from the full length article:

“Some respondents swallowed a sword easily, but mastery for most required daily practice over months or years. The gag reflex is desensitised, sometimes by repeatedly putting fingers down the throat, but other objects are used including spoons, paint brushes, knitting needles, and plastic tubes before the swallower commonly progresses to a bent wire coat hanger. The performer must then learn to align a sword with the upper oesophageal sphincter with the neck hyper-extended. The next step requires relaxation of the pharynx and oesophagus and particularly the horizontal fibres of cricopharyngeus, which are not usually under voluntary control. Devgan et al have shown that one swallower was able to reduce voluntarily the resting pressure of this sphincter by 10-20 mm Hg. This swallower described having to “relax the muscles of his neck,” and several swallowers mentioned not being able to perform when they could not “relax” or the throat “closing up” when sore. Huizinga described a swallower who “sucked in” the sword, and a lateral radiograph in Huizinga’s paper shows the pharynx filled with air, but preliminary air swallowing is not invariable. Force must not be used and the clean sword is usually lubricated at least with saliva. One performer used butter, and one had to retire because of a dry mouth caused by medication.

Once the swallower has got the sword past the cricopharyngeal sphincter and relaxed the oesophagus, he or she must learn to control retching so the sword can be passed down to the cardia. The cardia lies about 40 cm from the teeth and the sword straightens the flexible and distensible oesophagus. Further progress depends not only on the swallower learning to relax the lower oesophageal sphincter and controlling retching but also on the shape of the stomach. The angle of the gastro-oesophageal junction and lesser curve vary, being obtuse in the vertically oriented stomach, particularly when it is full, and more acute in the high horizontal stomach often present in thickset individuals (fig 2). A 220 cm giant is said to hold the record for the longest swallowed sword (82.5 cm) and body build should have a bearing on what length of sword can pass. Nevertheless, we did not find any correlation between the longest sword an individual could swallow and their size, suggesting other factors are important.”

Image: BMJ

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CATEGORIZED UNDER: BMJ week, NCBI ROFL, super powers
  • BillWhite36

    And then, of course, there’s Linda Lovelace!

  • http://www.swordswallow.org Dan Meyer

    Thanks for publishing this!

    Great to see your review of the article! Well done!

    Let me know if you’d like to post some x-rays or flueroscope videos of sword swallowers, and I’ll be glad to provide you some files or links.

    Stay sharp and keep it real!

    Have a knife day

    Dan Meyer
    President
    Sword Swallowers Association Int’l

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NCBI ROFL is the brainchild of two Molecular and Cell Biology graduate students at UC Berkeley and features real research articles from the PubMed database (which is housed by the National Center for Biotechnology information, aka NCBI) that they find amusing (ROFL is a commonly-used internet acronym for "rolling on the floor, laughing"). Follow us on twitter: @ncbirofl

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