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Letter
Author's response to ‘Valsalva manoeuvre using a syringe: physics and implications’
  1. Hilary Sarah Thornton1,
  2. Mohammed H Elwan2,
  3. Joseph A Reynolds3,
  4. Timothy J Coats1
  1. 1 Emergency Medicine Academic Group, Department of Cardiovascular Sciences, University of Leicester, Leicester, UK
  2. 2 Faculty of Medicine, Department of Emergency Medicine, Alexandria University, Alexandria, Egypt
  3. 3 Leicester University Medical School, Leicester, UK
  1. Correspondence to Dr Hilary Sarah Thornton, Emergency Medicine Academic Group, Department of Cardiovascular Sciences, University of Leicester, Level G Jarvis Building RMO, Infirmary Square, Leicester LE1 5WW, UK; hy8hst{at}hyms.ac.uk

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We were very interested in the physics explained in Leszek Pstras' letter,1 especially the influence of time on friction forces, a factor that we had not considered. In our experiment,2 …

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Footnotes

  • Twitter Follow Mohammed Elwan at @drmhuss

  • Contributors All authors have discussed the issues, contributed to the writing of the letter and approved the final submission.

  • Competing interests None declared.

  • Provenance and peer review Not commissioned; internally peer reviewed.

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