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… and below the level of the patient

BMJ 1994; 309 doi: https://doi.org/10.1136/bmj.309.6968.1583a (Published 10 December 1994) Cite this as: BMJ 1994;309:1583
  1. R J Bray,
  2. C J Vallis
  1. Consultant anaesthetist Consultant anaesthetist Royal Victoria Infirmary, Newcastle upon Tyne NE1 4LP.

    EDITOR,—It is helpful to be reminded of the dangers of siphonage from patient controlled analgesia devices1 or, indeed, from any raised fluid reservoir in continuity with a patient's venous system. The valve that D A …

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