... reduction and stabilization of both the forearm fractures, as ... Cast- Long arm, Short arm, thumb spica, long leg ... Can be univalved or bivalved to reduce the risk ...
www.jhbmc.jhu.edu/Ortho/consultant/5mcf.html - 37k

... Each compressive dressing was then sequentially univalved and bivalved to measure the decrease ... Forearm alone, 73.1, 1.67, ... LA Fiberglass cast, 10.8, 0.39, 21.4, 57.2 ...
www.hwbf.org/ota/am/ota00/otapo/OTP00054.htm - 5k - Zusätzliches Ergebnis

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Note added at 23 mins (2005-02-21 19:28:41 GMT)
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Bivalving Casts
When a cast is bivalved, it is completely split longitudinally
along opposing sides of the cast. Splitting the cast into anterior
and posterior halves is preferred. The purpose of bivalving is
to allow room for soft tissue swelling, thus lessening the chance
of postcasting compartment syndrome. It is important that the
underlying cast padding also be completely split underneath
the cast cuts; otherwise, the cast padding can restrict swelling
and a compartment syndrome could still develop.

... Hoover & Siefert (2000) noted that univalving a cast relieved pressure by 30%. Bivalving a cast produced an additional 35% reduction in pressure. ...
www.orthopaedicnursing.com/pt/re/ orthonurs/fulltext.00006416-200105000-00004.htm

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Note added at 26 mins (2005-02-21 19:31:49 GMT)
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\"univalved forearm cast\" no \"e\"

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Note added at 13 hrs 14 mins (2005-02-22 08:19:30 GMT)
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I am not completely sure what is maeant in your context. As I remember my clinical experience, forearm casts are only univalved. Bivalving means that you split the cast twice which results in 2 parts. Univalving means that the cast is only split once. It is still in one piece, but no longer a closed cylinder.