ROUNDS
RESPONSE.
Rounds is your vehicle for sharing your orthopaedic
skills and experience. Your response to Rounds will be published in
a future issue of Body Cast. We invite you to suggest questions for
this column. Please address all submissions to: The Editor, Body Cast,
18 Wynford Drive, Suite 715A, North York, Ontario, M3C 3S2.
This
Issue's Rounds Question -
Please tell
us: What structures make up the syndesmotic ligaments?
What is their function?
(responses
to be published in next issue)
In
the last issue of Body Cast, Rounds
asked: What is a sequestrum?
The following responses were received:
Mardy McPolin responded with:
A sequestrum is a necrotic segment of bone without blood supply that acts
as the nidus for infection in chronic osteomyelitis.
(Nidus is a Latin word for nest: And like a nest that holds things, this one
is a repository for bacteria or other agents of disease to develop, this is a
nidus of infection.)
From Janet Cannon:
Sequestrum is a fragment of a necrosed bone that has become separated
from vital surrounding tissue. It can result from injury
or disease.
It is a complication of osteomyelitis (bone disease). It presents
as a sinus tract, burrowing from within the bone out through the
soft tissue, exiting through the skin, and resulting in the drainage
of pus.
From Suzanne Groulx:
A sequestrum is a piece of dead bone that has become separated from healthy
bone as a result of injury or disease.
From Earl Oborowsky:
A sequestrum is a piece of dead bone that has become separated during the
process of necrosis from normal bone. It is usually a complication of osteomyelitis.
From Heather Wong:
This means a piece of dead bone that has become separated from
the rest of the bone during the process of necrosis from normal
bone. A complication from osteomyelitis.
With osteomyelitis, the infection in the bone leads to increased
intramedullary pressure due to inflammatory exudates. Bone necrosis
follows due to lack of blood supply. Sequestra are formed.
Responses
were also received from: J. Carragher, M. Christenson, E. Christiansen,
A. Crossman, A. Gibbs, M. Gillingham, R. Grenier, R. Ip Fung Chun,
B. Lavallee, B. Letourneau, C. Longphee, D. Longphee, L. Lough,
L. MacDonald, G. Marshall, B. Matheson, J. Maulucci, J. Movasseli,
R. Pagan, T. Ogden, J. Pike, L. Pizzale, P. Power, C. Rivers,
B. Sheppard, A. Tarambikos, T Yorke, and A. Wentzell.
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