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Dual 24" Diameter Lighthead Positioning
Fixturescontainingdual24"diameterlightheads
require some special positioning considerations.
The small diameter of the lightheads allows the
lightsourcetobemoreeasilyobstructedbythe
surgicalstaff.Itisveryimportantthatthesurgical
site remain illuminated even though the head and
handsofthesurgeonandthesurgicalstaffmay
bedirectlyinthecentrallightbeampath.Inorder
to minimize shadowing, the lightheads should be
positioned so that their light beams are angled into
thesurgicalcavity.Regardlessofthesurgicalsite,
these lights should be positioned to maintain an
angleofapproximately30°aboutanimaginaryline
running perpendicular to the bottom of the surgical
site.Seegure14.
Figure 14.
Tiltingthelightheadswillgivealargerlightbeam
angle.Seegure15.Finalpositioningandfocus
adjustments can be done by the surgeon using
thesterilefocus/positioninghandles.Focuscon-
trolsshould bepositioned whereeasily reached
bynon-sterilepersonnel.
Figure 15.
Triple Lighthead Positioning
Triple lighthead systems will either consist of a
large diameter lighthead with two 24" satellites
orthree24"lightheads.Therearetwobasicposi-
tioning strategies that can be used to obtain the
bestilluminationpossible.Therstistoalignall
three lightheads to the centerline of the table with
thelargelightheaddirectlyoverthecenterofthe
surgicalsite.Thesecondistoclusterthelightsin
a circular arrangement over the surgical site with
eachlightheadabout120°awayfromeachother.
Thewholeclustershouldbepositionedtominimize
interference with the head and shoulders of the
surgicalstaff.Seegure16.
Figure 16.
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