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Description  |
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BACKGROUND OF THE INVENTION
The present invention relates generally to a kit of resilient blocks
specifically configured, when arranged in assembled condition, to properly
position and support a patient's spine for surgical procedures and allow
free passage of X-rays for visualization. The present invention also
relates to an assemblage of blocks releasably secured one to the other in
position for supporting a patient in any one of flexion, neutral and
extension positions for spinal surgical procedures.
In U.S. Pat. No. 4,398,707, there is disclosed a surgical saddle for
positioning and supporting a patient for spinal surgery. In that system, a
base pad formed of soft foam rubber is provided with a tapered head
extension formed of a similar material. A leg portion, also constructed of
soft foam rubber, extends from the opposite end of the base. A pair of
laterally spaced ridges are adhesively secured on top of the base portion
along its opposite sides for support of the iliac crests of the patient's
pelvic bone such that the patient's abdomen and diaphragm hang freely
without compression against the spinal area. One of the purposes of that
invention consonant with the present invention is to preclude engorgement
of interspinal blood vessels to minimize loss of blood during the spinal
operation.
However, the system disclosed in that patent does not accommodate patients
of different sizes or patients having various conditions of the lumbar
spine, such as lordosis. flexion or neutral. For example, a surgeon may
wish to position the patient's spine in flexion for a laminectomy such
that the intervertebral spaces open up. Another surgeon, however, may wish
the patient to be in a lordotic position. The saddle of the previously
mentioned U.S. patent cannot accommodate patients of various sizes and
shapes including deformities, as well as place the patient in the various
required lumbar positions, i.e., the lordosis, flexion or neutral
positions. Nor may this device allow for passage of X-rays for
visualization.
According to the present invention, there is provided reusable surgical
positioning and support apparatus comprised of a plurality of reusable
resilient blocks formed to specific shapes and dimensions which, in
assembly, properly support a patient's spine for surgical procedures,
while allowing the abdomen and diaphragm to hang freely without
compression, eliminating interspinal venous engorgement. Certain of the
blocks may be alternated to allow positioning in the assemblage in any of
flexion neutral and extension positions, while positioning the patient for
spinal surgery. The blocks are preferably formed of an elastomer foam
having a vinyl-coated outer surface whereby they may be sterilized for
reuse. Additionally, the blocks carry hook or loop fasteners at various
locations along the blocks such that the blocks may be interconnected one
with the other to form the desired shape of the assemblage.
To enable the positioning and support apparatus hereof to accommodate the
different sizes and forms of patients, the primary blocks of the kit
include a base block (although the base block may be omitted in very small
patients), U-shaped block, inside and outside filler blocks, face and
chest blocks, and a pair each of flexion, lordosis and neutral blocks, as
described in detail hereinafter. These primary blocks may be provided in
various dimensions or numbers thereof as applicable for use in combination
with one another and other blocks. Thus, the configuration and location of
the blocks, and their selection in conjunction with their dimensional
relationships, may be used to form an assemblage of interconnected blocks
in a predetermined desired configuration to accommodate patients of
different size and shape, including patients with deformities, as well as
simultaneously affording positioning of the lumbar region for that
particular surgery. The assemblage of blocks is preferably mounted on an
elongated rigid base board and secured thereto by hook and loop fasteners.
The base board may be secured, e.g., by taping, to a standard operating
room table "C" arm extensions. In this manner, the patient may be
positioned as desired in accordance with the particular surgery to be
performed and with the size of the patient.
More particularly, the present invention provides a kit of resilient
building blocks for forming the positioning and supporting assemblage.
Particularly, a base block is provided having a central opening. The
underside of the base block is provided with pile material for connection
with hook fasteners provided on the upper side of a rigid base board.
Inner and outer filler blocks are provided and each has hook and pile
fasteners along its upper and lower sides, respectively. The inner filler
block is disposed at one end of the opening through the base block while
the outside filler block forms an endwise extension of the base block.
Both filler blocks, together with an end portion of the base block,
provide support for the superposed face and chest block. Two partial,
generally T-shaped, face and chest blocks are preferably provided as part
of the kit. One of the face and chest blocks has hook and loop fasteners
on its upper and lower faces, respectively, i.e., a lower face and chest
block, while the other has only pile on its lower face, i.e., an upper
face and chest block. In this manner, the upper or both the upper and
lower face and chest blocks may be used in superposition over the filler
blocks. A U-shaped block is secured on top of the base block by hook and
pile fasteners, the leg of the T-shaped block(s) facing the opening of the
U-shaped block. A strap is secured across the legs of the U-shaped block
adjacent its open end to assist in maintaining the legs generally parallel
one to the other in use and to prevent the legs from spreading in use.
A pair of blocks are disposed on opposite sides of the U-shaped block
overlying the side legs thereof. The upper surfaces of these blocks are
inclined downwardly toward one another in assembly and provide support for
the patient's iliac crests and ribcage. Hook and pile fasteners are used
to secure the pair of blocks to the U-shaped block. The kit includes three
pairs of such blocks which are selectively used depending upon the desired
patient position, i.e., lordosis, neutral or flexion. Thus, the shape of
the upper surfaces of the block is specifically designed to effect a
certain positioning of the patient's spine as required by the surgeon. For
example, the upper surface of the lordosis pair of blocks have convex and
concave arcuate portions spaced longitudinally one from the other to
dispose the patient in a lordotic position. The pair of flexion blocks has
a single convex surface extending from one end to the other to extend the
patient's spine. The pair of neutral blocks have a linearly extending
upper surface.
The base block and inside and outside filler blocks, are provided in one of
two thicknesses or depth dimensions, although additional blocks may be
provided in the dimensions as desired. For example, the base block and
filler blocks may be provided in 2-inch or 4-inch thicknesses, and blocks
of those dimensions are selectively used depending upon the size of the
patient. For example, a 2-inch base block would be used for a patient
having a height of 5'6" or less, whereas the 4-inch base block would be
used for a taller patient. Either the 2-inch or 4-inch filler blocks may
be used with either of the 2-inch or 4-inch base blocks depending upon the
particular size and shape of the patient. Likewise, one or more of the
face and chest blocks may also be used depending upon the particular size
and shape of the patient. Consequently, the present invention provides a
versatile kit and an assemblage of blocks for both positioning and
supporting a patient for spinal surgery and which blocks are adaptable to
support patients of different sizes and shapes and to position patients
depending upon the desired orientation of the spine for surgery while
still allowing unobstructed X-ray visualization of the spine.
Accordingly, in accordance with a preferred embodiment of the present
invention, there is provided an assemblage for positioning and supporting
a surgical patient facedown, comprising a generally rectangular base block
formed of resilient material having length, width and depth dimensions and
a central opening, a generally elongated U-shaped block formed of
resilient material having a base and a pair of leg portions extending from
the base defining a central opening and length, width and depth
dimensions, means for releasably securing the U-shaped block and the base
block one to the other with the U-shaped block superposed on the base
block and the openings in registration one with the other, a face and
chest block formed of resilient material superposed at least in part on
the base block adjacent the end of the U-shaped block remote from the base
for receiving the face and chest of the patient, a pair of elongated
blocks formed of resilient material superposed on the legs of the U-shaped
blocks to define a space laterally therebetween in registry with the
openings in the U-shaped block and the base block, each of the pair of
blocks having an upper surface inclined generally inwardly and downwardly
toward one another whereby the abdomen and diaphragm of the patient may
depend freely in a direction toward the spaces and openings and means for
releasably securing the pair of blocks and the U-shaped block one to the
other.
According to another aspect of the present invention, there is also
provided a kit for assembling surgical support and positioning apparatus
for a surgical patient, comprising a generally rectangular base block
formed of resilient material having length, width and depth dimensions and
a central opening, a generally elongated U-shaped block formed of
resilient material and having a base and a pair of leg portions extending
from the base, the U-shaped block having length, width and depth
dimensions, means carried by at least one of the base block and the
U-shaped block for releasably securing the base block and the U-shaped
block one to the other, with the U-shaped block in superposition relative
to the base block, a face and chest block formed of resilient material for
superposition at least in part on the base block adjacent the end of the
U-shaped block remote from the base block for receiving the face and chest
of the patient, a pair of elongated blocks formed of resilient materials
for superposition on the legs of the U-shaped block to define a space
laterally therebetween in registry with the openings of the U-shaped block
and the base block, each of the pair of blocks having an upper surface
inclined generally inwardly and downwardly toward one another when
superposed on the U-shaped block and means carried by one of the U-shaped
block and the pair of blocks for releasably securing the pair of blocks
and the U-shaped block one to the other.
Accordingly, it is a primary object of the present invention to provide a
novel and improved kit and an assemblage of resilient blocks for
positioning and supporting a patient for spinal surgery which accommodates
patients of different sizes and shapes and the surgeon's requirement for
different positions of the patient's spine presented for spinal surgery
while enabling X-ray visualization of the spinal region during the
surgical procedure.
These and further objects and advantages of the present invention will
become more apparent upon reference to the following specification,
appended claims and drawings.
BRIEF DESCRIPTION OF THE DRAWING FIGURES
FIG. 1 is a perspective view of an assemblage of blocks, constructed in
accordance with the present invention, illustrated on a rigid base board,
in turn, disposed on an operating table, a patient being illustrated by
the dashed lines in operable position on the assemblage;
FIG. 2 is an exploded perspective view of the assemblage illustrated in
FIG. 1;
FIG. 3 is a enlarged plan view of the assemblage illustrated in FIG. 1;
FIG. 4 is a cross-sectional view thereof taken generally about one line
4--4 in FIG. 3;
FIGS. 5a, 5b, 5c, 5d and 5e are left end elevational, inside front
elevational, right end elevational, rear elevational and bottom plan
views, respectively, of one of the pair of neutral blocks provided as part
of the kit and assemblage;
FIGS. 6a, 6b, 6c, 6d and 6e are left end elevational, inside front
elevational, right end elevational, rear elevational and bottom plan
views, respectively, of one of the pair of flexion blocks provided as part
of the kit and assemblage;
FIGS. 7a, 7b, 7c, 7d and 7e are left end elevational, inside front
elevational, right end elevational, rear elevational and bottom plan views
of one of the pair of lordosis blocks provided as part of the kit and
assemblage; and
FIGS. 8-12 are perspective views of various assemblages of the blocks
hereof for patients of different sizes and for different surgical needs.
DETAILED DESCRIPTION OF THE DRAWING FIGURES
Reference will now be made in detail to the present preferred embodiment of
the invention, an example of which is illustrated in the accompanying
drawings.
Referring now to the drawings, particularly to FIG. 1, there is illustrated
an assemblage, generally designated 10, of resilient blocks for
positioning and supporting a patient on an operating table 12 for spinal
surgery. The blocks in the assemblage are identified initially as follows:
a base block 14, an inside filler block 16 (FIG. 2), an outside filler
block 18, a U-shaped block 20, a pair of face and chest blocks 22, and a
pair of neutral blocks 24, it being appreciated that either one of a pair
of flexion blocks 26 as illustrated in FIGS. 6a-6e, or a pair of lordosis
blocks 28 illustrated in FIGS. 7a-7e, may be used in the assemblage in
lieu of the neutral blocks 24. The assemblage is mounted on a base 30.
Preferably, base 30 comprises an elongated, rigid board, preferably formed
of Lexan. On the upper surface of the board there is provided hook
fastener portions 32 of hook and pile fasteners. Hook fastener portions 32
are provided in strip form along opposite sides of board 30. A short strip
of hook fasteners 34 also upstand from a central portion of the board
adjacent its forward end. As illustrated in FIGS. 1 and 2, straps 36, for
example tape, may be used to secure the opposite ends of board 30 to
operating table 12.
As will be appreciated from the ensuing description, each of the blocks to
be described has the loop or pile portion of hook and loop fasteners
formed along its underside for securing the block to the underlying block
or board as will be apparent. Each block, except for the upper face and
chest block 22U, and the pairs of lordosis, flexion and neutral blocks,
have the hook portions of the hook and pile fasteners facing upwardly for
engagement with the downwardly facing pile fastener portions of the
superposed blocks.
Turning now particularly to FIG. 2, base block 14 is generally rectangular,
having length, width and depth dimensions, and a central opening 40 in the
shape of an oval. As indicated in FIG. 2, the side margins along the upper
face of base bock 14 have hook portions 42 of hook and pile fasteners and
an additional strip of hook portions 44 extend along one end of the base
block 14. It will be appreciated from the foregoing that strips of
corresponding loop or pile fastener portions are secured along the
underside of the base block 14 in similar positions for securement with
the upwardly facing hook portions 32 carried by board 30.
Inside and outside filler blocks 16 and 18 are formed, generally similar in
shape in plan one to the other. That is, both filler blocks 16 and 18 are
elongated and have convex and concave portions at their respective
opposite ends. Central strips of hook and pile fastener portions are
disposed along their upper and lower surfaces, respectively. In this
manner, when the inside filler block 16 is disposed within central opening
40 of the base block, its downwardly facing pile fastener portions engage
the upwardly facing hook fastener portions 34 of base board 30. Likewise,
when the outside filler block 18 is disposed at one end of base block 14,
the downwardly facing loop or pile fastener portion engages the upwardly
facing hook fastener portions 34 of board 30.
U-shaped block 20 is elongated and has a pair of side legs 4B and a base
portion 50. The central opening 52 of the U-shaped block opens through the
forward end thereof in a direction toward the outside filler block 18. The
upper inside marginal edge defining the central opening 52 is beveled or
inclined inwardly and downwardly at 54 to facilitate downward extension of
the diaphragm and abdomen of the patient. As illustrated, the entire upper
surface of the U-shaped block 20, with the exception of bevel 54, is
provided with hook fasteners and its underside, not shown, is provided
with loop or pile fasteners for securing U-shaped block 20 in
superposition to base block 14. A strap 55 having pile fastener material
along both sides is provided for securement across the open end of U-block
20 formed by the laterally spaced legs 48 in a manner described more
particularly hereinafter.
Each of face and chest blocks 22U and 22L has a generally elongated
T-shaped configuration. The upper surface of the lower face and chest
block 22L in the assemblage is provided with a strip of hook fasteners,
while the undersurface of both face and chest blocks 22U and 22L have loop
or pile fastener strips. Thus, the lower face and chest block 22L may
bridge the forward end of base block 14 and be secured in superposed
position over both outside and inside filler blocks 18 by engagement of
the hook and loop fasteners. The upper face and chest block 22U may be
superposed over the lower face and chest block 22L and secured thereto by
the hook and pile fasteners. This leaves the upper surface of face and
chest block 22U free of any fastener-type material. The face and chest
blocks are generally T-shaped to facilitate depression of the shoulders of
the patient and a resting surface for the patient's head, which will face
to one side or the other of the face and chest blocks when the patient is
in the appropriate surgical position.
Referring now to FIG. 2 in conjunction with FIGS. 5a-5e, the pair of
neutral blocks 24 will now be described. Each neutral block is elongated,
having the general shape of a triangle in cross-section at each
longitudinal position therealong. The flat upper surface 60 of each
neutral block 24 inclines inwardly and downwardly toward the other block
24 when in the assemblage illustrated in FIGS. 1 and 2. As will be
appreciated from a review of drawing FIGS. 5a through 5e, the width
dimension of blocks 24 is greater than the depth or height dimension. Loop
or pile fastener portions 62 are provided along the entirety of the
undersurface of the blocks 24 whereby they may be fastened by hook and
pile fasteners to the upper side of U-shaped block 48.
Referring now to FIGS. 6a-6e, a flexion block 26 is illustrated. As with
neutral blocks 24, each flexion block 26 has a shaped upper surface 66.
However, the upper surface 66 of flexion block 26 inclines inwardly and
downwardly toward its opposite flexion block when in the assemblage
illustrated in FIG. 2. Block surface 66 also curves in a generally convex
fashion in the longitudinal direction from its forward end 68 to its rear
end 70. At the forward end 68, the upper surface is generally convex in
cross-section at 69. At the rear end 70, surface 66 is convex in
cross-section at 71 adjacent its outer side 72 and concave at 76 along its
inside edge, the surfaces 72, 76 generally merging into surface 69 along
the length of the block. It will also be appreciated that flexion block 26
is higher in elevation adjacent its rear end 70 and lower in elevation
adjacent forward end 68. As with the neutral blocks 24, the undersurface
of the flexion block 26 illustrated in FIG. 6e is provided with loop or
pile fastener material 78.
Referring now to the lordosis block 28 illustrated in FIGS. 7a-7e, the
upper surface 80 is inclined downwardly and inwardly toward the opposite
block when the blocks 28 are in the assemblage illustrated in FIG. 2.
Upper surface 80 has a compound curve in the longitudinal direction.
Particularly, at the rearward end of the block, the inclined surface 80 is
convex at 82 and extends forwardly, where the curvature is reversed, to
provide an upwardly directed concave surface 84. The highest elevation of
the lordosis block 28 is at the apex of the convex surface portion 82, the
concave surface portion 84 terminating at the forward end at an elevation
below the elevation of the apex of the highest convex surface portion. As
illustrated in FIG. 7e, the lower or undersurface of the lordosis blocks
have loop or pile material 86 for engagement with the hook material on the
upper surface of U-block 20.
The neutral, flexion and lordosis blocks hereof are provided in pairs in
the kit. Each block of each pair, when in the assemblage, is the mirror
image of the other block of that pair of blocks on the opposite side of
the longitudinal centerline of the assemblage. Also, each of the resilient
blocks disclosed herein is formed of an elastomer foam having a vinyl
coating such that the blocks can be sterilized for reuse. The resiliency
of the blocks is about 20-40 durometer. Further, each block of each pair
of neutral, lordosis and flexion blocks has along its undersurface a patch
of hook fastener portions adjacent its forward corner. As will be
appreciated from the ensuing description, those patches engage the strap
55 extended over the legs of the U-block 20.
In a preferred form of the present invention, the Lexan mounting base is 38
inches long, 15 inches wide and has a depth of 1/2 inch. Two base blocks
14 are provided as part of the kit. One of the base blocks has a length of
23 inches, a width of 15 inches and a height of 4 inches. The oval shaped
opening 40 has a length of about 18 inches. The width of the opening 40 in
the base block 14 is 6 inches. The other base block is provided with
similar length and width dimensions, but its depth dimension is 2 inches.
Similarly, two different sizes of outside filler blocks are provided. Both
filler blocks have a length of 10 inches and a width of 6 inches but one
has a depth of 2 inches while the other has a depth of 4 inches. Likewise,
the two inside filler blocks have a length and width of 6 inches, while
one block has a depth of 2 inches and the other 4 inches. The U-shaped
block has length and width dimensions of 14.5 and 15 inches, respectively.
The U-shaped block is 4 inches in depth, and its central opening is 6
inches wide. Two foam face and chest blocks 22 are provided. Each block
has an overall length of 18 inches, a 5-inch width at the small end of the
block, a 12-inch width at the large end of the block and a depth of 2
inches. The lordosis, flexion and neutral blocks are each 16 inches long
and 4.5 inches wide. The highest elevation of the convex surface of the
lordosis block is 3.5 inches, while at the forward end of the block, the
elevation is 2.5 inches. For the flexion block, the highest elevation is 4
inches and the neutral block has a height of 3 inches.
In using the system hereof, the height of the individual is first
ascertained. If the patient's height is less than 5'6", the 2-inch blocks
are used, whereas if the height of the individual is greater than 5'6",
the 4-inch blocks are used. Additionally, the surgeon ascertains the
position of the spine necessary for the operation to be performed and,
based on that, determines which of the three pairs of lordosis, flexion or
neutral blocks will be used in the assemblage. Once these conditions are
ascertained, the assemblage of the blocks can go forward.
Straps are disposed across the base. For example, such straps may have pile
material on their undersurfaces for engagement with the hooks of the upper
surface of the base or they may comprise adhesive tape. The purpose of the
straps is to secure the board and assemblage to the operating table. The
base block 14 is then disposed such that its rear or base end aligns with
the end of base board 30 opposite the hook material 34. The base block 14
is mounted on the board simply by pressing it downwardly to engage the
hook and loop material. The appropriate inside and outside filler blocks
16 and 18 are applied in the positions illustrated. Depending upon the
particular curvature of the patient's spine, either 2-inch or 4-inch
blocks will be used with either of the 2-inch or 4-inch base blocks 14.
Outside filler block 18 is secured by pressing it down onto the upstanding
hooks 34. The inside filler block 16 is similarly secured. U-block 20 is
then disposed on top of base block 14 with the hook and loop fasteners in
engagement one with the other, the base 50 of U-block 20 overlying the
base of base block 14. The strap 55 is then laid across the upper surface
of U-block 20 adjacent its open end formed by legs 48. The pile fastener
material along its underside engages the hook material along the upper
surface of the leg ends to preclude spreading the legs 48 of U-block 20
laterally away from one another.
One or both of the face and chest blocks 22U and 22L are then applied in
overlying relation to the outside filler block 18, with the leg of the
generally T-shaped face and chest block extending longitudinally to
overlie the forward end of the base block and inside filler block 16.
Where only one face and chest block is used, the block 22U having only
loop fasteners on its underside is used such that the upper surface of the
block is free of any fastening material. If two blocks 22U and 22L are
used, then face and chest block 22U overlies block 22L.
The selected lordosis, flexion or neutral blocks are then applied. In FIG.
2, the neutral blocks are applied by pressing them against the upper
surfaces of the U-block 20 to engage the hook and loop material. The hook
fastener portions at the forward ends of these blocks engage the pile
fastener portion on the upper side of strap 55. The rear ends of blocks 24
extend slightly rearwardly of the end of the U-block 20 to enable a smooth
transition of pressure from the anterior iliac spine to the upper thigh
without undue pressure on the femoral nerve. If the lordosis or flexion
blocks are used, it will be appreciated that the higher elevation portions
of those blocks are located adjacent the rearmost portion of the
assemblage. The entire assemblage may then be secured to the operating
table if it has not already been secured thereto.
The patient may then be positioned facedown on the assemblage with the
patient's head resting on the face and chest block 22U. Thus, the
patient's diaphragm and abdomen lie in vertical registration with the
openings between the pair of blocks 24, 26 or 28, the U-shaped block 20
and base block 14. Consequently, the patient is in position for the
intended surgery.
In FIGS. 1-4, there is illustrated a block assemblage useful for a large
adult using the 4-inch base and filler blocks, both T-shaped had and chest
blocks, the U-shaped block and a pair of neutral blocks, it being
appreciated that the neutral blocks could be replaced by one of the pairs
of lordosis or flexion blocks depending upon the surgeon's need and the
patient's anatomy. A large number of various combinations of blocks may be
assembled to accommodate various patient positions and anatomical shapes,
the surgeon's needs and the overall size of the patient. FIGS. 8-12
illustrate representative examples of the various combinations of
assemblages, it being appreciated that other additional assemblages may be
provided as desired.
In FIG. 8, there is illustrated an assemblage of blocks useful for a small
adult (under 5 feet, 6 inches) where it is desirable to flex the patient's
neck. In this assemblage, a 2-inch base block 14, a 2-inch and a 4-inch
outside and inside filler blocks 18 and 16, respectively, a single 2-inch
face and chest block 22U, the U-block 20, and a pair of flexion blocks 26
are used. The neutral or lordosis blocks 24 or 28, respectively, may be
substituted for the pair of flexion blocks 26.
In FIG. 9, there is illustrated an assemblage for a small adult comprised
of a 2-inch base block 14, 2-inch outside and inside filler blocks 18 and
16, respectively, the U-block 20, a pair of face and chest blocks 22L and
22U, and a pair of flexion blocks 26.
In FIG. 10, there is illustrated an assemblage for a small adult comprised
of a 2-inch base block 14, 2-inch outside and inside filler blocks 18 and
16, respectively, a pair of face and chest blocks 22L and 22U, the U-block
20, and a pair of neutral blocks 24.
In FIG. 11, there is illustrated an assemblage for a small adult comprised
of a 2-inch base block 14 | | |
