U.S. patent number 3,860,008 [Application Number 05/402,924] was granted by the patent office on 1975-01-14 for flat drain.
This patent grant is currently assigned to Dow Corning Corporation. Invention is credited to David B. Batdorf, James B. Davidson, Kenneth G. Miner, Thomas D. Talcott.
United States Patent |
3,860,008 |
Miner , et al. |
January 14, 1975 |
**Please see images for:
( Certificate of Correction ) ** |
FLAT DRAIN
Abstract
This is a drain formed of an elastomeric material having a
series of channels spaced from each other, the channels defined by
walls comprising a pair of rods connected by a web, the rods lying
on two different planes.
Inventors: |
Miner; Kenneth G. (Homer
Township, Midland County, MI), Talcott; Thomas D. (Midland,
MI), Davidson; James B. (Midland, MI), Batdorf; David
B. (Thousand Oaks, CA) |
Assignee: |
Dow Corning Corporation
(Midland, MI)
|
Family
ID: |
23593830 |
Appl.
No.: |
05/402,924 |
Filed: |
October 3, 1973 |
Current U.S.
Class: |
604/93.01 |
Current CPC
Class: |
A61M
27/00 (20130101) |
Current International
Class: |
A61M
27/00 (20060101); A61m 027/00 () |
Field of
Search: |
;128/348-351,208 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Other References
ACMI Catalogue - 1938 - pg. 41..
|
Primary Examiner: Truluck; Dalton L.
Attorney, Agent or Firm: Needleman; Gordon
Claims
That which is claimed is:
1. A surgical drain comprising a series of rods lying on two
horizontal planes, the rods of one plane staggered in relation to
the rods on the other plane, the rods on the same plane in spaced
relation to each other and the rods on the plane connected to
adjacent rods on the other plane by a web the drain adapted to be
torn along a web on a line substantially parallel to a rod and
adjacent rods are in acute angular relation to each other.
2. A surgical drain formed of elastomeric material having a series
of spaced channels substantially wedge shaped in cross section
defined by walls, each of the walls comprising a first rod portion
and a second rod portion connected by a web portion wherein the
first rod portion lies on the first plane and the second rod
portion lies on a second plane spaced from the first plane and the
first rod portion is in staggered relation to the second rod
portion.
3. A drain as set forth in claim 2 wherein the distance between the
surface of the first rod portion of the one wall and the surface of
the rod portion of the other wall is less than the distance between
the webs of the walls.
4. A surgical drain as set forth in claim 3 wherein the drain is
adapted to be torn along a web on a line substantially parallel to
a rod portion and adjacent webs are in acute angular relation to
each other.
Description
BACKGROUND OF THE INVENTION
Conventionally, surgeons use drains to remove unwanted fluids from
a surgical wound. The drain is first installed fairly deeply in the
wound or incision and extends outside the animal body in which the
wound is located. As the wound heals the drain is pulled out and
cut off. It may be left in the wound for an extended period of time
and should have the construction that will not cause pain or trauma
when the patient moves about. Tubular drains such as the Penrose
drain tend to collapse or clog with the debris or coagulant blood
destroying their efficacy. Obviously, if a drain is clogged or
closed and the necessity for drainage still exists a new drain must
be inserted causing discomfort to the patient.
Absorbent dressings such as gauze or a packed Penrose tend for the
most part to loose their drainage capacities very quickly in the
wound. Plain gauze drains absorb fluids and particulate matter
thereby inviting infection, macerating the wound and surrounding
tissue while creating the possibility that the drain will adhere to
the tissue or might ultimately become hard, nonpliable and thus
painful to the patient.
The patent to Schwarzmayr, U.S. Pat. No. 2,134,152 issued Oct. 25,
1938 discloses a strip drain at FIGS. 9 and 10 which includes a
series of elongated ribs 13 which are in spaced parallel relation
on a base and each pair of which defines a channel 14. Note that
the openings in the channel are not constrained and that the ribs
are of rectangular configuration.
SUMMARY OF THE INVENTION
This invention is directed to a one piece, flat surgical drain
formed of a series of elongated round rods or tubes which are
positioned on two planes, are in staggered relation to the rods on
the other plane from that on which they lie, are spaced from each
other and connected to the adjacent staggered rods by elongated web
portions. The set of three adjacent rods including two on the same
plane and a rod in staggered relation to them and their connecting
webs defines a triangular channel leading the fluids to be drained
from the surgical wound or cavity. The web portions extend along
the length of the rods on which they are attached. The use of a
series of channels avoids the danger of clogging that a drain
having a single lumen may encounter. The flat drain cannot collapse
as can a tubular drain nor does shrinkage seriously effect its
operating capabilities. Varying widths of drains may be easily and
quickly provided by tearing longitudinally along a rib. Extremely
wide areas may be drained by placing two or more strips side by
side. The area of possible infection is reduced in comparison with
round drains due to the fact that only a narrower opening is
required. If a thicker drain should be needed the strips can be
stacked one on top of another or rolled into a circular
section.
Of particular importance is the fact that the distance between the
spaced rods is less than the distance between the web of the rods
preventing larger particulate matter or tissue from entering the
channel and clogging or plugging them.
BRIEF DESCRIPTION OF THE DRAWINGS
Other objects and attendant advantages of the present invention
will become obvious to those skilled in the art from a reading of
the following detailed description when read in conjunction with
the accompanying drawings wherein:
FIG. 1 is a top plane view of the drain.
FIG. 2 is a section taken on a line 2--2 of FIG. 1.
DESCRIPTION OF PREFERRED EMBODIMENTS
There is shown in the drawings a flat strip drain comprising a
series of elongated rods 10 which lie on two planes which are in
spaced parallel relation to each other. The rods 10 are positioned
in two planes which are in spaced relation to each other and the
rods on the first plane are in staggered relation to the rods on
the second plane. The adjacent rods on different planes are
attached to each other by elongated, fairly thin webs 12 which
extend along the length of the rods. The combination of two rods on
the same plane adjacent to each other and spaced from each other
and the staggered rod with which they are attached lying on a
different plane and the attachment webs form a somewhat triangular
channel which is the drainage channel 14. The distance between the
spaced adjacent rods which defines the side walls of the channel is
less than the distance of the two webs which partly define the
channel thereby defining a constricting opening which will prevent
tissue or particulate matter from getting into the channels and
clogging them.
The strip drains disclosed are formed of a physiological inert
elastomeric material preferably one of the family of silicone
rubbers. Under certain circumstances organic rubbers made from
butyl polymer or the natural polymer from the hevea tree could be
utilized. The silicone rubbers which may be used in this invention
can be either of the heat vulcanizing or room temmperature
vulcanizing type. Since these rubbers are intended for medical
purposes fillers, vulcanizing agents and other constituents should
be chosen for their non-toxic physiological, inert characteristics.
The drains are formed by well known extrusion processes.
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