U.S. patent number 3,675,642 [Application Number 05/057,517] was granted by the patent office on 1972-07-11 for rectal cone for use in postoperative treatment.
Invention is credited to Peter Herent Lord.
United States Patent |
3,675,642 |
Lord |
July 11, 1972 |
**Please see images for:
( Certificate of Correction ) ** |
RECTAL CONE FOR USE IN POSTOPERATIVE TREATMENT
Abstract
A rectal cone is disclosed which is used in postoperative
treatment following a marked enlargement of the anal canal during
the operative procedure and which presents a peripheral surface
having critical characteristics of configuration and dimension for
accomplishing physiological benefits and convalescence with minimum
discomfort.
Inventors: |
Lord; Peter Herent
(Beaconsfield, Buckinghamshire, EN) |
Family
ID: |
22011065 |
Appl.
No.: |
05/057,517 |
Filed: |
July 23, 1970 |
Current U.S.
Class: |
606/197;
600/32 |
Current CPC
Class: |
A61M
29/00 (20130101) |
Current International
Class: |
A61M
29/00 (20060101); A61m 029/00 (); A61b 017/00 ();
A61f 005/00 () |
Field of
Search: |
;128/95,98,341 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Pace; Channing L.
Claims
I claim:
1. In postoperative treatment following the operational procedure
of enlargement of the anal canal, the insertion in said anal canal
at intervals of short duration of diminishing frequency of a rectal
cone having an insertable portion terminating in a shoulder
portion, said insertable portion being about 2 3/4 inches to 4
inches in length and presenting a smooth peripheral surface the
transverse cross sections of which along its length are
substantially circular and the longitudinal cross section of which
in the plane of the longitudinal axis presents a curved blunt end
flaring outwardly and toward said shoulder with progressively
diminishing gradual curvature to a maximum diameter of about 1 1/4
inches to 1 3/4 inches that is spaced from said shoulder by about
1/4 inch to 1 1/4 inches and a gradually curved waist in the region
between said maximum diameter and said shoulder the innermost
diameter of which is less than said maximum diameter by about
one-eighth inch to five-sixteenths inch, the diameter of said
shoulder portion of said cone being sufficiently greater than said
maximum diameter of said insertable portion to effectively restrain
further insertion when said insertable portion is fully
inserted.
2. Postoperative treatment according to claim 1 which comprises the
insertion of the rectal cone defined in said claim wherein the
insertable portion is substantially 3 3/8 inches in length, the
maximum diameter is substantially 1 1/2 inches, the spacing of the
maximum diameter from the shoulder is from about seven-eighths inch
to about 1 1/4 inches, the minimum diameter of the waist is about
one-eighth inch less than said maximum diameter and which comprises
a zone about 1 1/2 inches in length extending from said minimum
diameter of said waist the diameter of which differs from said
maximum diameter by not more than substantially one-eighth
inch.
3. A rectal cone for postoperative insertion in the anal canal
comprising an insertable portion terminating in an annular shoulder
portion, said insertable portion being about 2 3/4 inches to 4
inches in length and presenting a smooth peripheral surface the
transverse cross sections of which along its length are
substantially circular and the longitudinal cross section of which
in the plane of the longitudinal axis presents a curved blunt end
flaring outwardly and toward said shoulder with progressively
diminishing gradual curvature to a maximum diameter of about 1 1/4
inches to 1 3/4 inches that is spaced from said shoulder by about
three-fourths inch to 1 1/4 inches and a gradually curved waist in
the region between said maximum diameter and said shoulder the
innermost diameter of which is less than said maximum diameter by
about one-eighth inch to five-sixteenths inch, the diameter of said
shoulder portion of said cone being sufficiently greater than said
maximum diameter of said insertable portion to effectively restrain
further insertion when said insertable portion is fully
inserted.
4. A rectal cone according to claim 3 wherein said longitudinal
cross section of said peripheral surface of said insertable portion
comprises a zone from approximately 1 1/4 inches to 1 3/4 inches in
length which extends from said minimum diameter of said waist so as
to include said maximum diameter and the minimum diameter which
differs from said maximum diameter by not more than about
three-eighths inch.
5. A rectal cone according to claim 3 which includes an integral
handle that protrudes from the shoulder end of said cone and is
adapted to be grasped with the fingers to facilitate insertion and
removal of said cone.
Description
FIELD OF THE INVENTION
This invention relates to operative techniques involving the anal
canal such as hemorrhoidectomy, fistulectomy and fissurectomy.
BACKGROUND OF THE INVENTION
Operations of the nature aforesaid are of relatively common
occurrence. Such operations when carried out according to
conventional procedures are attended with a great deal of
postoperative discomfort. Moreover, recurrence of the condition
giving rise to the necessity for the operation is not uncommon.
GENERAL STATEMENT OF THE INVENTION
According to this invention an operative technique is utilized
wherein the anal canal is markedly enlarged. This procedure is then
followed by the insertion of a rectal cone at intervals of short
duration of diminishing frequency. In order to accomplish the
objects of the invention, the size and dimensional characteristics
of the rectal cone are of critical importance. One of the
advantages that is afforded by this invention is that postoperative
pain and discomfort are very greatly reduced, enabling the
discharge of the patient from the hospital on the following day.
Moreover, recurrence of the condition giving rise to the operation
is greatly reduced as compared with prior procedures. The use of
the rectal cone of this invention also has the advantage of
preventing strictures and preventing the formation of scar tissue.
Other advantages as compared with prior practices are that
postoperative complications are lessened and, more generally,
experience with many hundreds of patients has demonstrated that
recovery is decidedly hastened and a much more pleasant
postoperative convalescence is made possible.
During the course of the operative procedure the anal canal and the
lower portion of the rectum are markedly enlarged and such tissue
removed as is deemed necessary. For a short time thereafter a
moistened sponge may be inserted into the anal canal and then
removed.
In the practice of this invention the operative enlargement of the
anal canal is followed by the employment during convalescence of
the rectal cone, the use of which has been discovered to afford the
aforesaid advantages as compared with prior practices but which
must be critically dimensioned in order to have these beneficial
effects. This postoperative treatment typically involves an
insertion of the rectal cone for a period of about 1 minute on the
day after the operation and on every day thereafter during the next
several weeks under the guidance and at the discretion of the
surgeon. Thereafter the frequency of insertion may be decreased
over a period of several months and finally discontinued. When the
rectal cone is properly dimensioned in accordance with this
invention the aforesaid postoperative treatment has the effect of
removing physiological abnormalities which were a causative factor
in the condition giving rise to the operative necessity so that
recurrence is reduced to a very low minimum and discomfort during
convalescence is greatly reduced as compared with prior
practices.
DETAILED DESCRIPTION OF THE INVENTION
In order to obtain the advantages and physiological response that
may be realized according to this invention, the rectal cone must
be of a highly specific nature as regards peripheral shape and
dimensions. The rectal cone in its preferred form is shown
substantially to scale in the accompanying drawing wherein FIGS. 1
and 2 are side and top views, respectively. The cone comprises an
insertable portion 10, the annular shoulder portion 11, and a
handle 12. The length of the insertable portion, which is indicated
by the dimension l.sub.1, is 3 3/8 inches. The insertable portion
presents a smooth peripheral surface, the transverse cross sections
of which along its length are substantially circular. The
longitudinal cross section of the insertable portion in the plane
of the longitudinal axis presents a curved blunt end that flares
rearwardly, as shown, with progressively diminishing gradual
curvature to a maximum diameter of 1 1/2 inches, which is indicated
by the dimension d.sub.1. This maximum dimension is spaced from the
shoulder portion by a distance l.sub.3 about seven-eighths inch to
1 1/4 inches. In the region between the shoulder portion and the
portion having maximum diameter the longitudinal cross section has
a gradually curved waist such that the innermost diameter d.sub.2
is about one-eighth inch less than the aforesaid maximum diameter
of 1 1/2 inches. Preferably the longitudinal cross section of the
peripheral surface of the insertable portion comprises a slightly
curved zone approximately 1 1/2 inches in length which is below
said waist and within which the aforesaid maximum diameter occurs.
This zone is indicated on the drawing by the dimension l.sub.2 and
throughout this zone the departure from the maximum diameter
preferably is not more than about one-eighth inch.
As regards the annular shoulder portion 11, the dimensional
characteristics are not as critical inasmuch as the function of the
shoulder is to be sufficiently greater in diameter than the maximum
diameter of the insertable portion to effectively restrain further
insertion when the insertable portion is fully inserted. Similarly,
the handle 12 may be of any suitable size and dimension which
facilitate handling when inserting and removing the rectal cone.
For convenience in the latter stage of convalescence the cone may
have peripheral markings 13 thereon at suitable diameters which
indicate degrees of partial insertion which the operating surgeon
in his discretion may regard as desirable under certain
circumstances.
The dimensions of the rectal cone have been found to be critically
important. If the maximum diameter is substantially greater than
about 1 1/2 inches difficulties are likely to be encountered due to
subsequent incontinence. If the minimum diameter is substantially
less than about 1 1/2 inches the risk of post-operative
complications such as pain, scarring and recurrence is raised to an
unreasonable degree. Thus, a maximum diameter of the order of 1 1/2
inches has been found to be of utmost importance in obtaining the
advantages hereinabove stated including more especially prevention
of recurrence of the physiological condition which initially
necessitated the operation. More generally, the aforesaid
dimensions have been found to be critical to the realization of the
desired physiological response.
While the dimensional characteristics of the rectal cone are of
critical importance, a slight amount of tolerance is permissible.
Thus the dimension l.sub.1 as shown in the drawing may vary between
2 3/4 inches and 4 inches. The maximum diameter d.sub.1 may vary
from 1 1/4 inches to about 1 3/4 inches. The spacing of the maximum
diameter from the shoulder may vary between about three-fourths
inch to about 1 1/2 inches. As regards the dimension d.sub.2, the
extent to which it is less than the maximum diameter may be of the
order of one-eighth inch to five-sixteenths inch. As regards the
dimension l.sub.2, it may vary from about 1 1/4 inches to about 1
3/4 inches and in this zone the diameter is not less than the
maximum diameter by a distance more than about five-sixteenths
inch.
The cone may be made to proper dimensions from any suitable solid
material presenting a smooth, non-irritating surface such as a
thermosetting plastic. The interior of the cone may be solid or
hollow.
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