U.S. patent number 3,807,404 [Application Number 05/340,294] was granted by the patent office on 1974-04-30 for probe unit for electro-surgical device.
This patent grant is currently assigned to Whaledent, Inc.. Invention is credited to Walter Henry Fredericks, Alan Neil Miller, Bernard Weissman.
United States Patent |
3,807,404 |
Weissman , et al. |
April 30, 1974 |
PROBE UNIT FOR ELECTRO-SURGICAL DEVICE
Abstract
A probe unit for applying high level high frequency voltages to
tissues to be treated has a tubular handpiece having an operative
end and a female connector fixed at the operative end and
connectable to a source of high level high frequency voltage. An
interchangeable plastic nose piece, which can be conical or
contra-angled in shape, includes a proximal end provided with a
mating male connector electrically engageable with the female
connector. An elongate conductor sleeve is in electrical
communication with the male connector and extends to a distal end
remote from the proximal end of the nose piece. A disposable probe
tip, which includes a cutting tip, is configurated so as to be
receivable in the elongate sleeve of the nose piece. The probe tip
has an elongate insulating cylindrical shell having two axial
slots. A resilient conductive wire, which forms part of the
external cutting tip, extends partially interiorly of the shell to
form two spaced opposing resilient arcuate portions which pass
through the respective slots and which are depressible into the
shell. In this manner, insertion of the shell into the sleeve
depresses the arcuate portions to thereby provide frictional
engagement and electrical contact between the cutting tip and the
sleeve.
Inventors: |
Weissman; Bernard (New York,
NY), Miller; Alan Neil (New City, NY), Fredericks; Walter
Henry (White Plains, NY) |
Assignee: |
Whaledent, Inc. (New York,
NY)
|
Family
ID: |
23332740 |
Appl.
No.: |
05/340,294 |
Filed: |
March 12, 1973 |
Current U.S.
Class: |
606/42;
606/45 |
Current CPC
Class: |
A61B
18/1402 (20130101); A61B 18/14 (20130101); A61B
2018/1253 (20130101); A61B 2018/1407 (20130101) |
Current International
Class: |
A61B
18/14 (20060101); A61n 003/02 () |
Field of
Search: |
;128/303.13,303.14 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Pace; Channing L.
Attorney, Agent or Firm: Friedman & Goodman
Claims
What is claimed is:
1. In an electro-surgical device, a probe unit for applying high
level high frequency voltages to tissue to be treated, said probe
unit comprising an elongate tubular handpiece having an operative
end; a conductive connector element disposed at said operative end
adapted to be connected to a source of high level high frequency
voltage; an elongate nose piece having a proximal end and a distal
end, said proximal end being provided with a portion generally
having configuration complementary to said operative end and said
connector element; electrical conductor means extending between
said proximal and distal ends, said conductor means including a
portion at said proximal end engageable with said connector element
and a conductive sleeve portion at said distal end; and a probe tip
comprising an elongate insulating cylindrical shell receivable in
said sleeve portion, said shell having two opposing axial slots and
a narrowed axial end, and a resilient wire forming a first portion
extending beyond said narrowed axial end to form an external
operating tip and forming a second portion disposed inside said
shell, said second portion being provided with two spaced opposing
resilient arcuate portions passing through said respective slots
and being depressible into said shell, whereby insertion of said
shell into said sleeve portion partially depresses said arcuate
portions to thereby provide frictional engagement and electrical
contact between said wire and said sleeve portion.
2. A probe unit as defined in claim 1, wherein said handpiece is
connected to a source of high level high frequency voltage, further
comprising a switch mounted on said handpiece at said operative
end, said switch being operatively connected to the source of
voltage, whereby the application of voltage at said probe tip is
controllable by manipulating said switch.
3. A probe unit as defined in claim 1, wherein said conductive
connector element comprises a female connector, and said conductor
means portion at said proximal end comprises a male connector
engageable with said female connector.
4. A probe unit as defined in claim 1, wherein said operative end
and said connector element together define a cylindrical end
portion, said proximal end of said nose piece being provided with a
cylindrical recessed portion adapted to view said cylindrical end
portion.
5. A probe unit as defined in claim 4, further comprising biassing
means interposed between said cylindrical and recessed portins for
providing frictional retention therebetween.
6. A probe unit as defined in claim 1, wherein said nose piece
proximal end is cylindrical exteriorly, said distal end being
conical exteriorly tapered away from said proximal end.
7. A probe unit as defined in claim 1, wherein said nose piece is
formed of synthetic resin, and said sleeve portion is embedded in
and extends through said distal end of said plastic nose piece.
8. A probe unit as defined in clain 1, wherein said nose piece
proximal end is cylindrical exteriorly, said distal end being
contra-angle shaped and tapered away from said proximal end.
9. A probe unit as defined in claim 1, wherein said wire is a
continuous section substantially doubled up with the two wire ends
forming part of said second portion disposed inside said shell, and
said first portion is in the form of a loop.
10. A probe unit as defined in claim 9, wherein said loop is
diamond shaped.
11. A probe unit as defined in claim 9, wherein said loop defines a
first plane, and wherein said second wire portion defines a second
plane substantially normal to said first plane.
12. A probe tip insertable into a conductive sleeve of a probe unit
utilized in conjunction with an electro-surgical device, said tip
comprising an elongate insulating cylindrical shell receivable in
said sleeve portion, said shell having two opposing axial slots and
a narrowed axial end, and a resilient wire forming a first portion
extending beyond said narrowed axial end to form an external
operating tip and forming a second portion disposed inside said
shell, said second portion being provided with two spaced opposing
resilient arcuate portions passing through said respective slots
and being depressible into said shell, whereby insertion of said
shell into said sleeve portion depresses said arcuate portions to
thereby provide frictional engagement and electrical contact
between said wire and said sleeve portion.
13. A probe unit as defined in claim 9, wherein said wire is a
continuous section substantially doubled up with the two wire ends
forming part of said second portion disposed inside said shell, and
said first portion is in the form of a loop.
14. A probe unit as defined in claim 13, wherein said loop is
diamond shaped.
15. A probe unit as defined in claim 13, wherein said loop defines
a first plane, and wherein said second wire portion defines a
second plane substantially normal to said first plane.
Description
BACKGROUND OF THE INVENTION
The present invention generally relates to electro-surgical
devices, and more particularly to a versatile probe unit for an
electro-surgical device and a disposable probe tip associated
therewith.
Electro-surgery devices and instruments which are capable of being
used for carrying out medical or dental operations are well known
in the art. Such devices generally comprise a source of high level
high frequency voltage whose application to a cutting tip can be
manually controlled. Such devices can be used for general, medical
and dental purposes.
However, the probe units utilized in conjunction with
electro-surgical devices of the prior art have several drawbacks
which the present invention resolves. For example, the conventional
probe unit is provided with a handpiece on which is mounted, at the
operative end, a chuck. The chuck utilized is not unlike that used
on drills. The probe or operating tip is inserted into the chuck
and the latter is adjusted to provide a secure grip on the
operating tip -- simultaneously providing electrical continuity
between the high level high frequency voltage source and the
operating tip of the probe unit. The conventional arrangement is
inconvenient since, in order to provide good electrical contact,
the chuck must be tightened -- this frequently requiring an
additional tool. Also, the chuck forms a permanent part of the
probe unit, this limiting the available configurations provided at
the operative end for use in special medical procedures. The
operating tip of the prior art is not disposable and is reused
after appropriate treatment of the tip. Consequently, the probe
unit of the prior art frequently causes time delays resulting from
the necessity of first sanitizing the operating tip subsequent to a
prior operation. An additional disadvantage of the prior art probe
units is that the probe tip, once secured in the chuck, is not
capable of rotation within the chuck. Consequently, in order to
orient the operating tip in a desired position, it is necessary to
rotate or manipulate the handpiece. In order to change the
orientation of the operating tip during an operation, the chuck
first has to be loosened so as to loosen the operating tip. A still
further disadvantage of the conventional probe unit is the
inconvenient placement of the power control switch. The
conventional electro-surgical device typically includes a console
which is connected to the probe unit by means of a coaxial cable.
The power control switch has commonly been provided on the console.
Such an arrangement requires the user to turn to the console
whenever the power is to be turned on or off -- an inconvenience
which is time consuming.
SUMMARY OF THE INVENTION
It is accordingly a primary object of the present invention to
provide a probe unit for an electro-surgical device which is not
possessed of the above described disadvantages associated with
conventional probe units.
it is another object of the present invention to provide a probe
unit as described above which is simple in construction and
economical to manufacture.
It is still another object of the present invention to provide a
probe unit of the type under discussion which provides a power
control switch on the handpiece to facilitate control of power flow
to the probe or operating tip.
It is yet a further object of the present invention to provide a
probe unit which utilizes interchangeable plastic nose pieces which
include electrical connectors mateable with a corresponding
connector on the handpiece or hand held portion and which also
includes a conductive sleeve into which disposable probe tips can
be inserted.
It is a further object of the present invention to provide a probe
unit which can be utilized with plastic nose pieces having
different configurations and which can be frictionally engaged with
the hand held portion.
It is still a further object of the present invention to provide a
probe unit which is rotatable subsequent to being assembled or
connected to the hand held portion.
It is yet a further object of the present invention to provide a
probe unit having a disposable probe tip which is frictionally
engageable with a respective nose piece of the unit.
It is an additional object of the present invention to provide a
disposable probe tip which is simple in construction and economical
to manufacture.
In order to achieve the above objects, as well as others which will
become apparent hereafter, a probe unit for applying a high level
high frequency voltage to tissue to be treated, in accordance with
the present invention, comprises an elongate tubular handpiece
having an operative end. A conductive connector element is disposed
at said operative end and is connectable to a source of high level
high frequency voltage. An elongate nose piece has a proximal end
and a distal end. Said proximal end is provided with a portion
generally having configuration complimentary to said operative end
and said connector element. Electrical conductor means extends
between said proximal and distal ends. Said conductor means
includes a portion at said proximal end engageable with said
connector element and a conductive sleeve portion at said distal
end. A probe tip comprises an elongate insulating cylindrical shell
receivable in said sleeve portion. Said shell has two opposing
axial slots and a narrowed axial end. A resilient wire forms a
first portion extending beyond said narrowed axial end to form an
external operating tip. The resilient wire also forms a second
portion disposed inside said shell. The second portion is provided
with two spaced opposing resilient arcuate portions passing through
said respective slots and being depressible into said shell. In
this manner, insertion of said shell into said sleeve portion
partially depresses said arcuate portion to thereby provide
frictional engagement and electrical contact between said wire and
said sleeve portion.
In accordance with a presently preferred embodiment, said handpiece
is connected to a source of high level high frequency voltage. A
switch is mounted on said handpiece at said operative end. The
switch is operatively connected to the source of voltage so that
the application of voltage of the probe tip is controllable by
manipulating said switch on said handpiece. Said conductive
connector element comprises a female connector and the conductor
means portion at said proximal end comprises a male connector
engageable with said female connector.
The nose piece is advantageously made from plastic and has a
proximal end which is exteriorly cylindrical. The distal end of the
nose piece can either be conical or contraangled in shape -- the
distal ends being tapered away from said proximal end in each case.
The sleeve portion is embedded in and extends through the distal
end of the plastic nose piece. Advantageously, biasing means is
interposed between the operative end and the nose piece to provide
frictional retention there-between.
The present invention also contemplates a novel disposable probe
tip which is insertable into a conductive sleeve of a probe unit
utilized in conjunction with an electro-surgical device. The
resilient wire is, according to the preferred embodiment, a
continuous section substantially doubled up with the two wire ends
forming part of said second wire portion disposed inside said
shell. Said first portion is generally in the form of a diamond
shaped loop. The wire is configurated in a manner so that the loop
defines a first plane and the second wire portion defines a second
plane substantially normal to the first plane.
BRIEF DESCRIPTION OF THE DRAWINGS
With the above and additional objects and advantages in view, as
will hereinafter appear, this invention comprises the devices,
combinations and arrangements of parts hereinafter described and
illustrated in the accompanying drawings of a preferred embodiment
in which:
FIG. 1 is a longitudinal cross sectional view of the probe unit in
accordance with the present invention;
FIG. 2 is an exploded enlarged view of the operative end of the
probe unit of FIG. 1, showing a nose piece and a probe tip
separated from the handpiece but aligned for engagement and mutual
connection;
FIG. 3 is similar to FIG. 2, but showing a differently shaped nose
piece connected to the handpiece, and the probe tip mounted in the
nose piece;
FIG. 4 is an enlarged top view of a probe tip in accordance with
the present invention;
FIG. 5 is a longitudinal cross section taken through line 5--5 of
FIG. 4; and
FIG. 6 is a transverse cross section taken through line 6--6 of
FIG. 4.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to the drawings, in which identical or similar parts have
been designated by the same reference numerals throughout, and
first referring to FIG. 1, a probe unit in accordance with the
present invention is generally designated by the reference numeral
10. The probe unit 10 comprises a plastic tubular housing 12 which
has an operative end 13. Removed from the operative end is a
transparent tubular wall or lens 14 which is connected to the
tubular housing 12 and forms therewith a hand held portion or
handpiece of the probe unit.
Provided at the operative end 13 of the tubular housing 12 is a
connector element in the form of a female connector 20. A pin 22
secures the connector 20 to the operative end of the tubular
housing 12.
A synthetic resin nose piece 24, to be more fully described
hereafter, includes a proximal cylindrical section 26 which is
internally dimensioned in a complimentary manner to the shapes of
operative end 13 and connector element 20 so as to receive the same
interiorly thereof. A spring 28 is advantageously provided between
the operative end 13 and the cylindrical section 26 to increase the
extent with which frictional engagement is obtained for insuring
frictional retention between the nose piece 24 and the operative
end 13.
Electrical conductor means including a male connector pin 30 is
provided at a proximal end of the nose piece 24 which is adapted to
be electrically engageable with the female connector 20.
A conductive sleeve 32, in electrical communication with the
connector 30, forms part of the electrical conductor means and
extends through a distal end of the nose piece 24 -- opening
exteriorly of the nose piece so as to have the interior of the
conductive sleeve 32 exteriorly accessible.
A probe tip 33 in accordance with the present invention comprises a
substantially cylindrical shell 34 whose external dimensions
closely approximate the internal dimensions of the conductive
sleeve 32 so that the shell is receivable in the latter. Provided
in the cylindrical wall of the shell 34 are two oppositely disposed
axial slots 35, to be more fully described hereafter. A conductive
resilient wire 37 is provided interiorly of the shell 34, arcuate
portions 36 thereof extending through the axial slots 35. Another
portion of the resilient portion extends through an open axial end
of the shell 34 to form a substantially closed loop 38 in the form
of a cutting tip.
The details of the operative end 13 of the probe unit 10, including
the connector element 20, the nose piece 24 and the probe tip 33
will be described more fully in connection with FIGS. 2-6.
Disposed at an opposite axial end to the operative end 13 is an
opening in the lens 14 through which a coaxial cable 40 enters
interiorly of the probe unit 10. In order to relieve some of the
tension on the coaxial cable 40, a shrink tube 42 is advantageously
provided which encloses and supports the coaxial cable. The coaxial
cable is advantageously provided with conductors which carry the
high level high frequency voltages to the probe unit 10. The
electrical arrangement for accomplishing this is well known to
those skilled in the art. Typically, the high level high frequency
voltage carrying conductor 40a of the coaxial cable 40 is directly
connected to the connector element 20. A portion 40b of the high
level high voltage carrying cable is also connected to one lead of
a neon lamp 44 -- the other lead (not shown) of the neon lamp being
capacitively coupled to the grounded shield 40c on the coaxial
cable 40. Such capacitive coupling limits the maximum current
passing through the neon lamp 44. Also, the lamp glows and thereby
provides an indication of when the voltage at the cutting tip 38
exceeds the breakdown voltage of the lamp 44 and high level high
frequency voltage is being applied to the cutting tip 38.
The specific arrangement of the high level high frequency voltage
cables and their connections interiorly of the probe unit 10 are
conventional and any other arrangement for applying the desired
voltages to the cutting tip 38 may be utilized.
The probe unit 10 is connected to an electro-surgical device which
generates the high level high frequency voltage. The probe unit is
connected to the console by means of the coaxial cable 40. One of
the novel features of the present invention is the provision of a
micro-switch 46 at the operative end 13 of the tubular housing 12.
This facilitates the control of power flow to the cutting tip 38 in
a very convenient manner. By placing the micro-switch 46 at the
operative end 13, the switch is positioned approximately in the
region of the user's thumb when the probe is held in a normal or
ordinary manner. Consequently, the user can conveniently and
quickly turn the power on and off by merely depressing or releasing
the microswitch 46.
A supporting block comprising portions 48a and 48b is provided
interiorly of the probe unit 10, the supporting block being
provided with a suitable opening or slot for the insertion of the
micro-switch 46. However, any other suitable means for supporting
the micro-switch 46 may be utilized.
Referring to FIG. 2, the operative end of the probe unit 10 is
shown in an exploded view with the various components aligned for
mutual connection.
The operative end of the tubular housing 12 is provided with a
cylindrical shell 49 which has a somewhat reduced external diameter
from the diameter of the tubular housing 12.
Positioned interiorly of the cylindrical shell 49 is the connector
element 20 which is conductive and preferably made from a metal
such as copper. Extending beyond the main portion of the connector
element 20 is a cylindrical projection 50. An axial bore 52 extends
substantially through the entire connector 20, the diameter of the
axial bore 52 being substantially equal to the outer diameter of
the connector pin 30 so that engagement therebetween provides a
good electrical connection.
It is possible, of course, to provide an axial bore, corresponding
to bore 52, in the nose piece 24 while having a pin corresponding
to pin 30 connected to the conductor 20. In this case, the
positions of the male and female members are merely
interchanged.
The nose piece 24 has a proximal end which has a substantially
cylindrical exterior 60 which is hollow to provide a cylindrical
recess or cavity 61. The internal diameter of the recess 61 is
substantially equal to the outer diameter of the cylindrical shell
49 so as to provide a press fit when the two are mated with one
another. However, according to another mode of operation, it is
possible to provide some clearance between the cylindrical shell 49
and the cylindrical recessed portion 61, as illustrated in FIG. 2.
With such an arrangement, at least one spring 28 is advantageously
provided at the outer peripheral surface of the cylindrical shell
49 which is compressed into a biasing condition when the nose piece
is mounted on the tubular housing 12. The purpose of this spring 28
is to enhance the frictional engagement between the nose piece and
the handpiece and prevent the nose piece from undesirably becoming
separated from the handpiece under normal conditions of use.
The nose piece 24 has a distal end 62 which is generally conical in
exterior configuration, being tapered away from the cylindrical
proximal end 60. Extending axially through the distal end 62 is a
conductive sleeve 32 which is embedded in the nose piece 24 and is
electrically connected to the male connector pin 30. The axial bore
52, the pin 30 and the sleeve 32 are generally coaxial and aligned
along the axis of symmetry of the tubular housing 12.
Although the above described elements have been shown to be
cylindrical, it should be clear that one skilled in the art can
readily change the general shape of the components to provide an
operative probe unit of other cross section which nevertheless
incorporates the principles of the present invention. Thus, for
example, the cylindrical shell 49 as well as the cylindrical
recessed portion 61 can readily be made to have square or
rectangular cross sections instead of being circular.
Still referring to FIG. 2, a probe tip 33 is shown which includes a
generally cylindrical hollow shell 34. The sleeve 32 is selected to
have a length sufficient to accommodate most of the axial length of
the shell 34, as illustrated in FIG. 1.
The shell 34 has a flared resilient end 64 whose external
dimensions are somewhat greater than the internal dimensions of the
sleeve 32. However, because of the resilient nature of the end 64,
the latter can be forced interiorly of the sleeve 32 while
resiliently abutting thereagainst so as to enhance the fricational
engagement therebetween and prevent the undesired outward movement
of the probe tip 33 under normal conditions of use. At the axial
end remote from the flared resilient end 64 is a narrowed end 66,
as best shown FIG. 5, to be described hereafter.
In FIG. 3, a modified nose piece 24' is provided which has a
different configuration from the conical nose piece illustrated in
FIG. 2. However, in all other respects, the nose piece 24' is
similar to the nose piece 24. In FIG. 3, the nose piece 24' as well
as the probe tip 33 have been connected to each other as during
normal use. Thus, the cylindrical shell 49 is enclosed by the
cylindrical proximal end 60 with the compressed spring 28 disposed
therebetween. The male connector pin 30 is engaged with the axial
bore 52 at the connector 20 to provide good electrical contact
between the two connectors.
The distal end 70 of the modified nose piece 24' is commonly
designated as having a contra-angled form wherein a substantially
straight proximal section 72 is angularly disposed with respect to
a substantially straight distal section 74. A sleeve section 76 is
disposed at the proximal section while a sleeve section 78 is
disposed in the distal section 74, the sleeve sections 76, 78 being
in electrical connection with one another. Since the sleeve section
76 is in electrical contact with the pin 30 of the male connector,
electrical continuity is provided between the connector 20 and the
sleeve section 78 via the connector 30 and the sleeve section 76.
With this modified arrangement, the probe tip 33 is receivable in
the sleeve section 78 in a similar manner as the probe tip is
receivable in the conductive sleeve 32 of FIG. 1. The cutting tip
38 is in electrical contact with the respective sleeves by virtue
of a press-fit contact between the arcuate portions 36 and the
sleeves, as will become apparent from a description of FIGS.
4-6.
The novel probe tip 33 in accordance with the present invention
which is suitable for use with the probe unit, described above,
generally comprises a shell 34 which is essentially cylindrical.
However, one end thereof, namely end 64, is flared and is resilient
in nature by virtue of the provision of axial slots 80.
Consequently, the flared resilient end 64 can be compressed when
made from any suitable plastic material.
Approximately midway between the two ends 64, 66 of the shell 34,
there are provided two oppositely disposed axial slots 35 in the
wall of the shell. The end 66, remote from the flared end 63, is
pinched or has a narrowed section, for reasons to be described.
A single section of wire 37 is provided which has two ends 82
disposed interiorly of the shell 34. The wire 37 is essentially
doubled up whereby the two ends 82 are disposed interiorly of the
shell 34 while a portion of the wire extends through the narrowed
end 66 to form a substantially closed diamond-shaped loop 38, in
the form of a cutting tip. The portions of the wire 37 which are
disposed interiorly of the shell 34 are provided with two spaced
arcuate sections 36 each of which is directed in opposite
directions and which extend through respective slots 35.
The two arcuate portions 36 together define a plane. The wire
portions which form transitions between the arcuate portions 36 and
the cutting tip loop 38 diverge gradually from the plane of the
arcuate sections 36 into a further plane defined by the loop 38,
the plane and the loop being substantially normal to the plane of
the arcuate portions 36. The transition is substantially completed
on the arcuate portion 36 side of the narrowed end 66, as best seen
in FIG. 6.
As will be appreciated, the twisted configuration of the wire 37,
taken together with the narrowed end 66, prevents the wire from
leaving the shell 34 even when the arcuate sections 36 are
compressed therein. This result arises because the gradually
divergent transition portions of the wire 37, even when the arcuate
portions 36 are compressed, define distances greater than the
height of the narrowed portion 66.
When the probe tip 33 is inserted into the sleeve 32 or sleeve
section 78, the arcuate portions 36 as well as the flared resilient
end 64 are inwardly or radially compressed so as to conform to the
internal diameters of the sleeve. Since the shell material 34, as
well as the wire 37 are made of resilient materials, both the
flared end 64 as well as the arcuate portions 36 resiliently apply
outward forces against the internal surface of the sleeve. With
respect to both the flared resilient end 64 as well as with respect
to the arcuate portion 36, the resilient biasing forces exerted
thereby increase the frictional engagement between the probe tip 33
and the nose piece 24 or 24'. However, with respect to the arcuate
portions 36, this also provides electrical contact between the wire
37 and the conductive sleeves. In this manner, the high level high
frequency voltages applied to the connector 20 are transmitted to
the cutting tip 38.
It should now be evident, the above described constructions
overcome the disadvantages described in the prior art. Thus, the
provision of a micro-switch 46 at the operating end 13 facilitates
the control of power to the cutting tip 38. By providing nose
pieces 24, 24', as described above, the nose pieces can readily be
removed by disengaging the latter from the tubular housing 12. This
permits interchangeability of differently shaped nose pieces and
selection of a nose piece which is most suitable for a particular
application.
Another advantage of the subject invention is the provision in the
nose piece of a conductive sleeve which is configurated to receive
a dispensable probe tip 33. As should be evident from the above
description, as well as from FIGS. 4-6, the probe tips 33 are
simple and economical to manufacture. Consequently, they can be
made at low enough costs so as to make the same dispensable. This
obviates the need for treating tips subsequent to previous surgical
procedures when they are needed. Of course, this also eliminates
the possibility that an improperly treated cutting tip may cause
infection in the treated patient. It is contemplated, for example,
that each probe tip 33 be individually and sanitarily packaged
whereby each probe tip is only utilized for one surgical
operation.
It will also be appreciated that the subject invention permits the
relative rotation of the nose piece 24 or 24' with respect to the
tubular housing 12. When a contra-angled nose piece 24' is
utilized, this facilitates orientation of a probe tip in a simple
and efficient manner, even during an operative procedure. Since the
pin 30 remains engaged with the connector 20 during such relative
rotary motion, electrical continuity is assured even if relative
rotation of the nose piece is effected while the voltages are
applied.
Similarly, the probe tip 33 can be rotated relative to the nose
piece in which it is positioned. In this connection, it will be
noted that there are not provided any latching means which prevent
this rotation. Thus, it is possible to orient, for example, the
plane defined by the cutting tip or loop 38 in any desired plane by
simply gripping the cutting tip or shell 34 and turning it relative
to the nose piece. When this is done, a force only sufficient to
overcome the frictional engagement between the sleeve and the
resilient end 64 and between the sleeve and the arcuate portions 36
must be overcome.
The probe unit 10 in accordance with the present invention thereby
economically facilitates convenient interchangeability as well as
adjustment or orientation of the operative elements of the probe
unit. Such versatility has not been provided in conventional probe
units.
Numerous alterations of the structure herein disclosed will suggest
themselves to those skilled in the art. However, it is to be
understood that the present disclosure relates to a preferred
embodiment of the invention which is for purposes of illustration
only and is not to be construed as a limitation of the
invention.
* * * * *