Surgery – Body rests – supports or positioners for therapeutic purpose
Patent
1998-04-24
2000-06-06
Brown, Michael A.
Surgery
Body rests, supports or positioners for therapeutic purpose
2483164, A61B 1500
Patent
active
060705841
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a support structure for fixing a medical instrument in a predetermined position, comprising at least one elongated support member having means for fixing the same in a predetermined position and being connected to a first support arm laterally directed from said support member, said first support arm being in turn connected to a second support arm forming an anise with said first support arm and supporting a slide body, which has means to carry said instrument and is displaceable and fixable relative to the second support arm, the support member and the interconnections of the support arms comprising means to permit lateral displacement of the second support arm relative to the support member.
BACKGROUND OF THE INVENTION
In laparoscopy, for example, a camera is usually coupled to the laparoscope. The operator moves the instrument and the laparoscope down through entrance ports, so-called trocars, placed in the abdominal wall. In order to enable the operator to use both hands, an assistant/cameraman is required to hold and guide the laparoscope/camera as the operator desires. Savings can be made if an operation assistant can be replaced by a mechanical structure which can hold the medical instrument, e.g. the laparoscope, in a predetermined position and which can be simply repositioned by the operator himself. Various devices are known which can be used for this purpose, but all are complicated by having motor-driven functions. Such a known device is shown and described in U.S. Pat. No. 5,351,676. Here there are achieved the functions described by way of introduction with the aid of telescoping or articulated arms with electric motors and electromagnetically controlled braking means for adjusting and fixing in a certain position. This known device is particularly expensive and complicated.
SUMMARY OF THE INVENTION
The purpose of the present invention is in general to achieve a support structure of the type described by way of introduction which consists of few parts, is simple and inexpensive, but still fulfills the requirements which are placed on its use, in particular in laparoscopy.
This is achieved according to the invention by virtue of the fact that the second support arm extends vertically from the laterally directed first support arm and that the slide body is displaceable on the second support arm against the effect of a friction which is selected so that the slide body is displaceable by hand force but retains its position when it is only loaded by the medical instrument.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be described in more detail with reference to examples shown in the accompanying drawings, where
FIG. 1 shows a schematic front view,
FIG. 2 shows a schematic view obliquely from the side.
FIG. 3 shows a schematic side view of a first embodiment of a support structure according to the invention, and
FIG. 4 shows a schematic perspective view of a second embodiment of a support structure according to the invention.
DETAILED DESCRIPTION OF THE INVENTION
The support structure shown in FIGS. 1-3 comprises first structure members in the form of two posts 1, which are designed to be fixed vertically on either side of an operating-table 2, for example, with the aid of existing fixing means on the operating-table which are used to fix sedation equipment. The posts are provided at their upper ends with through-holes 3 of rectangular cross-section, through which a support arm 4 extends. The support arm 4 is of corresponding cross-section and extends with very little play through the holes 3, so that it can be displaced laterally by hand but is prevented from rotation.
On the support arm 4, a second support arm 5 is fixed in a position in which it extends vertically upwards from the support arm 4. The support arm 5 is of circular cross-section and extends through a tubular slide body 6, the inner surface of which is so adapted to the outer surface of the support arm 5 that it can be displaced upwards and downwards on the
REFERENCES:
patent: 5224680 (1993-07-01), Greenstein et al.
patent: 5351676 (1994-10-01), Putman
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