Holding arm of a wound spreading device

Abstract

Holding arm (1-3) of a wound spreading device stably fixed to an operating table, with a fastening end (5) for adjustable arrangement in a holding device and with arm sections (6-14) for arranging holding clamps of wound spreading tools, wherein the holding arm (1-3) is rigidly arranged in a wound spreading device fixed to the operating table and is in each section bent and straightened,the straight sections serve as arm sections (6-14) for arranging retaining clips, and the retaining arm (1-3) is equipped with at least one rigid clamping device (21-25) for clamping a silicone strap of a disposable wound retractor, and conventional retaining clips and disposable wound retractors can be used alternatively or together side by side on it, and the clamping device (21-25) is arranged in the area of ​​the arm sections (6-14) for arranging the retaining clips and / or curved connecting sections (27-34) are arranged between the straight arm sections (6-14), and the clamping device (21-25) is arranged in a connecting section (27-34) between the arm sections (6-14), and a transverse slot of a clamping device (21-24) provided in the retaining arm (1-3) has a clamping area in the base of the slot for a silicone strap of a disposable wound retractor, which is radially covered by a projecting protective flap (40). is.,

Description

[0001] The invention relates to a holding arm of a wound spreading device with a fastening end for adjustable arrangement in a holding device and with arm sections for arranging holding clips, for example wound spreading hooks.

[0002] A quick-release clamp for a wound spreading device is known, WO 2010 / 072 212 A1, which has two mutually curved retaining arms, which are equipped at their attachment ends with ball joints for adjustable arrangement and whose retaining arms are circularly cylindrical in the area of ​​the retaining clamps for wound spreading tools to be attached to them.

[0003] However, such holding clips are often very bulky and take up a disproportionate amount of space on a holding arm. Smaller wound retractors could often be used for support, such as disposable wound retractors with elastic silicone straps, which, however, cannot be attached to the known quick-release clip. Such disposable wound retractors, on the other hand, can only be used in conjunction with a closed wound retractor frame, as disclosed in US 2007 / 0161866A1, and only with disposable wound retractors placed opposite each other to compensate for their tensile force. However, the known wound retractor frame itself does not allow for the attachment of known holding clips and also does not have a connection to an operating table.

[0004] A known stretching device for stretching an abdominal wall, WO 2017 / 021 187 A1, consists of a frame that can be fixed to an operating table, to which elastic traction elements can be knotted or clamped, but on which no mechanical holding clamps can be arranged as additional wound spreading tools.

[0005] A known surgical holder, JP 2008289679 A, ​​consists of a gallows-shaped mounting device, with a horizontal crossbar arranged on a telescopic vertical beam, the latter having several grooves for attaching surgical treatment instruments and being able to be positioned centrally over a surgical area.

[0006] A retraction device for laparoscopy is also known, US 2012 / 0316 593 A1, which has a Torkar tube piercing an abdominal wall with an internal Torkar needle with locking grooves on the tip side into which sutures connected with tissue retractors can be hooked in order not to unnecessarily damage adjacent tissue.

[0007] Also known is an instrument for external fixation; JP 2003180705 A, which is used for broken finger bones and has pins that are inserted into broken bone fragments and clamped and locked extracorporeally between disc bodies on the free side.

[0008] The object of the invention is to provide an improved holding arm for a wound spreading device, on which disposable wound hooks with elastic silicone straps can be attached in addition to the known holding clamps.

[0009] The solution to this problem is achieved in conjunction with the features of the preamble according to the invention in connection with the features of the characterizing part of the first claim, in particular by the fact that the holding arm is equipped with at least one rigid clamping device for clamping a silicone strap of a disposable wound hook.

[0010] This innovative design of a holding arm allows for the alternative or combined use of conventional holding clamps and disposable wound retractors familiar from other fields. This enables efficient and interdisciplinary use of such a new, multifunctional holding arm, which can also be used across departments, thus helping to save costs in the long term. This innovative holding arm allows for stable and optimal positioning of the surgical site, as the entire quick-release clamp, including its typically two holding arms, can be securely fixed to an operating table. This provides the surgeon with ample freedom of movement and allows for unobstructed work in a quiet operating field.

[0011] Another advantage of this inventive holding arm compared to a wound spreading device using only disposable wound retractors is that it does not require a closed wound spreading frame on which the disposable wound retractors must be used in pairs opposite each other to balance the mutual tensile forces and to keep the wound spreading frame centered over the surgical field.

[0012] According to the invention, the clamping device consists of a transverse slot radially inserted laterally into the holding arm, which in its further course extends in and / or against the longitudinal axis of its arm section and which can advantageously be arranged parallel to the longitudinal axis of its arm section or also obliquely to it, wherein, in the clamping of a silicone strap, a protective flap extending over the end of a transverse slot is formed by the design, which protects the clamping from penetrating moisture, such as blood splashes, which can lead to a reduction in friction to such an extent that the friction-related holding force is completely lost.

[0013] Further advantageous embodiments of the subject matter of the invention result from and in combination with the following dependent claims.

[0014] According to a particularly preferred embodiment of the invention, the clamping device or devices for such silicone straps are arranged in the area of ​​the arm sections for arranging the retaining clips and / or in a connecting section between two arm sections, so that, for example, retaining clips and disposable wound hooks can be used side by side on a long arm section without interfering with each other.

[0015] The rigid arrangement of the holding arms in a wound retractor fixed to the operating table also ensures that only single disposable wound retractors can be used, without the need to insert one on the opposite side. This grants the surgeon considerable freedom, as they no longer need to worry about compensating for the traction force applied by a disposable wound retractor on the opposite side of the surgical field, provided one is not required there. This also reduces the use of technical equipment and saves space around the surgical field.

[0016] In an advantageous embodiment of the invention and a holding arm curved in a plane, the clamping device advantageously consists of a clamping slot that is created in or on the holding arm and extends in the direction of the plane or at an angle to it, whereby it is also possible to arrange several and even different types of clamping slots in different directions on a holding arm, so that a surgeon can be given complete freedom in the use of the wound spreader hooks or disposable wound retractors.

[0017] The clamping slots can preferably have parallel or wedge-shaped tapered side walls, so that, depending on the material used for the elastic straps, a desired tensile force can be applied and held by the wound spreading device.

[0018] According to a further advantageous embodiment of the invention, the side walls of the clamping slots are equipped with a wave-shaped or zigzag-shaped surface structure, which further increases the clamping forces in the clamping slot, wherein such a surface structure can be introduced particularly during the production of the clamping slots if they are produced by a wire EDM process, which allows any conceivable shape of a clamping slot.

[0019] A further advantageous embodiment of the invention comprises a second type of clamping device consisting of a continuous longitudinal slot radially inserted into the holding arm, approximately in the form of a keyhole with an insertion opening for a silicone strip and with a narrowing clamping gap for clamping the silicone strip, thus enabling simple threading of the silicone strip and equally simple clamping by simply pulling the silicone strip laterally into the clamping gap, wherein this clamping gap can also be equipped with a wave-shaped or zigzag surface structure to improve the holding effect.

[0020] Some embodiments of the invention are described in more detail below with reference to the drawings. They show: Fig. 1 a spatial view of a first support arm, Fig. 2 a spatial view of a second support arm, and Fig. 3 a spatial view of a section of a third support arm.

[0021] The retaining arms 1-3 of a wound spreading device each have fastening ends 5 for adjustable arrangement in a holding device, which are all shown here as balls, but the fastening ends 5 can also be designed as round rods or truncated shafts in order to be held in corresponding clamps of a wound spreading device.

[0022] The retaining arms 1-3 are each curved in sections and straight in sections, thus spanning a plane, with the straight sections serving as arm sections 6-14 for the arrangement of retaining clamps and the clamping devices 20-25 also being arranged in these arm sections 6-14, which, as described in the text, could also be arranged in the connecting sections 27-34.

[0023] The clamping devices 21, as described in Fig. The sections shown in 1 consist of transverse slots radially inserted laterally from above into the retaining arm 1, each extending in the direction of the longitudinal axis of its respective arm section 6-9, whereas a retaining arm 2, as shown in the Fig. 2, has transverse slots which, in their further course, each have transverse slots extending in and against the longitudinal axis of their arm sections 10-12 towards the free end of the retaining arm 2 and towards the fastening end 5. These transverse slots are also directed into the plane spanned by the retaining arm 1;2, whereby they are, as shown in Fig. 3 shown, can also run perpendicular to it and may have different lengths or oblique orientations deviating from an orientation parallel to the longitudinal axis of the support arms 1-3.

[0024] The keyhole-shaped clamping device 25, as described in Fig.The clamping device 25, as shown in Figure 3, can also consist of a continuous longitudinal slot radially integrated into the holding arm 3, with a larger insertion opening for threading a silicone strap and a narrower clamping gap extending further from it for clamping this silicone strap. This clamping device 25 can also be equipped with a wave-shaped or zigzag-shaped surface structure to improve the clamping effect.

[0025] The transverse slots of the clamping devices 21-24, which are incorporated into the retaining arms 1-3, create a clamping area in the base of the slot for a silicone strap 38 of a disposable wound hook, wherein the silicone strap 38 is radially covered by a protruding protective flap 40 of the transverse slot and thus advantageously protects the clamping from penetrating moisture. Reference symbol list: 1 support arm 2 support arms 3 Support arm 5. Mounting end 6 arm section 7 arm section 8 arm section 9 arm section 10 arm section 11 arm section 12 arm section 13 arm section 14 arm section 21 Clamping device 22 Clamping device 23 Clamping device 24 Clamping device 25 other types of clamping devices 27 Connecting section 28 Connecting section 29 Connecting section 30 Connecting section 31 Connecting section 32 Connecting section 33 Connecting section 34 Connecting section 38 silicone reins 40 protective flap

Claims

[1] Holding arm (1-3) of a wound spreading device stably fixed to an operating table, with a fastening end (5) for adjustable arrangement in a holding device and with arm sections (6-14) for arranging holding clips of wound spreading tools, wherein the holding arm (1-3) is rigidly arranged in a wound spreading device fixed to the operating table and is bent and straight in sections,the straight sections serve as arm sections (6-14) for arranging retaining clips, and the retaining arm (1-3) is equipped with at least one rigid clamping device (21-25) for clamping a silicone strap of a disposable wound retractor, and conventional retaining clips and disposable wound retractors can be used alternatively or together side by side on it, and the clamping device (21-25) is arranged in the area of ​​the arm sections (6-14) for arranging the retaining clips and / or curved connecting sections (27-34) are arranged between the straight arm sections (6-14), and the clamping device (21-25) is arranged in a connecting section (27-34) between the arm sections (6-14), and a transverse slot of a clamping device (21-24) provided in the retaining arm (1-3) has a clamping area in the base of the slot for a silicone strap of a disposable wound retractor, which is radially covered by a projecting protective flap (40). is., [2] Holding arm (1-3) according to the preceding claim, characterized by , that it spans a plane, is curved section by section in the area of ​​the connecting sections (27-37) and the clamping device (21-25) is formed by a clamping slot which is created in or on the holding arm (1-3) and which extends in the direction of the plane or at an angle to it. [3] Holding arm (1-3) according to claim 2, characterized by , that the clamping slot of the clamping device (21-25) has parallel or wedge-shaped tapered side walls. [4] Holding arm (1-3) according to claim 2, characterized by , that the clamping slot of the clamping device (21-25) has side walls which have a wavy or zigzag surface structure. [5] Holding arm (1-3) according to one of the preceding claims, characterized by, that the clamping device (21-24) consists of the transverse slot radially laterally inserted into the holding arm (1-3), which in its further course is inserted in and / or against the longitudinal axis of its arm section (6-14). [6] Holding arm (1-3) according to claim 5, characterized by that the transverse slot is arranged parallel to the longitudinal axis of its arm section (6-14) or runs obliquely to it. [7] Holding arm (1-3) according to any one of the aforementioned claims 1-4, characterized by , that another type of clamping device (25) consists of a continuous longitudinal slot radially inserted into the retaining arm (1-3) and has an insertion opening for a silicone strap as well as a narrower clamping gap for clamping the silicone strap.

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