US20140087345A1 - Surgical training model for laparoscopic procedures - Google Patents
Surgical training model for laparoscopic procedures Download PDFInfo
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- US20140087345A1 US20140087345A1 US14/036,129 US201314036129A US2014087345A1 US 20140087345 A1 US20140087345 A1 US 20140087345A1 US 201314036129 A US201314036129 A US 201314036129A US 2014087345 A1 US2014087345 A1 US 2014087345A1
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- cuff
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/28—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for medicine
- G09B23/285—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for medicine for injections, endoscopy, bronchoscopy, sigmoidscopy, insertion of contraceptive devices or enemas
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B23/00—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes
- G09B23/28—Models for scientific, medical, or mathematical purposes, e.g. full-sized devices for demonstration purposes for medicine
- G09B23/30—Anatomical models
Definitions
- This application is generally related to surgical training tools, and in particular, to simulated tissue structures and models for teaching and practicing various surgical techniques and procedures related but not limited to laparoscopic, endoscopic and minimally invasive surgery.
- Laparoscopic or endoscopic minimally invasive surgery requires an increased level of skill compared to open surgery because the target tissue is not directly observed by the clinician.
- the target tissue is observed on monitors displaying a portion of the surgical site that is accessed through a small opening. Therefore, clinicians need to practice visually determining tissue planes, three-dimensional depth perception on a two-dimensional viewing screen, hand-to-hand transfer of instruments, suturing, precision cutting and tissue and instrument manipulation.
- models simulating a particular anatomy or procedure are placed in a simulated pelvic trainer where the anatomical model is obscured from direct visualization by the practitioner. Ports in the trainer are employed passing instruments to practice techniques on the anatomical model hidden from direct visualization.
- Simulated pelvic trainers provide a functional, inexpensive and practical means in place of expensive cadaver labs to train surgeons and residents the basic skills and typical techniques used in laparoscopic surgery such as grasping, manipulating, cutting, knot tying, suturing, stapling, cauterizing as well as how to perform specific surgical procedures that utilize these basic skills. Simulated pelvic trainers are also effective sales tools for demonstrating medical devices required to perform these laparoscopic procedures.
- the model is then disposed inside a simulated laparoscopic environment such as a laparoscopic trainer in which it is at least partially obscured from direct visualization.
- a camera and monitor provide visualization to the practitioner.
- it is furthermore desirable that such a model permits repeatable practice with ease, speed and cost savings.
- a surgical training device for training laparoscopic surgical skills.
- the training device includes a simulated tissue model having a first simulated tissue.
- the first simulated tissue has a tubular form comprising a first central lumen having an inner surface interconnecting an opening at the proximal end and an opening at a distal end. At least the distal end of the first simulated tissue is compressible.
- the model further includes a first holder having a proximal end and a distal end. The first holder is connected to the first simulated tissue such that the opening at the proximal end of the first simulated tissue is stretched over the first holder locating at least a part of the first holder inside the first central lumen of the first simulated tissue.
- the first simulated tissue is connected to the first holder such that the opening at the distal end of the first simulated tissue is distal to the distal end of the first holder by a length defining a first overhanging portion of the first simulated tissue.
- the overhanging portion simulates a vaginal cuff which is sutured or stapled closed by the practitioner.
- the surgical training device includes a first simulated tissue having a tubular form comprising a first central lumen interconnecting an opening at a proximal end and an opening at a distal end.
- the training device further includes a first holder having a proximal end and a distal end.
- the first holder is connected to the first simulated tissue such that the opening at the proximal end of the first simulated tissue is stretched over the first holder locating the first holder at least partially inside the first central lumen of the first simulated tissue.
- the training device includes a second holder having a proximal end and a distal end.
- the second holder is connected to the first simulated tissue such that the opening at the distal end of the first simulated tissue is stretched over the second holder locating the second holder at least partially inside the first central lumen at the distal end of the first simulated tissue.
- the distal end of the first holder is spaced apart from the distal end of the second holder by a length defining a gap that is spanned by the first simulated tissue.
- a surgical training device includes an elongate first simulated tissue made of flexible material and having an outer surface and an inner surface.
- the inner surface defines a lumen interconnecting an opening at a distal end and an opening at a proximal end.
- the first simulated tissue is compressible such that the distal end of the lumen is closable.
- the training device further includes a base having an upper surface and a lower surface and a first holder having a proximal end and a distal end. The proximal end of the first holder is connected to the upper surface of the base and extends upwardly from the base.
- the first simulated tissue is connected to the first holder such that the proximal end of the first simulated tissue is connected to the first holder and the distal end of the first simulated tissue is distal to the distal end of the first holder by length defining a first overhanging portion of the first simulated tissue.
- the first overhanging portion maintains the opening at the distal end when connected to the first holder and the first overhanging portion is compressible to close the distal opening.
- a surgical training device includes an elongated simulated tissue structure made of a flexible material configured to hold surgical sutures and having a thickness between an outer surface and an inner surface.
- the inner surface of the simulated tissue structure defines a central lumen interconnecting an opening at a distal end and an opening at a proximal end.
- the simulated tissue structure has a circular or elliptical cross-section and an elastic tubular form that maintains the lumen opening when unstressed and is compressible under pressure to close the lumen.
- the simulated tissue structure is configured to be connected to a holder by being placed over the holder.
- the simulated tissue structure is configured to be connected to a holder by stretching the proximal end of the simulated tissue structure onto the distal end of the holder.
- the surgical training device further includes a holder having a distal end and a proximal end.
- the holder is sized and configured to fit inside the lumen of the simulated tissue structure such that the proximal end of the simulated tissue structure is stretched to insert the holder into the lumen and allowed to elastically contract onto the holder to maintain the simulated tissue structure connected to the holder.
- the simulated tissue structure is connected to the holder such that the opening at the distal end of the simulated tissue structure is distal to the distal end of the holder by a length defining an overhanging portion.
- the opening at the distal end of the overhanging portion is closable by compressing opposite sides of the simulated tissue structure.
- the opening at the distal end of the overhanging portion is closable by passing sutures through the overhanging portion to bring opposite sides of the simulated tissue structure together.
- the surgical training device includes a second elongated simulated tissue structure sized and configured to concentrically fit inside the simulated tissue structured.
- the second simulated tissue structure is made of flexible material and configured to hold surgical sutures and having a thickness between an outer surface and an inner surface.
- the inner surface of the second simulated tissue structure defines a central lumen interconnecting an opening at a distal end and an opening at a proximal end.
- the surgical training device further including clips configured to hold the simulated tissue structure connected to a base.
- FIG. 1 illustrates a top perspective view of a surgical training device according to the present invention.
- FIG. 2 illustrates a side perspective, partially transparent view of a cuff model with two cuffs according to the present invention.
- FIG. 3 illustrates a side perspective view of a cuff model showing a base, connector and cuff holder without a cuff according to the present invention.
- FIG. 4 illustrates a side view of a cuff model according to the present invention.
- FIG. 5 illustrates a side view of a cuff model according to the present invention.
- FIG. 6 illustrates a side view of a cuff model according to the present invention.
- FIG. 7 illustrates a side perspective view of a single cuff according to the present invention.
- FIG. 8 illustrates a top perspective view of a cuff model without one or more cuffs according to the present invention.
- FIG. 9 illustrates a top perspective, partially transparent view of a cuff model with two cuffs according to the present invention.
- FIG. 10 illustrates a side, partially transparent view of a cuff model with four cuffs according to the present invention.
- FIG. 11 illustrates a side, partially transparent view of a cuff model with one cuff according to the present invention.
- a surgical training device 10 that is configured to mimic the torso of a patient such as the abdominal region is shown in FIG. 1 .
- the surgical training device 10 provides a body cavity 12 substantially obscured from the user and configured for receiving simulated or live tissue or a training model of the like described in this invention.
- the body cavity 12 is accessed via a tissue simulation region 14 that is penetrated by the user employing devices to practice surgical techniques on the tissue or organ model found located in the body cavity 12 .
- the body cavity 12 is shown to be accessible through a tissue simulation region, a hand-assisted access device or single-site port device may be alternatively employed to access the body cavity 12 .
- An exemplary surgical training device is described in U.S. patent application Ser. No. 13/248,449 entitled “Portable Laparoscopic Trainer” filed on Sep. 29, 2011 and incorporated herein by reference in its entirety.
- the surgical training device 10 is particularly well suited for practicing laparoscopic or other minimally invasive surgical procedures.
- the surgical training device 10 includes a top cover 16 connected to and spaced apart from a base 18 by at least one leg 20 .
- FIG. 1 shows a plurality of legs 20 .
- the surgical training device 10 is configured to mimic the torso of a patient such as the abdominal region.
- the top cover 16 is representative of the anterior surface of the patient and the space between the top cover 16 and the base 18 is representative of an interior of the patient or body cavity where organs reside.
- the surgical trainer 10 is a useful tool for teaching, practicing and demonstrating various surgical procedures and their related instruments in simulation of a patient undergoing a surgical procedure. Surgical instruments are inserted into the cavity 12 through the tissue simulation region 14 as well as through pre-established apertures 22 in the top cover 16 .
- the base 18 includes a model-receiving area 24 or tray for staging or holding a simulated tissue model or live tissue.
- the model-receiving area 24 of the base 18 includes frame-like elements for holding the model (not shown) in place.
- a clip attached to a retractable wire is provided at locations 26 . The retractable wire is extended and then clipped to hold the tissue model in position substantially beneath the tissue simulation region 14 .
- tissue model Other means for retaining the tissue model include a patch of hook-and-loop type fastening material (VELCRO®) affixed to the base 18 in the model receiving area 24 such that it is removably connectable to a complementary piece of hook-and-loop type fastening material (VELCRO®) affixed to the model.
- VELCRO® hook-and-loop type fastening material
- a video display monitor 28 that is hinged to the top cover 16 is shown in a closed orientation in FIG. 1 .
- the video monitor 28 is connectable to a variety of visual systems for delivering an image to the monitor.
- a laparoscope inserted through one of the pre-established apertures 22 or a webcam located in the cavity and used to observe the simulated procedure can be connected to the video monitor 28 and/or a mobile computing device to provide an image to the user.
- audio recording or delivery means may also be provided and integrated with the trainer 10 to provide audio and visual capabilities.
- Means for connecting a portable memory storage device such as a flash drive, smart phone, digital audio or video player, or other digital mobile device is also provided, to record training procedures and/or play back pre-recorded videos on the monitor for demonstration purposes.
- connection means for providing an audio visual output to a larger screen other than the monitor is provided.
- the top cover 10 does not include a video display but includes means for supporting a laptop computer, a mobile digital device or tablet such as an IPAD® and connecting it by wire or wirelessly to the trainer.
- the top cover 16 When assembled, the top cover 16 is positioned directly above the base 18 with the legs 20 located substantially around the periphery and interconnected between the top cover 16 and base 18 .
- the top cover 16 and base 18 are substantially the same shape and size and have substantially the same peripheral outline.
- the internal cavity is partially or entirely obscured from view.
- the top cover 16 is removable from the legs 20 which in turn are removable or collapsible via hinges or the like with respect to the base 18 . Therefore, the unassembled trainer 10 has a reduced height that makes for easier portability.
- the surgical trainer 10 provides a simulated body cavity 12 that is obscured from the user.
- the body cavity 12 is configured to receive at least one surgical model accessible via at least one tissue simulation region 14 and/or apertures 22 in the top cover 16 through which the user may access the models to practice laparoscopic or endoscopic minimally invasive surgical techniques.
- FIG. 2 A cuff model 30 according to the present invention is shown in FIG. 2 .
- the cuff model 30 is configured to be placed inside the surgical training device 10 described above or other surgical trainer similar to the one described above.
- the cuff model 30 includes a base 32 , a connector 34 , a cuff-holder 36 and at least one cuff 38 .
- FIG. 2 illustrates two cuffs 38 a and 38 b arranged such that one cuff 38 b is placed over another cuff 38 a.
- FIG. 3 illustrates the cuff model 30 with the cuffs 38 removed showing the base 32 , connector 34 and cuff holder 36 .
- the base 32 of the cuff model 30 is a platform that serves as a bottom support for the rest of the model 30 and it is sized and configured such that the model does not tip over.
- the platform is made of any material such as metal or plastic.
- the base 32 is of sufficient heft to maintain the stability of the model 30 in the upright position while being manipulated by a user.
- the model 30 is sized and configured to be placed into the body cavity 12 of the surgical trainer 10 in the location of the model receiving area 24 .
- the underside of the base 32 is provided with means to affix the cuff model 30 inside the surgical trainer 10 .
- Such means to affix the cuff model 30 inside the trainer 10 include but are not limited to adhesive, suction cup, snap-fit, magnet, and a hook-and-loop type fastener material attached to the bottom surface of the base 32 and configured to connect with a complementary hook-and-loop type fastener material or adhesive attached to the base 18 of the surgical trainer 30 .
- the connector 34 is an elongate arm that separates the cuff holder 36 from the base 32 . At a first end, the connector 34 is connected to the base 32 such that it extends vertically upwardly from the base. At a second end of the connector 34 , the connector 34 is connected to the cuff holder 36 .
- the connector 34 is a flexible gooseneck such that the position of the cuff holder 36 can be adjusted with the position being maintained by the gooseneck connector 34 following the adjustment. In one variation, the connector 34 is flexible and in another variation the connector 34 is rigid. In yet another variation that is shown in FIG.
- a rigid connector 34 is connected to the base 32 via a ball joint or swivel bearing 40 such that the rigid connector 34 is movable in manner that permits adjustment yet maintains the cuff holder 36 in the new position following the adjustment.
- the connector 34 may be rotatable with respect to the base 32 .
- the connector 34 may be flimsy such that it does not hold an adjusted position but has to be maintained in the desired position by the user.
- the connector may be connected directly to the base 18 of the trainer 10 .
- FIG. 5 Another variation of the cuff model 30 is shown in FIG. 5 in which the base 32 includes a vertical portion 42 . From the upstanding vertical portion 42 , the connector 34 extends substantially laterally as shown in FIG. 5 .
- the connector 34 is a flexible gooseneck-type connector 32 or a rigid connector 34 that supports the cuff holder 36 .
- FIG. 5 shows the cuff holder 36 without one or more cuffs 38 .
- the connector 34 may also be rigid or flexible and capable of maintaining its position relative to the base or not. Also, a swivel bearing may be employed to connect the connector to the vertical portion 42 .
- the base 32 includes a vertical portion 42 extending upwardly. From the upstanding vertical portion 42 , the cuff holder 36 is attached directly to the base 32 . In this variation, there is no connector 34 that would impart flexibility or movability to the cuff holder 36 .
- the cuff holder 34 is attached with adhesive or other fastener means directly to the base 32 .
- the connector is an elongate pin or the like onto which the cuff holder 36 is mounted in a fixed or movable relationship in which the cuff holder 36 angulates, rotates or moves relative to the base 32 .
- the cuff holder 36 can be attached to the horizontal portion of the base 32 without the connector 34 . Without the connector 34 , the cuff holder 36 may be connected to the base 32 at an angle with respect to the base 32 .
- the cuff holder 36 is a structure configured to hold the cuff 38 in a desired configuration.
- the cuff holder 36 is connected to the connector 34 or directly to the base 32 as described above.
- the cuff holder 36 serves as a mount for one or more cuffs 38 to be placed over the cuff holder 36 .
- the cuff holder 36 is cylindrical in shape and is made of any suitable material such as plastic or metal in solid or hollow construction.
- the proximal end of the cuff holder 36 that connects to the connector 34 may include connecting means or socket for receiving and attaching to the connector 34 .
- the cuff holder 36 may attach to the connector 34 such that the cuff holder 36 rotates, angulates, twists or moves with respect to the connector 34 .
- the cuff holder 36 is not circular in cross-section but has an elliptical cross-section.
- the major axis of the elliptical cross-section of the cuff holder 36 is approximately 1.75 inches and the minor axis is approximately 1.0 inch.
- the major axis of the elliptical cross-section of the cuff holder 36 is approximately 2.25 inches and the minor axis is approximately 1.5 inches.
- the cuff holder 36 can have any cross-sectional shape including any closed curve or polygonal shape depending upon the surgical skill to be practiced and the purpose of the tissue simulation.
- the cuff holder 36 is approximately 1.5 inches long.
- the cuff holder 36 is removable from the base or connector 34 and interchangeable with another cuff holder 36 having a different length or cross-sectional shape or size.
- the cuff holder 36 may be connected by any removable means such as snap-fit, friction-fit, or threaded onto the connector 34 .
- the cuff 38 has a tubular form having a central lumen interconnecting an open proximal end and an open distal end. At least a portion of the distal end of the cuff 38 is resilient and compressible such that the perimeter of the distal end can be pressed together or drawn into juxtaposition by the user employing clamps or sutures or staples or simply by pressing the end to close the lumen and distal opening.
- the material of the cuff 38 is flexible and preferably made of polymeric material.
- the cuff may include a four-way stretch, porous fabric material such as nylon with a silicone over mold formed into a hollow cylindrical, tubular shape.
- the thickness of the cuff 38 is approximately 1-5 mm and the cuff 38 is approximately 2-4 inches in length and could be longer such as up to 6 inches. Generally, the cuff 38 is longer in length than the cuff holder 36 such that at least a portion of the cuff 38 extends beyond the free distal end 44 of the cuff holder 36 . Since the material of the cuff 38 is stretchable, it is sized to stretch over the cuff holder 36 .
- the diameter of the cuff 38 closely matches the diameter of the cuff holder 36 with the cuff holder 36 being the same or slightly larger in diameter than the diameter of the cuff 38 such that the cuff 38 is placed in tension when stretched over the cuff holder 38 and thereby held removably connected to the cuff holder 38 .
- a cuff 38 having an elliptical cross-section is also within the scope of the present invention.
- the major axis of the elliptical cross-section of the cuff 38 is approximately 1.75 inches and the minor axis is approximately 1.0 inch. In another variation, the major axis of the elliptical cross-section of the cuff 38 is approximately 2.25 inches and the minor axis is approximately 1.5 inches.
- a cuff 38 having an elliptical cross-section may be placed over a cuff holder 36 that has a circular cross-section or an elliptical cross-section.
- the silicone over mold provides a realistic tissue feel and the embedded fabric material of the cuff prevents tearing of the material which is especially important as the user practices pulling sutures through the cuff 38 .
- the cuff 38 may be made of any polymer, including silicone or a thermoplastic elastomer, styrenic block copolymer such as KRATON® or hydrogel.
- the cuff 38 is dyed any color, typically white or pink, to mimic real tissue.
- a first cuff 38 a is selected as white and placed over the cuff holder 36 and the second cuff 38 b is red or pink in color and placed over the first cuff 38 a such that the first cuff 38 a is inside the second cuff 38 b.
- the use of two colors mimics certain real tissues of the human body and also allows for contrast and distinction between the two cuff layers.
- the outside layer being red or pink does not get washed out by light when viewed via a laparoscopic camera on a monitor. Since it is red or pink it does not reflect the light while viewed under the scope as a white layer would.
- any color can be employed for the two layers so long as contrast is created between the layers when viewed via a monitor.
- one layer is a light colored layer, preferably the inner cuff layer and the outer cuff layer is preferably made of a darker color. Contrasting layers is not required.
- a single cuff 38 can be formed to mimic a two cuffs, one placed inside the other, and the single cuff can be dyed with a gradient of color from dark to light going from outside to the inside of the cuff 38 .
- the distal end of one or more cuffs 38 a, 38 b may include an uneven edge for increased difficulty in suturing the ends together requiring the practitioner to vary the suture lengths, pull and stretch the cuffs accordingly.
- the uneven distal ends of the cuffs 38 may include scallops that extend inwardly from the distal end of the cuff to create a wavy pattern at the distal end.
- two cuffs 38 a, 38 b are employed, one on top of the other, their respective distal ends are uneven also with respect to each other.
- one cuff may have a straight edge and the other cuff may have an uneven distal edge or both cuffs may have uneven distal edges. For a simple suturing exercise, the distal ends are even.
- a single cuff 38 that is placed in tension and stretched over the cuff holder 36 .
- the cuff is moved towards the connector 34 until a desirable amount or length of cuff 38 material overhangs or extends beyond the distal or free end 44 of the cuff holder 36 .
- the cuff 38 extending beyond the free end 44 of the cuff holder 36 is shown in FIGS. 2 and 4 .
- the user practices closing the open end of the cylindrical cuff 38 that overhangs the distal end 44 of the cuff holder 36 with sutures or staples.
- the overhanging portion of the cuff 38 advantageously mimics certain real tissue structures such as a resected bowel and the vaginal opening and allows the user to practice whatever suturing technique they would like to practice in the laparoscopic or endoscopic minimally invasive procedure in which the cuff model 30 is hidden from direct visualization by the surgeon having been placed inside the surgical trainer 10 .
- the cuff 38 may be any size and diameter depending upon whether the simulation is for a large intestine, small intestine, colon, vaginal cuff, or vascular structure.
- a surgeon can practice the suturing necessary to be performed following a laparoscopic hysterectomy.
- Laparoscopic gynecological surgeons perform total laparoscopic hysterectomies in which the uterus is removed requiring closure of the vaginal vault.
- the present cuff model 30 and in particular, the overhang portion of the cuff 38 , mimics the entry to the vaginal vault that needs to be closed by suturing following a hysterectomy. The surgeon can thus use the model to practice suturing in this special procedure.
- two cylindrical cuffs 38 a and 38 b to mimic the vaginal vault which comprises of two tissue layers, an inner layer and an outer layer which are sutured closed.
- the inner cuff 38 a may represent a mucosa layer and the outer cuff 38 b may represent the fascia or peritoneum for practicing surgical skills.
- two cuffs 38 a and 38 b are placed over the cuff holder 36 in tension.
- a first cuff 38 a having a white color is stretched slightly and pulled onto and over the cuff holder 36 leaving an overhang portion described above.
- a second cuff 38 b that is red or pink in color is place over the first cuff 38 a by stretching it slightly and pulling it over the first cuff 38 and onto the cuff holder 36 .
- a first white cuff 38 a is placed inside a second red or pink cuff 38 b and then both are simultaneously stretched slightly and then pulled over the cuff holder 36 simultaneously.
- the stretching of the cuffs 38 a and 38 b over the cuff holder 36 is what holds the cuff layer 38 a and 38 b in place and movably connected to the cuff holder 36 .
- the two cuffs 38 a and 38 b are glued together with or without a setback at the distal end of the top layer 38 b.
- the adhesive is applied proximally from the distal ends such that the two layers 38 a, 38 b are separable from each other at the distal end.
- the overhang portion includes an inner cuff 38 a and an outer cuff 38 b and their distal ends extending beyond the distal end 44 of the cuff holder 36 by a distance of approximately 0.25 inches to 1.0 inches.
- the length of the overhang portion may vary and is selectable by the user by moving the cuff 38 along the cuff holder 36 to adjust the length of the overhang.
- the cuff holder 36 is configured to maintain the overhang portion of a cuff 38 of substantially the same cross-sectional shape as the cuff holder 36 in a substantially open shape.
- a cuff 38 having a circular cross-section when mounted on a cuff holder 38 having a circular cross-section will have an overhang portion that retains an opening that is substantially circular at the distal end. If a more elliptically-shaped overhang portion is desired an elliptically shaped cuff can be mounted on a cuff holder having an elliptical cross-section.
- the second or outer cuff 38 b is placed over the first cuff 38 a such that the distal end of the second or outer cuff 38 b is set back approximately 1 ⁇ 3 cm from the distal end of the first or inner cuff 38 a as shown in FIGS. 2 and 4 .
- An example of a two cuff construct includes a tubular first cuff 38 a having a substantially elliptical cross-section with a major inner axis dimension of approximately 1.75 inches and a minor inner axis dimension of approximately 0.40 inches with a thickness of approximately 0.125 inches and approximately 3.0 inches long.
- the second or outer cuff 38 b is also tubular having an elliptical cross-section and a thickness of approximately 0.05-0.08 inches and an overall length of approximately 2.80 inches.
- the outer cuff 38 b has a major inner axis of approximately 2.0 inches and a minor inner axis dimension of approximately 0.66 inches.
- the distal end of the first cuff 38 a extends approximately 0.3-0.5 cm beyond the distal end of the second cuff 38 b.
- the shorter length of the second cuff 38 b forces the practitioner to pull the distal end of the second cuff 38 b into alignment with the distal end of the first cuff 38 a for suturing both ends together allowing the user to practice keeping the outer layer in tension while placing the suture.
- the outer layer 38 b is thinner than the inner layer 38 b forcing the user to regulate the tension appropriately so that the suture does not pull through the cuff material.
- the inner and outer cuff layers 38 a and 38 b are substantially identical made with the same materials or alternatively of different materials.
- one or more of the layers may omit the mesh support.
- the thicknesses of the layers may be the same (approximately 1/16 inches thick). If cuffs 38 of circular cross-sections are employed, the inner or first cuff 38 a has a diameter of approximately 1.0 inch and the outer or second cuff 38 b has a diameter of approximately 1.125 inches.
- the cuff holder 36 is approximately 1.125 inches in diameter which is the same diameter of the outer or second cuff 38 b.
- the cuff holder 36 can be articulated using the flexible connector 34 to position the proximal open end of the cuffs 38 that suits the clinician.
- the clinician can practice manipulating the position of the cuff holder 36 to adequately suit his needs.
- the user sutures or staples the cuff closed.
- the position of the cuff can be manipulated during the closure by the clinician or assistant in order to obtain the optimal position for the surgeon to perform suturing.
- the articulating connector arm 34 allows for different positions or adjustments of the cuff 38 .
- the user can practice making individual stitches each closed by an intracorporeal or extracorporeal knot (interrupted suture) or a running stitch which has a knot at the beginning and end but no knots in the middle. Additionally, the user can practice using a barbed suture that does not require knots of any type and runs the length of the open end of the overhanging cuff. Most often the user will close both inner and outer cuff layers 38 a and 38 b at the same time or they may practice closing the first or inner cuff 38 a layer first and then closing the second or outer cuff 38 b layer.
- the surgeon can also practice performing a leak test to see if the suture cuff has been adequately closed by pouring water into the inner cuff to see if the water holds inside the cuff.
- the leak test after the layers are sutured closed, the user would remove the cuff from the cuff-holder and pour water in the open end of the cuff to see if the sutured end leaks. The water should remain contained within the cuff. If leaking is observed the suturing requires improvement.
- the same leak test may be performed after the cuff is stapled.
- the user can cut off the end that was sutured or stapled removing it from the remainder of the at least one cuff and if necessary slide the at least one cuff 38 towards the free end 44 of the cuff holder 36 to create another overhang portion or selectably increase or adjust the length of the one or more overhang portions to practice suturing again.
- This process can be repeated until there is insufficient cuff 38 to remain stretched onto the cuff holder 36 at which point a new cuff 38 or cuffs 38 can be placed over the cuff holder 36 for further practice.
- the cuff 38 is designed as a consumable component which is approximately 3 inches long and may be longer which allows for multiple uses before needing a replacement.
- the user sutures the cuff closed.
- the distal portion of the cuff 38 is cut off so that the remaining length of the cuff can be used several more times before it needs to be replaced.
- the cuff model 30 advantageously isolates the step of suturing a cylindrical opening, in particular, the laparoscopic suturing of the vaginal cuff in a representative model for the purpose of repeated practice.
- FIG. 8 there is shown another variation of the cuff model 50 in which two cuff models 48 , 49 each of the like described above are positioned substantially opposite from each other.
- the cuff model 50 is configured to be placed in the surgical training device 10 described above and shown in FIG. 1 or other surgical trainer similar to the one described above.
- the cuff model 50 includes two cuff models 48 , 49 connected to a base 52 in substantially opposite relation to each other.
- the first cuff model 48 includes a first connector 54 connected to the base 52 at one end and to a first cuff holder 58 at the other end.
- the second cuff model 49 includes a second connector 56 connected to the base 52 at one end and to a second cuff holder 60 at the other end.
- At least one cuff 62 is placed on each cuff holder 58 , 60 as shown in FIG. 9 which illustrates cuffs 62 a and 62 b placed on the first and second cuff holders 58 , 60 , respectively
- the base 52 of the cuff model 50 is a platform that serves as a bottom support for the both cuff models 48 , 49 and it is sized and configured such that the model does not tip over.
- the platform is made of any material such as metal or plastic.
- the base 52 is of sufficient heft to maintain the stability of the model 50 in the upright position while being manipulated by a user.
- the model 50 is sized and configured to be placed into the body cavity 12 of the surgical trainer 10 in the location of the model receiving area 24 .
- the underside of the base 52 is provided with means to affix the cuff model 50 inside the surgical trainer 10 .
- Such means to affix the cuff model 50 inside the trainer 10 include but are not limited to adhesive, suction cup, magnet, snap-fit, and a hook-and-loop type fastener material attached to the bottom surface of the base 52 and configured to connect with a complementary hook-and-loop type fastener material attached to the base 18 of the surgical trainer 10 .
- first connector 54 and a second connector 56 of the like described above with respect to connector 34 connected to the base 52 of the cuff model 50 is a first connector 54 and a second connector 56 of the like described above with respect to connector 34 .
- the connectors 54 , 56 are elongate arms that separate each cuff holder 58 , 60 , respectively, from the base 52 .
- the connectors 34 are connected to the base 52 such that each extends vertically upwardly away from the base 52 .
- each connector 54 , 56 is connected to the cuff holders 58 , 60 .
- Each connector 54 , 56 is a flexible gooseneck arm such that the position of the cuff holders 58 , 60 can be adjusted with the position being maintained by the gooseneck connectors 54 , 60 following the adjustment.
- At least one of the connectors 54 , 56 is flexible and in another variation the connectors 54 , 56 are both rigid.
- rigid connectors 54 , 56 are connected to the base 52 via a ball joint or swivel bearing such as described and shown in FIG. 4 such that the rigid connectors 54 , 56 are movable in manner that permits adjustment yet maintains the cuff holders 58 , 60 in the new position following the adjustment.
- At least one of the connectors 54 , 56 is attached to one or more vertical portions of the base 52 as shown in FIG. 5 such that from the upstanding vertical portion the connectors 54 , 56 extend substantially laterally toward each other and in opposition from each other.
- the cuff holders 58 , 60 may be connected directly to the base 52 and in another variation, one or more of the cuff holders 58 , 60 are connected directly the base 18 of the trainer 10 and yet in another variation no cuff holders 58 , 60 or connectors 54 , 56 are employed and the cuffs are connected to base 18 of the trainer 10 with clips 26 connected to the base.
- the connectors 54 , 56 are flexible gooseneck-type connectors or rigid connectors that support cuff holders 58 , 60 , respectively.
- FIG. 8 shows cuff holders 58 , 60 without one or more cuffs 62 .
- the base 52 includes two opposed vertical portions extending upwardly of the like shown in FIG. 6 . From the upstanding vertical portion, the cuff holders 36 are attached directly to the vertical portions and extend laterally toward each other and into opposition from each other. The cuff holders 58 , 60 are attached with adhesive or other fastener means directly to the base 52 .
- the connectors 54 , 56 are elongate pins onto which the cuff holders 58 , 60 are mounted in a movable or fixed relationship. Of course, the cuff holders 58 , 60 can be attached to the horizontal portion of the base 52 without the connectors 54 , 56 .
- the cuff holders 58 , 60 are each configured to hold at least one cuff or sleeve 62 in a desired configuration.
- the cuff holder 58 is connected to the connector 54 or directly to the base 52 as described above.
- Cuff holder 60 is connected to connector 56 or directly to the base 52 .
- the cuff holders 58 , 60 serve as a mounts for one or more cuffs 62 to be placed on each cuff holder 58 , 60 .
- the cuff holders 58 , 60 are cylindrical in shape and are made of any suitable material such as plastic or metal in solid or hollow construction.
- the end of the cuff holder that connects to the connector may include connecting means or socket for receiving and attaching to the connector.
- the cuff holder is not circular in cross-section but has an elliptical cross-section.
- the cuff holders can have any cross-sectional shape including any closed curve or polygonal shape.
- Each of the cuff holders 58 , 60 are approximately 1.5 inches long.
- the typical cuff 62 used for cuff model 50 is the same as used for cuff model 30 and shown and described in FIG. 7 .
- the cuff material includes a four-way stretch, porous fabric material such as nylon or other mesh with a silicone over mold formed into a hollow cylindrical, tubular shape.
- the thickness of the cuff 62 is approximately 1-5 mm and the cuff 62 is approximately 3-4 inches in length and could be longer such as up to 6 inches. To simulate the thickness of an intestine, the cuff is larger approximately 1 ⁇ 8 inches thick.
- the cuff 62 is generally longer in length than the cuff holders 58 , 60 such that at least a portion of the cuffs 62 a, 62 b extends beyond the free ends 44 a, 44 b of the cuff holders 58 , 60 , respectively, as seen in FIG. 9 . Since the material of the cuffs 62 a, 62 b is stretchable, it is sized to stretch over cuff holders 58 , 60 , respectively.
- the diameter of the cuffs 62 a, 62 b closely match the diameter of the cuff holders 58 , 60 , respectively, with the cuff holders 58 , 60 being the same or slightly larger in diameter than the diameter of the cuffs 62 a, 62 b, respectively, such that the cuffs 62 a, 62 b are placed in tension stretched over the cuff holders 58 , 60 .
- the silicone over mold provides a realistic tissue feel and the fabric material of the cuff prevents tearing of the material which is especially important as the user practices pulling sutures through the cuff 62 .
- the cuff 62 is dyed any color, typically white or pink, to mimic real tissue.
- a first cuffs 62 a and 62 b are selected as white and placed over the cuff holders 58 , 60 , respectively, and the second cuffs 62 c, 62 d are selected as red or pink in color and placed over the first cuffs 62 a, 62 b, respectively.
- the use of two colors mimics certain real tissues of the human body and also allows for contrast and distinction between the two cuff layers.
- the outside layer being red or pink does not get washed out by light when viewed via a laparoscopic camera on a monitor. Since it is red or pink it does not reflect the light while viewed under the scope as a white layer would.
- one layer may be formed to resemble a two-layer model and dyed with a gradient of color from darker at the outer surface to lighter color at the inner surface.
- the cuffs 62 a, 62 b, 62 c, 62 d may have a circular or elliptical cross-section and may be placed over cuff holders 58 , 60 having circular or elliptical cross-sections.
- a single cuff 62 a that is cylindrical in shape having a circular or elliptical cross-section is placed in tension, stretched over the first cuff holder 58 which may have a circular or elliptical cross-section.
- the cuff 62 a is moved towards the connector 48 until a desirable amount of cuff 62 a material overhangs or extends beyond the distal or free end 44 a of the cuff holder 58 .
- a second single cuff 62 b that is cylindrical in shape is placed in tension, stretched over the second cuff holder 60 .
- the cuff 62 b is moved towards the connector 56 until a desirable amount of cuff 62 b material overhangs or extends beyond the distal or free end 44 b of the cuff holder 60 .
- the user practices connecting the two overhanging portions of cylindrical cuff material whose distal open end are in juxtaposition or adjacent to each other. Connecting the two adjacent cylindrical overhanging portions of cuffs 62 a and 62 b is performed by repeatedly passing one or more suture 68 through one cuff 62 a and the other cuff 62 b to connect them together.
- the skill requires keeping one or more of the cuffs 62 a, 62 b under some tension so that ends can be sutured yet not with too much tension so that sutures do not tear through the cuffs.
- the overhang portion of the cuffs 62 a, 62 b advantageously mimics certain real tissue structures such as a portion of the bowel and allows the user to practice whatever suturing technique they would like to practice in the laparoscopic or endoscopic minimally invasive procedure in which the cuff model 50 is hidden from direct visualization by the surgeon having been placed inside the surgical trainer 10 .
- this cuff model 50 includes two open cylindrical portions of cuff material that are held in proximity on respective cuff holders.
- the cuff holders can be adjusted to increase or decrease the difficulty in suturing the free ends together.
- one connector can be twisted or directed to one side to offset one cuff holder from the opposed cuff holder or otherwise place the longitudinal axis of one cuff holder at an angle to the longitudinal axis of the other cuff holder to thereby offset or angulate the mounted cuffs from each other as described above with respect to FIGS. 8 and 9 .
- At least one of the connectors 54 , 56 with attached cuff holders 58 , 60 may be removable from the base 52 for placement inside holes formed in the base 52 at different locations. The arrangement of holes in the base 52 allows for different angulations of the cuffs with respect to each other.
- the model 50 is ideal for practicing different types of anastomoses including end-to-end anastomosis as shown in FIG. 9 in which the ends of the cuffs are positioned approximately 1.5 inches apart and the ends of the holders are approximately 3.5 inches apart, side-to-side anastomosis in which the longitudinal axes of the cuffs 62 a, 62 b together with the cuff holders 58 , 60 are oriented substantially parallel to each other by placing the connectors 54 , 56 into adjacent holes in the base such that the cuffs are in juxtaposition, and side-to-end anastomosis in which the longitudinal axes of the cuffs 62 , 62 b together with the cuff holders 58 , 60 are oriented substantially perpendicularly to each other by placing the connectors 54 , 56 into appropriate holes in the base 52 such that the end of one cuff is in juxtaposition to the sidewall of the other cuff.
- the connectors may be flimsy goosenecks that require propping or constant adjustment to simulate real tissue that requires the user to support using an additional instrument or procedure.
- cuff model 50 can also be used with four cylindrical cuffs 62 a, 62 b, 62 c, and 62 d to create a construct having two layers of polymeric mesh material formed by cuffs 62 a, 62 c on one cuff holder 58 and two layers of polymeric mesh material formed by cuffs 62 b, 62 d on the other opposed cuff holder 60 .
- an inner layer and an outer layer are provided which are both sutured closed.
- first cuffs 62 a, 62 b are white in color and stretched slightly and pulled onto and over the cuff holders 58 , 60 , respectively, leaving oppositely disposed overhang portions distal to the cuff holder distal ends 44 a, 44 b, respectively.
- second cuffs 62 c, 62 d that are red or pink in color are placed over the first cuffs 62 a, 62 b, respectively, by stretching it slightly and pulling it over the first cuffs 62 a, 62 b and onto the cuff holders 58 , 60 , respectively.
- a first white cuff 62 a is placed inside a second red or pink cuff 62 c and then both are simultaneously stretched slightly and then pulled over the first cuff holder 58 simultaneously.
- the stretching of one or more cuffs over the cuff holder is what holds the one or more cuff layer in place and movably connected to the cuff holder.
- the overhang portion includes an inner cuff 62 a and an outer cuff 62 b on one cuff holder 58 and an overhang portion of an inner cuff 62 b and an outer cuff 62 d on the other cuff holder 60 with the distal overhanging portions that extend away from the free ends 44 a, 44 b of the cuff holders 58 , 60 meeting in juxtaposition or adjacent to each other and in some variations separated by a distance across which suturing is practiced.
- the diameter of the inner and outer cuff layers is substantially identical and they are made with the same materials and approximately the same thickness (approximately 1/16 inches thick). In one variation, the outer cuff is slightly thinner than the inner cuff.
- the inner or first cuffs 62 a, 62 b have a diameter of approximately 1.0 inch and the outer or second cuffs 62 c, 62 d have a diameter of approximately 1.125 inches.
- the cuff holders 58 , 60 are approximately 1.125 inches in diameter. With at least one cuff 62 on the cuff holders 58 , 60 , the cuff holders 58 , 60 can be articulated using the flexible connector 54 , 56 to position the distal open ends of the cuffs 62 in a manner that suits the clinician to practice the different types of anastomosis mentioned above.
- the diameter of the cuffs may vary from approximately 1.0 mm for vascular anastomosis and up to approximately 65 mm for gastric anastomosis with correspondingly sized cuff holders to hold the different cuffs.
- the cuff holders may interchangeable with the connectors and bases to fit different cuffs.
- the clinician can practice manipulating the position of the cuff holders 58 , 60 to adequately suit his needs. Then, the user sutures the cuffs together.
- the position of the cuff can be manipulated during the closure by the clinician or assistant in order to obtain the optimal position for the surgeon to perform suturing.
- the articulating connector arms 54 , 56 allow for different positions of the cuffs 62 .
- the user can cut the sutured portion out removing it from the remainder of the remaining tube leaving two tubular pieces mounted on the cuff holders.
- the remaining tubular pieces can be moved by sliding on the cuffs towards the free ends 44 a, 44 b of the cuff holders to create overhang portions of sufficient length to practice suturing the two adjacent tubular cuffs together again. This process can be repeated until there is insufficient cuff remaining to be held stretched onto the cuff holders at which point new cuffs can be placed over the cuff holders for further practice.
- the cuffs 62 are designed as consumable components which are approximately 3 inches long and may be longer which allows for multiple uses before needing a replacement.
- a kit comprising of a number of cuffs may be sold to accompany an already purchased cuff holder, connector and base which may also be included in the kit.
- the user sutures the overhanging cuffs together.
- the sutured portion of the cuff is cut out so that the remaining length of the cuff can be used several more times before it needs to be replaced.
- the cuff model 50 advantageously isolates the step of suturing a tubular opening, in particular, the laparoscopic suturing of two tubular structures together in a representative model for the purpose of repeated practice.
- Cuff model 50 is particularly useful for practicing anastomosis which is the connection of two structures. It refers to connections between blood vessels or between other tubular structures such as loops of intestine.
- An example of surgical anastomosis which the user can practice is when a segment of intestine is resected and the two remaining ends are sewn or stapled together (anastomosed), for example, in a procedure called Roux-en-Y anastomosis.
- the model would be employed with a singular cuff 64 that is mounted on both cuff holders 58 , 60 and spans the distance between the cuff holders 58 , 60 as shown in FIG. 11 .
- the single cuff 64 can include a fake tumor 66 attached to the cuff 64 providing visual indication to the user of the location of the tumor by contrast coloring. The user can then resect that portion of the simulated intestine removing it from the cuff 64 and then manipulate the connectors 54 , 56 to bring the remaining overhang portions closer together for anastomosis suturing or stapling the two remaining overhanging tubular portions together.
- the cuff 64 is approximately 1 ⁇ 8 inch thick and 6-12 inches in length.
- the model may further include adjunct simulated organs and tissues.
- simulated adnexal tissues and peritoneum are provided with the model in addition to simulated uterosacral ligaments and bladder.
- These simulated tissues are made of silicone or other appropriate material.
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US11514819B2 (en) | 2022-11-29 |
AU2013323744A1 (en) | 2015-03-26 |
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CA2885433A1 (en) | 2014-04-03 |
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US20200152086A1 (en) | 2020-05-14 |
KR20150064120A (ko) | 2015-06-10 |
JP2015532450A (ja) | 2015-11-09 |
EP2907125A1 (de) | 2015-08-19 |
US20140087346A1 (en) | 2014-03-27 |
CA2885433C (en) | 2023-04-04 |
WO2014052373A1 (en) | 2014-04-03 |
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