Other

Simulab Corporation

Christopher C Toly

Jay Alan Borseth

Aaron M Erbeck

Douglas J Beighle

Tyler L Hartley

A medical trainer simulator includes a plurality of simulated vessels filled with a conductive fluid representing, for example, veins or arteries. While performing a procedure using the medical trainer, a person inserts a medical instrument, e.g., a needle or scalpel, into a selected vessel, causing the medical instrument to contact the conductive fluid. A circuit board detects when a circuit is thus created by detecting an electrical current flowing through the medical instrument and the conductive fluid it has contacted. A software program executing on a computer excludes any phantom circuit occurring when the medical instrument contacts conductive fluid from a previous procedure that is not within one of the vessels. A phantom circuit is detected if the resistance of the resulting circuit exceeds a predetermined threshold. The computer visually and/or audibly indicates whether the correct vessel was pierced or excized by the medical instrument.

Detecting insertion of needle into simulated vessel using a conductive fluid

Conductive elastomeric circuits representing three brachial plexus nerve bundles and sheaths that surround each nerve bundle are embedded in a neck tissue portion of a simulated physiological structure for use in training and evaluating a user in performing a brachial plexus nerve block procedure. An electrically conductive probe is provided for the user to insert within a neck tissue structure and to attempt to contact a sheath, but not the nerve bundle within the sheath of a desired nerve bundle. The probe is electrically coupled to a voltage source. A simulated nerve stimulator is connected to the conductive elastomeric circuits (electrically insulated from each other) and detects when the probe contacts a nerve or sheath, producing an output signal. The output signal is input to a computer that displays a simulated ultrasound image hi-lighting a nerve and/or sheath that has been contacted by the probe, for evaluating the user's performance.

Physiological simulator for use as a brachial plexus nerve block trainer

Conductive elastomeric circuits are used in various simulated physiological structures such as tissues and organs, enabling feedback to be provided indicating whether a simulated task is being performed correctly. For example, a surgical trainer has a simulated human tissue structure made of an elastomeric composition, at least one reinforcing layer of a fibrous material, and at least one flexible electrical circuit. The surgical trainer preferably includes multiple areas for practicing surgical skills, each with evaluation circuits for providing feedback regarding that skill. Conductive elastomers are also incorporated into other types of medical training simulators, to similarly provide feedback. In another embodiment, a simulated organ has a conductive elastomeric circuit in the periphery of the simulated organ, enabling feedback to be provided to evaluate whether a person is properly manipulating the organ in response to a manual applied pressure.

Medical physiological simulator including a conductive elastomer layer

A medical training simulator includes contact-less sensors and corresponding detection objects, configured to enable sensor data collected during a training exercise to be used to evaluate the performance of the training exercise. The simulator includes a simulated anatomical structure, at least one contact-less sensor, and at least one detection object. During a training exercise, a spatial relationship between the contact-less sensor and the detection object produces data for evaluating performance of the training exercise. Either the contact-less sensor or the detection object is embedded in the simulated physiological structure, while the other is included in either a support for the simulated physiological structure, or as part of a tool used during the training exercise. Many types of contact-less sensors can be employed, including capacitance sensors, impedance sensors, inductive sensors, and magnetic sensors.

Medical training simulator including contact-less sensors

A videoendoscopic surgery training system includes a housing defining a practice volume in which a simulated anatomical structure is disposed. Surgical instruments can be inserted into the practice volume to access the anatomical structure. A digital video camera is disposed within the housing to image the anatomical structure on a display. The position of the digital video camera is supported within the practice volume by a camera bracket that enables a position of the video camera relative to the bracket to be selectively changed, thereby changing a viewing angle achieved by the video camera. In one embodiment the camera bracket is coupled to a boom, a proximal end of which extends outside the housing to enable additional positioning of the digital video camera by user adjustment of the proximal end of the boom. The housing preferably includes a light source configured to illuminate the anatomical structure.

Laparoscopic and endoscopic trainer including a digital camera with multiple camera angles

A simulated physiological structure includes an image layer configured to enhance a visual appearance of the simulated physiological structure. The image layer includes a substrate onto which an image has been printed. Preferably, the substrate is a relatively thin layer, compared to other layers of material in the simulated physiological structure. Where the simulated physiological structure includes surface irregularities, the substrate is preferably sufficiently thin so as to be able to readily conform to the surface irregularities. Particularly preferred substrates include fabrics, fibrous materials, meshes, and plastic sheets. The image, which can be of an actual anatomical element, or a rendering of an anatomical element, is transferred onto the substrate using conventional printing technologies, including ink jet printing. Particularly preferred images illustrate vascular structures and disease conditions. Preferably, the substrate is coupled to an elastomeric material that forms at least part of the simulated physiological structure.

Simulated anatomical structures incorporating an embedded image layer

A videoendoscopic surgery training system includes a housing defining a practice volume in which a simulated anatomical structure is disposed. Openings in the housing enable surgical instruments inserted into the practice volume to access the anatomical structure. A digital video camera is disposed within the housing to image the anatomical structure on a display. The position of the digital video camera can be fixed within the housing, or the digital video camera can be positionable within the housing to capture images of different portions of the practice volume. In one embodiment the digital video camera is coupled to a boom, a proximal end of which extends outside the housing to enable positioning the digital video camera. The housing preferably includes a light source configured to illuminate the anatomical structure. One or more reflectors can be used to direct an image of the anatomical structure to the digital video camera.

Laparoscopic and endoscopic trainer including a digital camera

The present invention provides a surgical trainer having a simulated human tissue structure made of an elastomeric composition and having at least one reinforcing layer of a fibrous material. The surgical trainer preferably includes three areas for practicing surgical skills. The first is the abdominal area for practicing diagnostic peritoneal lavage. In a preferred embodiment for practicing this procedure, the surgical trainer includes a simulated tissue structure including a skin layer, a subcutaneous fat layer, an anterior rectus sheath layer, a muscle layer, a posterior rectus sheath layer, an extraperitoneal layer, and a peritoneum layer. Underlying the tissue structure, the trainer includes simulated abdominal organs within an abdominal cavity. The organs and cavity can be filled with simulated bodily fluids to lend more realism to the practice procedure. The second is the chest area. Chest tube insertion and pericardiocentesis are the procedures which can be performed on the trainer for this area. In addition to the simulated tissue structure on the exterior of the chest, the trainer includes additional tissue structure in the form of a layer of simulated tissue to mimic the intercostal muscle and the parietal pleura. To be more lifelike the trainer also includes inflatable lungs to simulate breathing, and ribs. For pericardiocentesis, a sternum, ribs, a heart and additional pericardium tissue structure are included. The heart and pericardium can be filled with simulated bodily fluids to mimic the real life procedure. The third is the neck area. Cricothyroidotomy is the procedure which can be performed on this part of the trainer. In addition to the simulated human tissue structure, the trainer includes a simulated cricoid cartilage, thyroid cartilage, and cricothyroid ligament in this area.

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Seattle, WA, United States of America

Christopher C Toly