A physical assessment device includes an instrument head, an optical assembly and an adapter interface member. The instrument head includes an illumination assembly including at least one LED and a drive circuit for powering the at least one LED with a pulse width modulation (PWM) current to achieve a variable brightness of the at least one LED. The optical assembly includes a plurality of optical components disposed along an optical axis. The adapter interface member enables an image capture device to be attached to the instrument head and aligned with the optical axis. The image capture device is configured to capture images of medical targets when illuminated by the at least one LED. The drive circuit is coordinated with the image capture device to ensure that the medical targets are at least partially illuminated during the capturing of the images notwithstanding the variable brightness of the at least one LED.

An optical system for rigid endoscope includes an objective optical system, an eyepiece optical system, and a relay optical system which is disposed between the objective optical system and the eyepiece optical system. The objective optical system includes in order from an object side, a first lens having a negative refractive power, a second lens having a positive refractive power, a third lens having a positive refractive power, and a fourth lens having a negative refractive power. The following conditional expressions (1) and (2) are satisfied:
−3<(RL1i+RL1o)/(RL1i−RL1o)<−1.3  (1)
30<νdL1  (2) where, RL1o denotes a radius of curvature of an object-side surface of the first lens, RL1i denotes a radius of curvature of an image-side surface of the first lens, and νdL1 denotes Abbe number for the first lens.

A cannula system and method for accessing a blood mass in the brain. The system comprises a cannula with a camera mounted on the proximal end of the cannula with a view into the cannula lumen and the surgical field below the lumen. A prism, reflector or other suitable optical element is oriented between the camera and the lumen of the cannula to afford the camera a view into the cannula while minimizing obstruction of the lumen. The system may also include an obturator with a small diameter shaft and a large diameter tip which is optically transmissive, so that a surgeon inserting or manipulating the assembly can easily see that the obturator tip is near brain tissue (which is white) or blood (which is red).

A surgical instrument including: a main body; an elongated shaft tube connected to the main body, the shaft tube having at least one working channel tube arranged in an interior of the shaft tube, the at least one working channel tube extending in a longitudinal direction of the shaft tube; and a connection body coupled to a proximal end region of the main body; wherein a proximal end region of the at least one working channel tube is accommodated inside the connection body and is sealed with respect to the connection body.

The present disclosure includes vision preservation systems for medical devices, such as cryospray devices for use with endoscopes. Exemplary embodiments provide a distal attachment in the form of a shroud or cap that mounts to the end of a flexible endoscope. A purging fluid supply mechanism is provided along the length of the endoscope, providing a channel for purging fluid, such as gas, to communicate between the endoscope tip and an external gas supply. The cap or shroud assembly incorporates a lens clearing flow field adjustment mechanism, such as nozzles, designed to direct warm (room temperature or higher) purging fluid across a lens at the scope tip. Another flow deflection mechanism, such as a guide or nozzle, may be included with the cap to direct purging fluid at an angle away from the lens.

An endoscope having a multiple diameter working section is disclosed. The endoscope includes a housing, a working section, and a rod-lens optical system. The housing is at a proximal end of the endoscope. The working section is integral with and extends from the housing. The working section includes at least a first section and a second section. The first section is contiguous to the housing, and the second section is at a distal end of the endoscope. The rod-lens optical system is positioned at least partially in the first section of the working section and at least partially in the second section of the working section. The endoscope is defined such that the outer diameter of the first section is larger than the outer diameter of the second section.

Exemplary embodiments of a disposable endoscope are provided. For example, an endoscope is provided, including a tube having a proximal end and a distal end, a lumen having a proximal end and a distal end, the lumen surrounding an outer circumference of the tube, and a series of achromatic double lenses and singlet lenses within the tube from the distal end to the proximal end of the tube for conveying an image from the distal end of the tube to the proximal end of the tube. A housing is provided at the proximal end of the tube to provide a light path from the proximal end of the lumen to the distal end of the lumen from a polymer fiber optic located within the housing. A camera interface can be provided at an opposite end of the housing to receive the image from the distal end of the tube.

An endoscope coupler for a camera, with a proximal end of the endoscope coupler for the disposition on the camera, with a camera securement mechanism for securing the endoscope coupler on the camera and with an endoscope head-receiving region for the at least partial reception of an endoscope head when an endoscope is coupled with the camera, wherein the endoscope head-receiving region is accessible across an access for the endoscope head from the direction of a distal end of the endoscope coupler, and with a movably supported jaw that secures the endoscope on the endoscope coupler. The jaw can be loaded with a spring force such that at least one region of the jaw is pressed into the access and blocks the access.

An enhanced optical design for imaging of live human tissue as a supplemental attachment to wireless mobile devices such as smartphones. The improved imaging system includes a series of optical ball lenses coupled to a medical-grade light source to allow universal compatibility to mobile device (e.g., smartphone) cameras. The releasable optical attachment comprises optical enhancement elements allowing universal compatibility without the need of an application or special program to re-orient the image therein permitting less loss of picture acuity and blanket usability to HIPAA-verified smartphone applications used in hospitals and patient's electronic health records. The addition of an external light source and light-redirecting elements negates the need for a smartphone light source or smartphone re-programming to illuminate target.

The present invention relates to nanoparticles, a preparation method thereof, a stone removal device, a magnetic target separation instrument and its application. The nanoparticles include a nanoparticle core made of magnetic materials, and a nanoparticle shell formed by attaching surface modifier monomers to the nanoparticle core with an initiator and/or a crosslinking agent. The prepared nanoparticles can wrap stones in ureter, and then small stones remaining in body can be removed quickly without damage from the body under the action of the magnetic target separation instrument. The stones can be drawn and moved without injuring ureteral wall, and meanwhile be disposed conveniently without easy shift.