Abstract: An exemplary implantable prosthetic device has a coaption element and at least one anchor. The coaption element is configured to be positioned within the native heart valve orifice to help fill a space where the native valve is regurgitant and form a more effective seal. The coaption element can have a structure that is impervious to blood and that allows the native leaflets to close around the coaption element during ventricular systole to block blood from flowing from the left or right ventricle back into the left or right atrium, respectively. The coaption element can be connected to leaflets of the native valve by the anchor.

Abstract: A total knee prosthesis to be implanted in a human patient includes a femoral element having a longitudinal axis, a tibial plateau having a longitudinal axis and a mobile plate. The mobile plate is interposed between the femoral element and the tibial plateau to form two joints with them wherein: a) the surfaces of mutual friction of the femoral element with the mobile plate and the surfaces of mutual friction of the tibial plateau with the mobile plate are entirely constituted by one and the same massive ceramic material; and b) the mobile plate includes two condylar bowls, and the femoral element includes two condyles, the condyles and the condylar bowls each having surfaces of mutual friction spaced apart from each other by a distance smaller than 100 ?m when the longitudinal axes of the femoral element and the tibial plateau form an angle of 0° to 75°.

Abstract: According to one example, a tibial bearing component for articulation with a medial condyle and a lateral condyle of a femoral component in a knee replacement procedure is disclosed. The tibial bearing component can include a distal surface and an articular surface opposing the distal surface. The articular surface can include a medial compartment and a lateral compartment configured for articulation with the medial condyle and the lateral condyle of the femoral component, respectively. The lateral compartment can have a lateral articular track with a lateral anterior-posterior extent. The lateral articular track can comprise a plurality of distal-most points along a proximal surface of the lateral compartment that are contacted by the lateral condyle during rollback of the femoral component. The medial compartment can differ in configuration from the lateral compartment and can have an anterior lip height of between about 9 mm and about 13 mm.

Abstract: A humeral head implant system includes a head component including a first articulating surface, a second bottom surface extending from the first spherical articulating surface, a first cavity extending a first distance into the head component from the second bottom surface, and a second cavity extending into the head component along a cavity axis. The head component defines a head axis extending through a center of the first articulating surface parallel to the cavity axis. A base component defines a slot extending from a first width to a second width. An insert component includes an insert body, a first engagement feature, and a slot engagement feature. The first engagement feature is received in the second cavity along the cavity axis. The insert body has an insert thickness less than the first distance, and the slot engagement feature slides into the slot in a direction transverse to the cavity axis.

Abstract: This shoulder prosthesis glenoid component (2) has on one of its faces an articulation surface (SA) adapted to cooperate with a humeral head and having, on an opposite face (SG) adapted to be immobilized on the glenoid cavity (G) of a shoulder, a keel (4) for anchoring it in the glenoid cavity (G). This keel (4) comprises a body (5) that extends from the opposite face (SG). The keel (4) comprises at least one fin (6) projecting from the body (5) 2 which runs over at least a part of the perimeter of the body (5).

Abstract: A prosthesis that mechanically couples with both cancellous bone and cortical bone of a glenoid includes a head portion comprising a rear surface and an articular surface, an anchor member, and a plurality of deformable fins extending radially outward from the anchor member. The anchor member includes a distal end and a proximal end connected to the rear surface of the head portion. The plurality of deformable fins extend radially outward from the anchor member and includes at least a first proximal fin adjacent to the rear surface of the head portion positioned to engage with the cortical bone. The anchor member may also include at least one distal fin located proximate the distal end of the anchor member positioned to engage with the cancellous bone.

Abstract: A multicomponent implant system includes a multicomponent implant comprising a base plate and a load plate. The base plate includes a bone facing surface and a base plate interface surface. The load plate includes a load plate interface surface and a load bearing surface, the load bearing surface being substantially parallel to the load plate interface surface and having a contour substantially corresponding to a contour of a removed portion of the articular surface. Both the load plate interface surface and base plate interface surface have a contour substantially corresponding to the contour of the load bearing surface. The load plate is configured to be advanced in an arcuate direction to slidably couple the load plate to the base plate after the base plate has been secured within the first excision site by an anchor.

Abstract: A device for use during an arthroplasty procedure of a joint of a patient, the joint extending between a first joint end of a first bone and an abutting second joint end of a second bone of the patient. The device includes first and second components that can be mated together. The first component includes an attachment fitting configured for disposing over the first joint end of the first bone and a stem extending from the attachment fitting and suitable for extending along an intra-medullary canal of the first bone. The second component includes an end plate configured to mate with the attachment fitting and a longitudinal plate extending from the end plate and configured for disposing along a medial, longitudinal surface of the first bone. The device also includes at least one fastener for coupling the longitudinal plate to the first bone.

Abstract: A surgical balloon composed of an aseptically recovered umbilical cord vessel is provided. Methods of preparing a balloon and methods of using the same are also provided.

Abstract: An intervertebral implant for implantation in an intervertebral space between vertebrae. The implant includes a body having a front end, a rear end and a pair of spaced apart first and second side walls extending between the front and rear ends. The front and rear ends extend in a transverse direction and a central axis of the body extends from the rear end to the front end. The rear end defines a first fastener hole having a first central axis and a second fastener hole having a second central axis. The first and second central axes extend parallel to one another at an acute angle relative to the body central axis in the transverse direction.

Abstract: An intervertebral implant for insertion into an intervertebral disc space between adjacent vertebral bodies or between two bone portions. The implant includes a spacer portion, a plate portion operatively coupled to the spacer portion and one or more blades for securing the implant to the adjacent vertebral bodies. The blades preferably include superior and inferior cylindrical pins for engaging the adjacent vertebral bodies. The implant may be configured to be inserted via a direct lateral trans-psoas approach. Alternatively, the implant may be configured for insertion via an anterior approach.

Abstract: An implant including a first body member and a second body member and a first bone contacting element extending from the first body member to the second body member. The first bone contacting element may have a spiral configuration forming a plurality of arched members including at least two arched members extending substantially parallel to and offset with respect to one another.

Abstract: An expandable housing for an interbody fusion system has movable tapered external helical threaded members that travel along tracking to operably engage against the top and bottom shell members, urging them apart to cause expansion in the height of the housing. In an embodiment, the tapered members are disposed in a dual arrangement such that independent engagement of the tapered members along lateral portions of the top and bottom shells cause an angular tilt to the exterior surface of the housing when the tapered members are moved to different degrees. This function permits adjustment in the angular relationship between adjacent vertebrae and assists the lordotic adjustment of the patient's spine. When the functions of the device are used in combination by the surgeon, the device provides an effective tool for in situ adjustment when performing lateral lumbar interbody fusion.

Abstract: An instrument includes a sleeve extending between proximal and distal ends. The sleeve defines a passageway. The distal end defines an engagement portion including an engagement surface extending from a first end to a second end. A peg extends outwardly from the first end. An opening that is in communication with the passageway extends through the second end. A knob is coupled to the proximal end. A shaft includes a proximal end and an opposite distal end. The distal end of the shaft includes a mating portion. The mating portion extends through the opening. The proximal end of the shaft is coupled to the knob. The knob is rotatable relative to the sleeve to rotate the shaft relative to the sleeve. Methods of use are disclosed.

Abstract: A kit for preparing an intervertebral disc space for receiving an implant (100) includes a plurality of trials (152) having different sizes. Each trial (152) includes a body (154) insertible into an intervertebral disc space, the body (154) having a leading end (162), a trailing end (164), a top surface (156) and a bottom surface (160), the top surface of the body having a first groove (176) formed therein. Each implant also includes a flange (166) secured to the trailing end (164) of the body (154), the flange (166) having a first channel (180) aligned with the first groove (176), wherein each of the different sized trials has a different flange thickness. The flange thickness controls advancement of a cutting tool such as a chisel (192) into the first groove at the top surface of the trial body, which controls the depth of the cut into vertebral bone.

Abstract: Systems and methods for robotically distracting a disc space are provided for implantation of an intervertebral prosthetic disc. The system includes a 3D modeling system for creating a 3D model of first and second vertebra adjacent the disc space and identifying positions of the first and second vertebrae. A robotic distractor precisely opens the disc space just large enough to receive a selected intervertebral disc. A computing system stores and processes the 3D model and the positions of the first and second vertebrae before and after distraction. A surgeon interface on the computing system allows the surgeon to select an intervertebral disc prosthesis to be implanted and a desired distraction distance or force to be achieved.

Abstract: A stent is effective for anti-migration after operation of a lumen, and a first outer stent or a second outer stent is used to be integral to a cylindrical stent and an upper end part of each of the first outer stent or the second outer stent is connected to the cylindrical stent by sutures to have a space part between the cylindrical start, the first outer stent, and the second outer stent. The space part is provided such that the first outer stent or the second outer stent is freely moved or transformed by an external force, and a displacement part caused by the movement or a transformation part caused by the transformation further presses or moves into a lesion part or an inner surface of the lumen to be securely held thereon, whereby the stent is effectively prevented from deviating from the lesion part.

Abstract: To provide a stent excellent in deformability, capable of maintaining a radial force for a longer period of time, and having bioabsorbability and a method of producing the same. The bioabsorbable stent has a core structure including a magnesium alloy and a corrosion resistant layer on the core structure, wherein the core structure is formed from a magnesium alloy containing 90 mass % or more of Mg as a main component, Zn, Zr, and Mn as accessory components, and 30 ppm or less of unavoidable impurities selected from the group consisting of Fe, Ni, Co, and Cu, and the alloy excluding aluminum and at least one sort of rare earths selected from the group consisting of Sc, Y, Dy, Sm, Ce, Gd, and La; and the corrosion resistant layer containing magnesium fluoride as a main component with a hydrophilic smooth surface is formed on the core structure with a smooth surface.

Abstract: Delivery systems for deploying a self-expanding tube into a blood vessel are disclosed. In one arrangement, a tubular member is provided that is configured for insertion into the blood vessel. An elongate body extends within a lumen of the tubular member. A self-expanding tube is positioned radially between the tubular member and the elongate body. Over at least 50% of the length of the self-expanding tube, at least a portion of the self-expanding tube engages outwardly with the tubular member and inwardly with the elongate body.

Abstract: A delivery device according to principles described herein includes a catheter having three concentric shafts including an inner core, an outer sheath over the inner core and an outer support shaft at least partially extending over the inner core and the outer sheath. A timing belt having a plurality of belt teeth on a surface of the timing belt is coupled to an outer sheath over a medical device or stent on the inner core such that movement of the timing belt link causes movement of the outer sheath from its position over the medical device or stent. The delivery device is actuated by rotation of a thumbwheel a thumbwheel coupled to a barrel having a plurality of teeth such that rotation of the thumbwheel causes movement of the barrel such that the barrel teeth engage the belt teeth to cause movement of the timing belt causing movement of the outer sheath.

Abstract: A method is used to reduce a volume of a stomach of a patient. The method includes inverting a portion of a stomach wall to thereby create an inverted portion. An expandable member is positioned adjacent to the outer surface of the inverted portion. The expandable member is expanded to thereby expand the inverted portion. The expanded expandable member has a first outer diameter. A base region of the inverted portion is cinched to thereby capture the expanded expandable member in the expanded inverted portion. The expanded expandable member has a first outer diameter. Expanding and cinching provide a cinch diameter to first outer diameter ratio from approximately 0.5:1 to approximately 0.9:1.

Abstract: A medical, in particular orthopaedic, aid (1, 1?, 1?), such as for example an orthosis (1), bandage (1?) or compressive item of clothing (1?), consisting of at least one base body (2, 2?, 2?) of at least one elastic and/or non-elastic textile material (3, 3?, 3?), which is designed for the supporting of tissue and/or parts of the body of a patient, wherein the at least one textile material (3, 3?, 3?) of the base body (2, 2?, 2?) is designed at least partially to be substantially transmissible with respect to UV radiation.

Abstract: A dynamic tension system connects to an orthopedic device having a frame and a hinge connected to the frame. The dynamic tension system includes a cable, an adjustment mechanism connected to the cable and arranged to incrementally wind or release the cable, and a tension control device connected to the adjustment mechanism and arranged to limit the adjustment mechanism from winding of the cable past a predetermined tension level.

Abstract: The invented robot provides necessary traction for reduction of foot bone fracture in surgical operation. This robot is equipped with four electrical motor and with aid of three linear and one rotational degree of freedom assists surgery team to align broken foot bone fragments in line precisely. Hence patient foot restores its desired direction during all different stages of operation with proper traction.

Abstract: Disclosed is an ostomy device with an adhesive wafer for attachment to a skin surface of a user and a collecting bag for collecting output from a stoma. The collecting bag is connected to the adhesive wafer, and the adhesive wafer has a through-going hole for accommodating the stoma of the user. The adhesive wafer includes a backing layer, a first switchable adhesive composition, a second adhesive composition, and a release liner. The first adhesive is contained in a recess in the device. The first switchable adhesive composition comprises a polymer and a switch initiator, and can be switched from a first liquid state to a second adhesive state by activation of the switch initiator.

Abstract: A method for accessing matter within an intestine, includes creating an opening extending through an abdominal wall of an abdominal cavity, accessing an intestinal end segment of an intestine within the abdominal cavity, positioning the intestinal end segment of the intestine in registration with the opening extending through the abdominal wall, attaching the intestinal end segment to cutaneous tissue surrounding the opening to establish fluid communication between a lumen of the intestine and the opening through the abdominal wall, securing an access device adjacent the opening through the abdominal wall and connecting a receptacle to the access device configured to be in fluid communication with the lumen of the intestine to collect matter within the intestine.

Abstract: A method can be provided that includes measuring sound waves using a sound measuring device, determining, at a central controller of an air mattress system, one or more parameter values of the sound waves, comparing the one or more parameter values with values, ranges, or patterns indicative of snoring, identifying a snoring state of a user, and initiating, with the central controller, a change to one or more adjustable features of the air mattress system.

Abstract: A bicanalicular probe intended to be inserted into the nasolacrimal duct of a patient including a central tubular part 1 made from a material compatible with insertion into the human body, preferably silicone, and two termination parts 4, 5 each fixed to one end of the central tubular part 1, characterized in that the two thickened parts 6, 7 project from the central tubular part, the two thickened parts being firstly at a distance from each other and secondly each at a distance from the ends 2, 3 where the termination parts are attached.

Abstract: A method for altering an eye color of a patient with a color alteration procedure is disclosed that may include determining a laser power to deliver to stromal pigment in an iris of the eye of the patient by at least retrieving a set of laser criteria for delivery of an exposure less than 100 times a maximum permissible exposure that causes elimination of at least a portion of the stromal pigment. A laser system may be set to deliver laser light at the laser power which is less than the set of laser criteria and the laser light may be delivered with the laser system.

Abstract: The present disclosure relates to a multi-core optical fiber cable (MCF). In some embodiments, an MCF comprises a plurality of cores, a cladding surrounding the plurality of cores, wherein a refractive index of one or more of the plurality of cores is greater than a refractive index of the cladding, and a coating surrounding the cladding, a distal end free of the coating and having a reduced diameter. The MCF also comprise an annular gap formed between the distal end of the MCF and the inner surface of the cannula, wherein the concentricity of the distal end of the MCF with the inner passage of the cannula is maintained.

Abstract: Protective headgear including an automatic darkening filter with an array of switchable shutters, and including a shutter control system, at least one workview image acquisition device, and at least one eye position monitoring device, wherein the shutter control system is controllably connected to each switchable shutter of the array of switchable shutters so as to control the switching of each of the switchable shutters, and is receivably connected to the at least one workview image acquisition device and to the at least one eye position monitoring device.

Abstract: A display device and an operating method thereof are provided. The display device may include: a display; a camera; a memory configured to store one or more instructions; and a processor configured to execute the instructions to obtain an image captured by the camera, transform the image based on visual condition information of a user, the visual condition information including information about a type of visual impairment of the user, and display the transformed image on the display.

Abstract: A wound care device that can be effectively attached to a wide range of wound locations without the use of any adhesives, can apply controlled, consistent pressure to the wound, and can be configured to allow the clinician to see relevant areas of the patient's body is disclosed. The wound care device includes a contact pad connected with a securing strap. The securing strap includes an inelastic strap segment and an elastic strap segment. The elastic strap segment is coupled with an attachment segment, which attaches to the inelastic strap segment and cooperates with the elastic strap segment to compress the contact pad to the wound.

Abstract: An absorbent article and method of making the absorbent article are disclosed. The absorbent article having a topsheet, a backsheet, and an absorbent core structure having one or more layers wherein at least one layer is a heterogeneous mass layer, wherein the topsheet and the heterogeneous mass are integrated such that they reside in the same X-Y plane.

Abstract: An absorbent article includes an absorber including cells, each of which is surrounded by bonded portions of a front surface side sheet and a back surface side sheet and in each of which the front surface side sheet and the back surface side seat are not bonded, and including superabsorbent polymer particles contained in each of the cells. The bonded portions are arranged in dotted line shapes according to a pattern in which same-sized octagonal portions having all interior angles of 135°, and having two pairs of opposite sides whose facing directions are mutually orthogonal are equal in length, and diamond-shaped portions each having equal length of all sides and being formed in portions among the octagonal portions, are arranged without any space in the front-back direction (LD) or the width direction (WD).

Abstract: An apparatus for manufacturing an article including an absorbent body includes: first and second rolls, in cooperation with each other, for trimming a continuous laminate to be the absorbent body so as to successively form the narrowed portions along the continuous laminate; a third roll for rotating in contact with the second roll to receive the continuous laminate from the second roll; and a separating cutter for successively severing the continuous laminate being carried by the third roll into units of individual articles, thereby obtaining the absorbent body.

Abstract: The present disclosure provides a sanitary napkin that is thin, highly absorbent and has resiliency properties that are selected to provide good comfort potential and at the same time reduce the likelihood of deformation and breaking. In a specific example, the sanitary napkin comprises a cover layer, an absorbent system and a barrier layer. The absorbent system includes an absorbent core and a reinforcement layer.

Abstract: A three-dimensional substrate has a central longitudinal axis extending perpendicular to a central lateral axis. A line taken in a direction parallel to or perpendicular to the central lateral axis of the three-dimensional substrate has a non-apertured, first visually discernible zone in the substrate and a second visually discernible zone in the substrate. The first visually discernable zone has a pattern of three-dimensional features on a first surface or a second surface. At least some of the three-dimensional features define a microzone having a first region and a second region. The first region and the second region have a difference in value for an intensive property. The second visually discernable zone defines apertures. The apertures have an Effective Aperture Area in a range of about 0.3 mm2 to about 15 mm2.

Abstract: The present invention relates to disposable absorbent articles such as sanitary napkins, panty liners, baby diapers, adult incontinence articles and sweat pads. According to the present invention the absorbent article in the region designated for liquid deposition on its wearer facing surface has a single layer topsheet onto which liquid to be absorbed is provided during use of the article. The absorbent article includes a backsheet forming the liquid barrier surface and a unitary absorbent core between the topsheet and the backsheet. Importantly the unitary core provides improved liquid handling to the absorbent article and increases the masking, i.e. ability to hide stains due to absorbed liquid, of the article. This is particularly beneficial in the context of articles for absorption of liquids with high color intensity, such as menstrual liquid or urine of older adults.

Abstract: The present invention discloses an absorbent article for attachment to the interior of a child potty/bed pan or to be worn on an user. The absorbent article composes an absorbent core, first absorbent channel layer, intermediate channel layer and top permeable layer composes made up of permeable materials and further includes a material capable of converting a liquid substance to a gel-like substance. Specifically, regions of the absorbent core first absorbent channel layer and intermediate channel layer may include a super absorbent polymer (SAP) material such as hydrogel, sodium polyacrylate, polyacrylate absorbents, or a biodegradable material such as a powder corn starch or wheat mixture or a combination of super absorbent polymer (SAP) and a biodegradable material.

Abstract: A fluid distribution material for use in an absorbent article includes a formed film layer having a user-facing side and a garment-facing side opposite the user-facing side. The formed film layer includes a plurality of apertured protuberances arranged in a pattern having 10 to 40 protuberances per linear inch. Each of the protuberances includes a continuous sidewall extending from the user-facing side. The garment-facing side has a plurality of apertures aligned with the plurality of apertured protuberances and land areas in between the apertures. A nonwoven layer is laminated to the garment-facing side of the formed film layer. The nonwoven layer includes a plurality of continuous fibers extending across the land areas and the plurality of apertures of the formed film layer and attached to the land areas at bond sites. The fluid distribution material has a compressibility of less than 10% between pressures of 0.21 psi and 0.60 psi.

Abstract: A diaper band for ensuring that a toddler cannot remove a diaper secured thereby. The diaper band has central inner-facing hook fabric that can be attached to the fabric on the front of a typical diaper (disposable or reusable). The diaper band also has ends bearing hook and loop material that are securable to the back of the diaper behind the back of the toddler, to ensure that the toddler cannot detach the diaper band. The diaper band securely covers the attachment tabs of the diaper, so that the toddler cannot undo the diaper tabs. The central inward-facing hook fabric can be one or more material patches that are big enough to grab onto the front fabric of the diaper, the same front fabric for attaching the diaper tabs. Alternatively, the central inward-facing hook material region can extend along the entire length of the diaper band.

Abstract: The absorbent article comprises at least a topsheet layer and a backsheet layer, each layer having a body facing surface and a garment facing surface, and longitudinal and transversal edges, the article having a longitudinal front portion, a longitudinal back portion and a crotch portion located between the front and the back portion. The article comprises a first and a second zone of microencapsulated phase change material on a surface of a layer of the article. The first and second zones are selected form zones having different microencapsulated phase change materials, different concentrations of a microencapsulated phase change material or comprise microencapsulated phase change material having different phase change temperature intervals.

Abstract: A medical cast protective structure apparatus and methods are used to protect against unsanitary contamination of a medical cast. A medical cast has a hardened exterior layer and a plush interior layer. A water-resistant fabric cover has a substantially cylindrical shape and is positioned over at least a portion of an exterior of the medical cast and a terminating end of the medical cast. An annular pocket is formed in a first end of the fabric cover, wherein the first end of the fabric cover is positioned abutting the plush interior layer of the medical cast. A biasable clip is positioned within the annular pocket, wherein the biasable clip is movable between collapsed and expanded states, wherein in the expanded state, the annular pocket with biasable clip therein contacts the plush interior layer of the medical cast and is retained in a substantially stationary position relative to the medical cast.

Abstract: The gurney cover and optional heating system comprises a container, a body cover spool, a body cover, a head cover spool, a head cover, a plurality of container clips, one or more body cover clips, and one or more head cover clips. The container may couple to a first side of a gurney via the plurality of container clips. The body cover and the head cover may be adapted to be deployed from within the container by pulling them across the gurney to cover a patient. The body cover may couple to a second side of the gurney via one or more body cover clips. The head cover may couple to the second side of the gurney via one or more head cover clips. The body cover, the head cover, or both may comprise battery-powered heating elements that are adapted to warm the patient.

Abstract: A rigid frame wheelchair of a box frame design includes a base frame having a rear axle for receiving rear wheels and a left-hand side strut and a right-hand side strut for receiving steering wheels, an L-shaped seat-foot support frame having an L-shaped left-hand strut and an L-shaped right-hand strut, two coupling units that connect together in an articulated manner the base frame to the seat-foot support frame about an axis vertically to a sagittal plane for an angular adjustment, a left-hand frame connector and a right-hand frame connector that fixedly connect together the base frame and seat tube segments of the L-shaped struts.

Abstract: An assistance device that enables a caregiver or care receiver to understand a degree to which a load is applied in the front-rear direction of a body supporting member. The assistance device includes: the body supporting member configured to support the upper body of the care receiver; a load detecting device provided on the body supporting member and configured to detect a load applied by the care receiver; and a display device configured to display an extent to which a load is applied to the body supporting member in a front-rear direction of the body supporting member based on the load detected by the load detecting device.

Abstract: Joystick chair is an input device for interaction between the user and computer. It enables the movement of the user in games. The invention is used by placing feet on the platform (3) and sitting or leaning on the seat (23). Command for turning is achieved by rotating the seat (23), either to the left or to the right. Command for forward movement is issued by pulling the left or right controller (36, 41) with fingers, while the command for backward movement is issued by pushing the left or right controller (36, 41) away by palms. Control handles for lateral movement (49, 56) are separated from the forward-back controls that are located on the controllers (36, 41). Other commands are achieved with buttons on the left and right controller and they are accessible with thumbs. The software allows the modifications of all available actions of the invention.

Abstract: An adjustable patient support apparatus comprises a base, a support frame, and a patient support deck. The patient support deck comprises articulating deck sections, such as a leg section, seat section, and a back section pivotally coupled together. One or more actuators may be configured to move the leg and/or back section between a lowered position and one or more raised positions. The seat section may include one or more articulating seats to assist with ingress and egress from the patient support apparatus. The one or more seats may be articulated manually or electrically via a lever or actuator.

Abstract: A patient support arrangement includes features that reduce pressure points and chafing. Chafing is reduced by using a mattress topper including first and second low friction sheets adjacent to each other and secured relative to a cushion, so that when the patient shifts relative to the cushion, the shifting is more likely to be borne between the first and second low friction sheets than between the patient and the mattress topper.