220results about How to "Prevent bedsores" patented technology

To provide an adjustable bed that assists a user to turn comfortably in his or her sleep without mental stress. Once an automatic mode starts, measurement on the depth of sleep of the user lying on the bed is launched. The depth of sleep is measured by detecting biological information such as brain waves, heart rate, and respiratory rate of the user using electrode sensors or the like, and analyzing the biological information according to a polysomnography method or the like. If the depth of sleep is 0, i.e., the user is in REM sleep, and if one hour or more has passed since the measurement is launched or since an immediately preceding turn operation, a turn operation is performed to turn the user.

The present invention provides a differential pressure body suit with external support against body suit migration. In its preferred embodiment, such body suit may comprise a close-fitting, multi-layered suit sealed against a mammal's skin to contain the differential pressure, or a looser-fitting suit that bends at the mammal's joints with minimal force. External support means include either fixed or movable mechanical supports attached to the body suit, extraordinary air pressure levels for making the body suit rigid, or exoskeletons attached to the body suit. A cyclic control system can turn the differential pressure condition within the body suit on and off on a selective basis to accommodate the movement of the legs of the mammal. This differential pressure body suit provides a portable and convenient system for, e.g., rehabilitating a skeletal joint injury or training the mammal for injury prevention or athletic performance or fat burning. The pressurization reduces the weight of the body to greater or lesser extents, and offloads the weight to the ground through the external support means.

A patient rehabilitation wheelchair for hospitals based on a full-body massage effect comprises a backrest, a handle, a seat plate, a diagonal bracing plate, a pedal plate and chair wheels, wherein a back massage device is arranged on the rear side of the backrest and comprises a first L-shaped supporting plate; a bearing is inlaid in the upper part of the first L-shaped supporting plate; an inner ring of the bearing is fixedly connected with a rotating rod; the right end of the rotating rod is fixedly connected with a first motor output shaft; the left end of the rotating rod is fixedly connected with a disc; an annular groove is formed in the disc; the depth of the annular groove is changed as a sine function image; and a plurality of changing rods are arranged in the annular groove. The patient rehabilitation wheelchair for hospitals based on the full-body massage effect has the beneficial effects that the back, the hip and the legs of a patient are respectively massaged by the back massage device, a hip massage device and a leg massage device, pressure sore of the patient is avoided effectively, meanwhile, the patient can be massaged, the rehabilitation speed of the patient is increased effectively, and therefore, the patient rehabilitation wheelchair has certain promotion and application value.

A therapeutic mattress is providing including an encasing housing a base layer and a patient support layer in a cavity of the encasing. The base layer has a foam base member and foam side panels connected to the base member. The patient support layer is provided above the base layer and has a plurality of sections or zones. One of the plurality of sections is made of an inflatable component, and another of the plurality of sections is made of a non-inflatable component. In one embodiment, the zones of the patient support surface include a head zone adjacent a head of the mattress, a foot zone adjacent a foot end of the mattress, a seat zone adjacent the head zone, and a knee zone between the seat zone and the foot zone. A foam mattress is provided in the head zone, and an air mattress having a plurality of individual air cells fluidly interconnected is provided in the foot zone.

A therapeutic mattress is providing including an encasing housing a base layer and a patient support layer in a cavity of the encasing. The base layer has a foam base member and foam side panels connected to the base member. The patient support layer is provided above the base layer and has a plurality of sections or zones. One of the plurality of sections is made of an inflatable component, and another of the plurality of sections is made of a non-inflatable component. In one embodiment, the zones of the patient support surface include a head zone adjacent a head of the mattress, a foot zone adjacent a foot end of the mattress, a seat zone adjacent the head zone, and a knee zone between the seat zone and the foot zone. A foam mattress is provided in the head zone, and an air mattress having a plurality of individual air cells fluidly interconnected is provided in the foot zone.

The invention relates to an intelligent overturning antidecubitus air mattress, consisting of a mattress formed by strip air-filling bags and guardrails formed by air bags, wherein the tail ends of a left air passage and a right air passage of the mattress and a left guardrail and a right guardrail are provided with air pipe joints which are connected with air pipes; an air-filling pump, an electromagnetic valve, a control circuit, a driver, a timing data display, a keyboard and a direct-current power supply system are arranged on the air pipes; and the control system can control air filling and air discharging of the left air passage, the right air passage and the air passages of the guardrails by the pressure switch, the electromagnetic valve and the air filling pump in a manual control, remote control and sound control modes, thus controlling the air mattress to be adjusted to be high at the left and low at the right, or high at the right and low at the left or have the same height at the left and the right according to needs. The intelligent overturning antidecubitus air mattress has the benefits of: being capable of realizing various overturning actions of a person lying on the bed, reducing the work load of nursing and effectively preventing the occurrence of the decubitus of a patient.

The invention relates to a wheelchair with massage and rehabilitation functions and used for a lower-limb-paralyzed patient. The wheelchair comprises a backrest, handles, a seat plate, an oblique support plate, a footboard and wheels, wherein a back massage device is arranged on the rear side of the backrest, the back massage device comprises a first L-shaped support plate, a bearing is embedded into the upper portion of the L-shaped support plate, a rotary rod is fixedly connected to the inner ring of the bearing, a motor output shaft is fixedly connected to the right end of the rotary rod, a disc is fixedly connected to the left end of the rotary rod, an annular groove is formed in the disc, the depth of the annular groove is in sine function image change, and a plurality of variation rods are horizontally arranged in the annular groove. The wheelchair has the advantages that the back and the buttocks of the patient can be massaged by the back massage device and a buttocks massage device, the patient can be effectively prevented from having bedsores, the rehabilitation speed of the patient is increased effectively by the massaging, and the wheelchair is worthy of popularization and application.

The present invention provides one kind of foamed polyurethane plastic with excellent stink and moisture adsorption or excellent antibiotic property, and the foamed polyurethane plastic has visible compounded deodorant, antiseptic and other additives. The foamed polyurethane plastic features that it contains carbon powder and / or inorganic antiseptic and is preferably foamed polyurethane plastic with rebound elasticity.

The present invention relates to an automatic excrement processing device comprising: a cup unit (10) worn on a portion of a user at which the excretory organs are located, and forming a space (11) in which urine is suctioned that is partitioned from a space (13) in which feces is suctioned; an excrement processing main body (60) connected to the cup unit (10) and suctioning excrement discharged into the cup unit (10) and storing same; a sensor unit provided on the cup unit (10), connected to the excrement processing main body (60), and sensing excrement; a washing nozzle unit (21) performing a washing function; a suctioning nozzle unit (49) suctioning excrement; and a drying nozzle unit (31) performing a drying function. The present invention has the advantages that the device provides a good feeling when worn, and clean excrement processing is possible through accurate sensing of excrement.

The inflatable, pressure alleviating, eggcrate mattress pad is a mattress pad that is placed on top of a conventional mattress. The mattress pad has an eggcrate-shaped surface and separate air channels inflate and deflate alternating air cells at different intervals and pressure levels. The air cells are alternately inflated or deflated in a checkerboard pattern so that as one air cell point is inflated, the adjoining air cell point is deflated. The mattress pad is also equipped with two inflatable wedges on the underside of the mattress pad. One wedge is on each side of the centerline of the mattress pad. When either of the wedges is inflated it will tip one side of the mattress upwards to assist turning over an immobilized patient.

The invention relates to a multifunctional full-automatic nursing bed and belongs to the industry of medical equipment. The multifunctional full-automatic nursing bed is a professional bed special for bedridden patients. The multifunctional full-automatic nursing bed has the additional functions of aiding a patient in turning over and automatically relieve based on the functions of the existing hospital bed, and turning over complies with the principle that back and lip bed plates are chain bed plates which are turnable. Correspondingly, a mattress is a tubular mattress synchronously moving with the chain plates. Each of the two bed plates is longitudinally split into three pieces, with two side pieces bending up. After the pieces on one side are bent up, the chain bed plates and the rolling mattress move towards the direction of bending up the bed plates to allow the patient to turn over by 0-360 degrees. A toilet bowl folding mechanism is disposed below the rear bed plate. The middle plate of the leg bed plates is powered by electric push bars to ascend to raise legs of the patient so as to raise buttocks off the mattress. A toilet bowl can be pushed by the folding mechanism to automatically move under the buttocks of the patient. The nursing bed is powered by a motor and eight electric push bars and is controlled through a single-chip microcomputer.

The invention discloses an intelligent household electric appliance control nursing device and method based on a multi-mode brain-computer interface. The device comprises a visual stimulation screen, an EEG signal collection system, a computer, a controller and an equipment terminal, wherein the visual stimulation screen, the EEG signal collection system, the computer, the controller and the equipment terminal are mutually connected. The device detects whether a P300 level and an SSVEP are generated in the same target key group at the same time or not, so as to discriminate the idle / control states of a system. The device selects a to-be-controlled household electric appliance and the control of related operation through the brain-computer interface based on the P300. The device and method provide a new nursing mode for paralytic patients (SCA, ALS, etc.) who stay on a bed for a long time. The paralytic patients can autonomously achieve the posture change on the bed, so as to prevent bedsore. Meanwhile, the device and method can achieve the operation control of various types of household electric appliances on the bed, thereby improving the living quality. The device and method can accurately discriminate the idle / control states of the system, are high in recognition rate, are complete in function, are high in practicality, and can be used for the paralytic patients.

The invention discloses a pneumatic turning-over bed, which is composed of a pneumatic rotary table, a curved central shaft, a lower bed, an upper bed, a connecting fixed groove and the like, wherein the interior of the pneumatic rotary table comprises a rotary table fixed block and a rotary table rotatable block, and the shell of the pneumatic rotary table is a rotary table shell; an anticlockwise rotary gas supply pipe and a clockwise rotary gas supply pipe are arranged on the shell; when the anticlockwise rotary gas supply pipe is used for supplying gas, the rotary table rotatable block in the shell as well as the curved central shaft, the lower bed and the upper bed rotate by 180 degrees in an anticlockwise direction; and on the contrary, when the clockwise rotary gas supply pipe is used for supplying gas, the rotary table rotatable block in the shell as well as the curved central shaft, the lower bed and the upper bed rotate by 180 degrees in a clockwise direction. By repeatedly changing gas supply, the lower bed and the upper bed repeatedly rotate and change locations, so that bedridden patients, who are conscious and are able to move hands, can trigger pneumatic switch handles at any time when no accompanying personnel is on duty, so that the patients can turn over at will under pneumatic power without making contact with electric appliance. The pneumatic turning-over bed is safe, simple to operate and self-service, and the turning-over bed is capable of protecting the bedridden patients from bedsores.

The invention provides a bedsore prevention massage turn-over nursing bed. The bedsore prevention massage turn-over nursing bed comprises a bedstead, fixed bedplates, movable bedplates and a movable frame; a movable track frame is fixedly mounted on the lower part of the bedstead; a track is arranged on the movable track frame; the movable bedplates and the fixed bedplates are distributed alternately; each fixed bedplate is fixedly mounted on the upper end of the bedstead; a massage head is arranged on the movable bedplate; the movable bedplates are connected together through a left connecting plate and a right connecting plate; the right connecting plate is connected with two electric push cylinders; the left connecting plate is also connected with two electric push cylinders; four electric push cylinders are all mounted on the movable frame; the movable frame is mounted on the track of the movable track frame through roller wheels; a moving mechanism is arranged between the movable frame and the movable track frame. A patient is moved in a certain distance and turned over on the nursing bed to ensure the patient not to lean to one side after turning over; meanwhile, the massage head can be adopted to massage the patient, so as to have the auxiliary treatment effect and effectively prevent the bedsore.

The invention relates to the field of intelligent nursing, in particular to an intelligent wheelchair vehicle with a nursing function. The intelligent wheelchair vehicle includes a movable vehicle body, a movable vehicle frame, an electric device, a traveling device, a control device, a toilet device, a power supply, an air supply device and a sun shading device. The movable vehicle body is installed on the movable vehicle frame, the movable vehicle frame is equipped with the electric device, the traveling device, the control device, the toilet device, the power supply and the air supply device, the movable vehicle frame can be transformed into sitting, lying down and turning over states, the toilet device is provided with a toilet, the toilet is connected with a cleaning device and a drying device, the air supply device separately communicates with air bags in the movable vehicle body, and the sun shading device is installed at the upper part of the movable vehicle frame. Compared with the prior art, the intelligent wheelchair vehicle with the nursing function of the invention is used as a vehicle and a bed, has the functions of transferring and turning over, and at the same time,the intelligent toilet is arranged to facilitate users to go to the toilet by themselves, the functions of cleaning, drying and odor prevention also be provided, and the work of nurses is greatly alleviated.

The invention provides a translation bed, which comprises a bed body and a bed plate, wherein a rail is arranged at one side of the bed body; the rail comprises a horizontal rail segment and an arc groove segment, which are arranged at an interval; the rail carries out horizontal reciprocating motion in the direction from a bed head to a bed tail under the drive of a power mechanism; the bed body is provided with a main horizontal slideway for supporting the rail for motion; the bed plate comprises a plurality of strip plates which are arranged at equal intervals and are transversely arranged on the bed body; a push rod is arranged at one end, corresponding to the rail, of each strip plate; a vertical guide slideway is arranged on the bed body; a pulley is arranged at the lower end of each push rod; and the strip plates carry out reciprocating motion in the vertical direction under the drive of the rail. By the translation bed, the pressure on blood vessels of a human body in a long-term lying state is relieved by alternate support of the strip plates; smooth blood is kept; the vitality of muscle of a patient lying in bed for a long period of time is improved; and the diseases of bedsores and the like are avoided.

The invention relates to a method for preparing a China hemp fiber, as well as an application of the China hemp fiber on paper diapers. The method for preparing the China hemp fiber comprises the following steps: removing the peel, soaking, degumming, drying and screening. The preparation process is simple, and the cost is saved. The paper diapers are prepared by using the China hemp fiber and have the originally ecological special antibacterial, mould-proof, ventilating, comfortable, radiating and anti-radiation effect; and therefore, compared with the organic and inorganic antibiosis in the prior art, the China hemp fiber is good in antibacterial effect, washing-resistant and easily degradable and can be sustainably utilized; and moreover, the China hemp fiber is good in antibacterial effect, prevents diaper rash and bedsore, is washing-resistant, easily degradable and environment-friendly and can be sustainably utilized, and the resources are saved.

The invention provides a multifunctional nursing bed which comprises a bed frame, a bed board, a bed-head board, two movable armrest frames, a waist supporting mechanism, a turning-over mechanism and a movable wheelchair, wherein the bed frame is fixedly connected with the bed board, and the bed-head board is fixedly connected with the bed frame. The multifunctional nursing bed further comprises the two movable armrest frames. The waist supporting mechanism is located in the middle inside the bed frame and fixedly connected with the bed frame, and the turning-over mechanism is located in the middle of the front half part of the bed frame, namely at the position of a hip seat of the wheelchair. The front end of the turning-over mechanism is fixedly connected with the bed frame, the movable wheelchair is located in the middle inside the bed frame, close to a bed tail, and the movable wheelchair is movably connected with the bed frame. The multifunctional nursing bed is provided with the waist supporting mechanism, the turning-over mechanism, the movable armrest frames and the movable wheelchair and is highly functional, and the problem of poor turning-over performance and supporting back breathability of nursing beds is solved. The movable wheelchair is provided with a pedestal pan and is convenient and hygienic; the movable wheelchair is provided with a safety belt, a patient does not need to undergo secondary transfer after leaving the bed, and thus the movable wheelchair is safe and convenient.

The objective of the present invention is to provide: a cushion cell with a new structure which is designed to disperse stresses when the cushion cell is in an inflated state such that excellent durability is achieved and in which a large support area for the human body can be obtained with excellent space efficiency relative to a square shaped space for disposal in an inflated state; and a cushion body with a new structure using the same. The cushion cell is formed with a fluid chamber inside and the height of the cushion cell can be changed by adjusting the pressure in the fluid chamber. The planer shape of the cushion cell in a deflated state is a square shape, and each side part has a curved shape protruding outwards.

The invention provides a medical nursing pad for preventing bedsore. The medical nursing pad comprises a surface layer, a core layer and a bottom layer, wherein the core layer comprises fluff pulp and a super absorbent polymer (SAP) material, and is wrapped with toilet paper; pointy SAPs are distributed on the core layer; an infiltrating liquid is absorbed and locked by the SAPs in an inverted funnel-shaped SAP region of the core layer, so that the reverse osmosis quantity of the nursing pad after liquid absorption is minimized; and meanwhile, water moisture separated from the liquid reaches the bottom layer through a longitudinal moisture channel formed by gaps among fluff pulp fibers in the core layer and determined by a density range, and diffuses out of the medical nursing pad through nanoscale breathable micropores in the bottom layer. The medical nursing pad can quickly absorb and firmly lock the moisture and the reverse osmosis quantity of the nursing pad is minimized, so that the nursing pad is kept dry and comfortable; and meanwhile, the moisture channel can be provided, so that the medical nursing pad can keep a specific function of moisture osmosis, and the purpose of preventing the bedsore is achieved after the medical nursing pad is combined with the specific function.

Intelligent excrement receiving pants are characterized in that a pants body is connected with an excrement receiving bag through a defecation tube, and the excrement receiving bag is disposed in a vacuum barrel with an excrement suction pump to form a excrement discharge and suction system; the pants body is provided with a nozzle, and the nozzle is connected with a three-way electromagnetic valve, a hot air blower, a water pump, a water tank and the like through a tube to form a cleaning system; the nozzle, the three-way electromagnetic valve, the hot air blower and the like form a drying and sterilizing system when the three-way electromagnetic valve is controlled by a microcomputer system to turn on the hot air blower. The intelligent excrement receiving pants have the advantages that the pants are simple and convenient to wear, automatic nursing of bedridden elder people, paralyzed people and the like with gatism is achieved, that is to say, automatic water spraying cleaning, excrement discharge and suction, hot air drying and deodorizing and sterilizing can be performed after defecation; nursing difficulty and tedious labor are relieved, the pants are completely applicable to disabled people, the defecation pain of the disabled people is completely avoided, bed sheets are prevented from being wetted by the defecation of the disabled people, the skin of the disabled people is prevented from being wetted by the defecation, bed sores are prevented, and the pants are widely applicable to families, medical and nursing institutions and the like.

The invention provides a jointless structure that realizes partially bendable and variable-angle bed elastic pads, eliminates dislocations between elastic pads and unevenness between elastic pads, and realizes light weight. The bed elastic mattress with elastic structure is a three-dimensional network structure with elastic structure, which is formed by extrusion molding with thermoplastic resin as raw material or main raw material, forming ring-shaped, disorderly intertwined, partially heated It is composed of continuous hollow wires or solid wires that are adhered; a plurality of continuous grooves are formed from the bottom of the three-dimensional network structure to the top and run through the short direction at specified intervals or appropriate intervals along the long direction; the three-dimensional network When the structure bends upward, the groove expands.

The invention discloses an air cushion bed for preventing bedsore, which includes a body, an air pump, a control device and a plurality of electromagnetic valves. The air cushion bed is characterizedin that the air cushion bed also includes a membrane pressure sensor. The body includes an air cushion surface, an air cushion intermediate layer and two long strip air bags. The air cushion surface layer and the air cushion intermediate layer are composed of multiple rows of independent airbag straps side by side. Each of the airbag strap includes a plurality of independent block airbags; the membrane pressure sensor covers the upper surface of the air cushion surface layer. The membrane pressure sensor includes a flexible membrane and a plurality of pressure sensor units arranged on the flexible membrane. Each pressure sensor unit is in one-to-one correspondence with each block air bag on the surface layer of the air cushion. The air cushion bed has the advantages that: the air cushion bed can prevent the generation of bedsore, adjust the inflation degree of each position of the air cushion bed according to the pressure of each part of the human body, reduce the pressure of the bodysupport when the patient is in bed, and help the patient for whom it is difficult to change the body position independently turn over.

The invention provides a flexible turning-over nursing wheelchair bed. The bed comprises a bed body assembly, turning-over mechanisms and a wheelchair assembly. The wheelchair assembly can be combinedwith the bed body assembly to form a bed posture and also can be separated from the bed body assembly to be converted into a wheelchair posture; the turning-over mechanisms are connected to the leftand right sides of the bed body assembly; a turning-over bed sheet is laid on the upper surface of the bed body assembly; the two ends of the turning-over bed sheet are wound around tubular motors ofthe turning-over mechanisms respectively; a preset height difference is formed when the turning-over mechanisms need to turn over, and in the state, the left turning-over mechanism and the right turning-over mechanism are driven by the tubular motors to enable the left side and the right side of the front or the back of a person to form an angle convenient for turning-over. The tubular motors on one side are supported to a certain height to drive a patient on the bed sheet to rise to a certain height, and then the patient is slightly pushed to turn over, so that manpower is saved, and the patient is protected against secondary injury. The wheelchair can be driven out of a sickbed to be changed into a seat type wheelchair posture, so that the space occupancy is improved and the production cost is reduced.

A negative pressure care bed, including at least a worktable, an armrest, a rocking bed having an upper bed surface and a lower bed surface, a mattress, a body including an upper part and a lower part, multiple excretion holes, a pair of trousers, a bed pan, a waste container having an inlet and an outlet, and a noise reduction oven. The upper part is connected to the lower part via a hinge. A first lifter is disposed on the upper part. A groove is disposed at the bottom of the negative pressure care bed and formed via the worktable and the armrest. The rocking bed is disposed on the groove via multiple bearing supports. The excretion holes are disposed on the mattress and on the lower bed surface of the rocking bed. The trousers are disposed on the excretion hole. The bed pan is disposed in the excretion hole and on the trousers.

The invention discloses a multi-layer bath care bed which comprises a bed frame and a plate bed body. The bed frame is composed of a supporting column, a plate bed frame, a bandage type bounding bed and a sewage collecting device. The bandage type bounding bed is arranged above the plate bed body. The sewage collecting device is arranged below the plate bed body. The supporting column is provided with a lifting hanging device. The four top ends of the bandage type bouncing bed are connected with the lifting hanging device and are vertically lifted and moved. The plate bed body comprises at least three movable plates. Installation frames are arranged around the movable plates which are detachably installed in the installation frames. The multi-layer bath care bed is reasonable in structure, easy to operate, breathable, and capable of solving the problem of urine and excrement and bath of long-term bedridden patients, and allowing the patients to be cared conveniently.

Provided is an air mattress that prevents bedsores from forming on a person lying thereupon. Said air mattress has: a plurality of air cell groups in the long direction of the air mattress, positioned corresponding to at least the head, shoulders, back, buttocks, thighs, knees, and heels of a person lying on the air mattress, each air cell group comprising a plurality of pouch-shaped cells; an air intake / removal pump; and air tubes that connect the pouch-shaped cells to the air intake / removal pump, said air tubes comprising one or more independent first lines, for each air cell group, and one or more independent second lines, for each of specific pouch-shaped cells in multiple air cell groups. A control unit controls the intake and removal of air by the air intake / removal pump such that, at least, the pressure in the air cell groups at the back and thighs is greater than the pressure in the air cell group at the buttocks.

The invention discloses a human body lifting device for a nursing bed. The human body lifting device for the nursing bed is characterized by comprising a mattress and a patient supporting layer; the surface of the mattress is provided with a plurality of protruding portions, and grooves separating the protruding portions are formed between the protruding portions; the patient supporting layer is arranged on the mattress, and the patient supporting layer is composed of a net structure with the shape and size corresponding to the protruding portions and the grooves of the mattress; the patient supporting layer is connected with a lifting driving device and capable of ascending and descending up and down, the patient supporting layer supports up a patient to leave the mattress in ascending, and the patient supporting layer can be embedded into corresponding grooves formed in the mattress in descending; a bed sheet is arranged between the patient supporting layer and the mattress. According to the human body lifting device for the nursing bed, through the mutual cooperation relationship between the specially-made mattress and the net-grid-shaped patient supporting layer, in addition, an existing lifting driving device is used, the patient is lifted up from a bed surface, and the problem that the bed sheet can be replaced for the patient without moving the patient is tactfully solved, the burden of nursing staff is relieved, and the pain of the patient is not increased.

The invention discloses a folding wheel chair with adjustable elevation, comprising a left bracket, a right bracket, a left chair rack, and a right chair rack; the left bracket and the right bracket being simultaneously mounted with front wheel and back wheel; the front, middle and back part of the left chair rack and the right chair rack being respectively mounted with footstep, seat pad, and backrest; a left bearer and a right bearer being respectively fixed on the left bracket and the right bracket, and the left chair rack and the right chair rack being respectively pinned to the left bearer and the right bearer; and a stretching adjusting apparatus being mounted between the left chair rack and the left bracket, and between the right chair rack and the right bracket. The wheel chair is capable of adjusting the frontward and backward elevation angle without upwarp of the wheel chair rack, swinging back and forth to facilitate uphill and downhill or upstairs and downstairs moving, and adjusting seating posture to avoid bedsore.