131 results about "Pressure Ulcer Prevention" patented technology

The invention discloses a method and a system for preventing a pressure sore pad based on deep Q learning and an attention mechanism. The method comprises the steps that pressure distribution data and posture data of a patient are collected through a pressure sensor and a posture sensor, normalization processing is carried out on the collected data, and a standardized state data flow is generated; and constructing a contact surface pressure distribution model of the patient and the pressure sore prevention pad according to the standardized state data flow to obtain a contact surface state matrix and the like. According to the method, a self-attention mechanism and a deep neural network are adopted, a Q learning algorithm is combined, predefined air bag pressure adjustment actions are evaluated and optimized, and an optimal air bag adjustment strategy is generated. The local pressure of the pressure sore prevention pad is adjusted according to the strategy. The state of a patient can be intelligently sensed, pressure distribution of the pressure sore prevention pad can be adjusted in a self-adaptive mode, pressure sores are effectively prevented, and nursing quality and patient comfort are improved.

The invention relates to the technical field of medical auxiliary equipment, in particular to a self-adaptive pressure sore prevention supporting device based on pressure feedback. According to the technical scheme, the self-adaptive pressure sore prevention supporting device based on pressure feedback comprises a supporting device body, an adjusting mechanism, an adjusting type supporting plate, an air bag assembly, a pressure sensing assembly, a supporting bracket, a control table, an alarm assembly and an air pump, the adjusting mechanism is arranged on the surface of the supporting device body, and the adjusting type supporting plate covers the surface of the adjusting mechanism; an air bag assembly is arranged on the surface of the adjustable supporting plate, a pressure sensing assembly is arranged in the air bag assembly, and a supporting bracket is arranged on the bottom face of the supporting device body. The pressure monitoring and distribution analysis module is arranged, the flexible film pressure sensor array adopts a piezoresistive sensing unit and temperature compensation film composite structure, full-contact-surface continuous pressure collection is achieved, preventive pressure dispersion is achieved through the intelligent deformation execution module, and shear force damage caused by response delay of a traditional device is avoided.

The invention relates to a multi-modal data driven caregiver training method and device, equipment and a medium, and the method comprises the steps: eliminating the clock deviation of multi-source equipment through the synchronous processing of joint movement, a voice instruction and hand pressure data, and generating a time alignment data set; fusing the nursing action dynamic features and the pressure gradient features by using a time sequence neural network, and constructing a space-time fusion sequence; the joint angle change rate and the pressure parameter are decoded based on a probability model, and an operation continuity index is quantified in combination with time window integration; and finally, identifying weak links of skills according to the mechanical parameter sequence, and matching a clinical standard course library to generate a personalized training instruction. According to the method, the problems of action-instruction collaborative distortion, one-sided single-mode evaluation and feedback disjunction caused by multi-source data time delay are solved, real-time accurate evaluation and immersive adaptive training of nursing operation biomechanical parameters are realized, and the venipuncture stability and the pressure sore prevention force control capability are remarkably improved.

The invention relates to an intelligent dynamic pressure sore prevention nursing bed which comprises a bed frame, a lifting seat, a supporting column array and a control system. The lifting seat is arranged at the top of the bedstead, and an electric lifting mechanism is arranged at the bottom and comprises at least four main electric push rods arranged at four corners of the bedstead. The supporting column array is composed of a plurality of cylindrical supporting columns, and a supporting electric push rod is arranged at the bottom of each supporting column. The control system comprises a main control circuit board, a pressure sensor installed at the top end of the supporting column and action sensors installed on the periphery of the bed frame. A control box is arranged at the side end of the bed frame, detachable vital sign monitoring belts are arranged on the two sides of the bed frame, optical sensors and temperature sensors are integrated in the monitoring belts, and the monitoring belts communicate with a control system through wireless transmission modules. The supporting structure can be dynamically adjusted according to pressure and action information, fitting supporting and vital sign collection are achieved, the intelligent nursing level is improved, and the problems that a traditional pressure sore prevention bed is slow in response and inaccurate in adjustment and depends on wearable equipment are solved.

The invention relates to the technical field of program control, in particular to a program control system and method based on a pressure distribution test. Comprising a multi-dimensional pressure data acquisition unit, a control logic decision unit and a cooperative control unit. Through the combination of the high-resolution flexible sensor array and the deep learning inversion model, the spine curvature and the shoulder-hip proportion of the user can be automatically identified, the shoulder, the waist, the hip and other skeleton protruding parts can be accurately tracked, a unique and accurate personalized physiological model basis is provided for subsequent analysis, and the user experience is improved. A'ideal pressure-bearing database 'constructed based on clinical medical knowledge is embedded, a'digital human' pressure state sensed in real time is compared with a matched'health template ', a dynamic weight mechanism with clinical significance is introduced, and a'pressure-bearing difference value' aiming at preventing pressure sores and maintaining spine health is calculated; the purpose of converting an adjustment target from fuzzy'more comfortable 'into quantitative physiological index optimization with definite health orientation is achieved.

The utility model discloses a pressure sore prevention rescue transfer mattress which comprises a base bed plate, an air cushion layer and a miniature air pump. The base bed plate is made of a hard material; the air cushion layer is fixedly mounted on the upper surface of the board body of the base bed board; air bag assemblies and one-way valve air taps are distributed on the air cushion layer, and the one-way valve air taps are communicated with the air bag assemblies; the micro air pump is detachably connected with the one-way valve air tap through an air conveying pipe in a communicating mode and used for inflating / deflating the air bag assembly. According to the utility model, jolt to a patient in the transfer process can be reduced, and pressure sores of the patient in the observation period can be prevented at the same time.

The utility model relates to the technical field of pressure sore prevention pad, and disclose an alternating inflation's pressure sore prevention pad, including bottom layer cushion, the upper surface of bottom layer cushion evenly installs first gasbag, the upper surface of bottom layer cushion installs second gasbag in the position between first gasbag, between first gasbag and second gasbag all are connected with the inflation flow channel, inflation main road, install in the position of inflation flow channel outer end air inlet, the outer end gas outlet of inflation main road is equipped with electric inflation pump, the outer end of first elastic band is connected with the joint block, the top of second elastic band installs the cylindrical gasbag. This alternating inflation's pressure sore prevention pad, through the two groups of independent inflation gasbag of first gasbag and second gasbag of adding, make can pass through the alternating inflation of horizontal direction and first gasbag, can dynamic adjustment pressure distribution, avoid local sustained pressure, effectively prevent pressure sore, and the cylindrical gasbag of adding further can support waist optimization pressure distribution.

This invention relates to the field of pressure ulcer monitoring technology, specifically disclosing a pressure ulcer prevention monitoring system and monitor. The system includes a data recording module for recording material characteristic data of different types of mattresses and sheets. By recording the material characteristic data of different types of mattresses and sheets, and collecting data on sheet residues and chemical contaminants, the material characteristic data of different types of mattresses and sheets can reflect the friction risk between the patient and the mattress / sheet, while the data on sheet residues and chemical contaminants can reflect the soiling status of the sheet. By combining the above two sets of data, the pressure ulcer risk threshold can be assessed and dynamically adjusted based on diversified data such as the potential friction risk to the patient and the risk of skin irritation from sheet soiling, thereby improving the accuracy of subsequent patient pressure ulcer risk analysis results.

The application discloses a multifunctional pressure ulcer prevention nursing shoe and relates to the technical field of medical devices. The multifunctional pressure ulcer prevention nursing shoe comprises a shoe body, the shoe body comprises a shoe body bottom and a shoe body side, and the shoe body bottom and the shoe body side are combined to form an L-shaped foot accommodating cavity. The inside of the shoe body bottom is provided with a first cavity, and the inside of the shoe body side is provided with a second cavity. A vibration assembly is arranged in the first cavity, the vibration assembly drives the shoe body to vibrate to assist the patient in moving the feet. A monitoring assembly is arranged in the second cavity, the monitoring assembly is used for monitoring the pressure duration of the patient's feet, and when the pressure duration reaches a preset time, a start signal is sent to the vibration assembly. The technical scheme provided by the application can actively remind and assist the patient in moving the feet when the pressure duration is too long.

1. Name of the design product: Main body of the hospital bed (anti-pressure ulcer wooden model). 2. Use of the design product: Used for hospital beds, with functions such as lifting, backrest raising, leg bending, and anti-pressure ulcer. 3. Design key points of the design product: Lies in the shape. 4. Picture or photo that best shows the design key points: Stereogram. 5. Other situations that need to be explained: Other explanations: This design requests partial protection. The part outside the green-covered area is the protected part, and the green-covered area is the unprotected area. This design does not request protection of color.

1. Name of the design product: bed. 2. Use of the design product: air-sand suspension bed for preventing pressure sores and the like in medical treatment. 3. Design points of the design product: in shape. 4. Picture or photograph best indicating the design points: perspective view 1.

The present application relates to the technical field of medical devices, in particular to a face pressure sore prevention device. The device comprises a shell, a liquid storage frame, a monitoring mechanism and the like. A circular hole is formed on the top of the shell. The shell is provided with the liquid storage frame. The liquid storage frame is provided with the monitoring mechanism. The monitoring mechanism is used for monitoring the temperature of the liquid in the liquid storage frame. The monitoring mechanism, the heating pipe and the refrigeration pipe can be used to monitor the water temperature in the liquid storage frame in real time and automatically adjust the heating or refrigeration. The liquid in the input water bag can be maintained in a preset comfortable temperature range. The defects of the prior art that the temperature of the air bag is easily affected by the environment are overcome. The discomfort of the patient's face caused by the overcooling or overheating of the temperature is avoided. The constant warm support can significantly improve the comfort of the patient in the long time prone position treatment, promote the local blood circulation of the face, enhance the tissue tolerance, and further reduce the risk of pressure injury on the basis of dynamic decompression.

The invention discloses a millimeter wave radar-based pressure sore prevention early warning method and system, and the method comprises the steps: collecting a radar echo signal of a bed body region through a millimeter wave radar, and generating point cloud data containing distance and speed information; whether the patient is in bed is judged; when it is judged that the patient is in bed, processing the point cloud data to track the trunk and limbs of the patient; based on the tracking result, large-amplitude body movement and small-amplitude body movement of the patient are recognized through a multi-feature fusion body movement algorithm, and the effectiveness of body position change is judged; and according to the body movement identification and validity judgment result, performing pressure sore risk assessment, and sending out early warning information when the risk exists. According to the method, the defects of a traditional contact sensor and artificial nursing are overcome. Complete non-contact monitoring is achieved, direct contact with the body of a patient is avoided, discomfort, oppression and skin stimulation are eliminated, the risk of cross infection is reduced, information transmission timeliness and response speed are improved, and support is provided for data-driven decision making and medical research.

Systems, devices, and methods of the present application relate to the diagnostic measurement of condition for pressure ulcers. Preferred embodiments utilize pressure measurements at body locations to determine a diagnostic pressure ulcer value. A pressure sensor device generates patient pressure data that is processed by a data processor which utilizes a diagnostic function to determine the diagnostic value that indicates whether corrective action is needed to prevent pressure ulcer formation. One or more sensor devices can be attached to a patient to measure to transmit data for further processing.

According to the technical scheme, the pressure sore prevention cushion comprises a main body and a flexible cushion seat, supporting ribs are arranged at the top of the main body, a supporting groove is formed in the position, located at the gap position of the supporting ribs, of the top of the main body, and the flexible cushion seat is installed in the supporting groove. A sponge supporting column is mounted at the top of the flexible cushion seat, an air inlet branch pipe is mounted in the main body and close to the bottom, an air outlet pipe is connected to the outer surface of the air inlet branch pipe, and an air outlet branch pipe is mounted on the outer surface of the air outlet pipe and located in the flexible cushion seat. The utility model relates to a pressure sore prevention cushion for nursing a patient in an intensive care department, which solves the problems that the existing pressure sore prevention cushion mainly depends on the air permeability of a material, the air permeability is limited, and the possibility that the skin of the patient suffers from pressure sores still exists in the continuous use process of the patient in the intensive care department, and improves the ventilation and air permeability of the pressure sore prevention cushion. Therefore, the probability that the skin of the patient suffers from pressure sores is reduced.

The application discloses a pressure sore prevention device and relates to the technical field of medical devices.The pressure sore prevention device comprises a frame body, a flow guide assembly and an adjusting assembly.A first seat cushion and a second seat cushion are arranged on the frame body, the first seat cushion is used for supporting the buttocks of a patient, and the second seat cushion is used for supporting the thighs of the patient.The flow guide assembly comprises a compression air bag and a supporting air bag, and the compression air bag is connected to the corresponding supporting air bag through a transmission hose.The adjusting assembly comprises a transmission shaft arranged on the frame body and a fixing frame, a rotating shaft is rotatably arranged on the fixing frame, the transmission shaft is in transmission connection with the rotating shaft, a first eccentric wheel and a second eccentric wheel with opposite eccentric directions are arranged on the rotating shaft, the outer circumferential side surface of the first eccentric wheel abuts against the first seat cushion, and the outer circumferential side surface of the second eccentric wheel abuts against the second seat cushion.The pressure sore prevention device solves the technical problem that the existing pressure sore prevention device is unstable in use, affects the use comfort, has certain safety hazards and is difficult to balance the pressure sore prevention effect and use safety.

The utility model relates to a pressure sore prevention raising pad, which comprises a pad body with a wedge-shaped structure on the whole, the pad body sequentially comprises a contact layer, a buffer layer and a support layer from top to bottom, the contact layer is a medical silica gel material layer with a porous hollow structure, the buffer layer is a memory foam layer with a wedge-shaped structure, the front edge of the memory foam layer is 3 mm, and the rear edge of the memory foam layer is 10 mm. And the supporting layer is a medical EVA (Ethylene Vinyl Acetate) foaming layer of which the edge is subjected to chamfering treatment. According to the raising pad, the wedge-shaped buffer layer is combined with the gradually-changed-density memory foam, so that the pressure of high-incidence areas of pressure sores such as heels and sacrum is reduced by 45%-60%; meanwhile, the stability of the gypsum structure is maintained through the EVA supporting layer, and local pressure concentration is avoided.

The utility model relates to the technical field of stomach tube fixing devices, in particular to an adjustable stomach tube fixing device capable of preventing pressure sores. According to the technical scheme, the device comprises a fitting panel and a clamping piece, wherein a connecting piece for rotationally connecting the fitting panel with the clamping piece is arranged between the fitting panel and the clamping piece; a winding cavity is formed in the inner wall of the attaching panel, a winding rod is rotationally installed in the winding cavity, the two ends of the winding rod are connected with the inner walls of the two sides of the winding cavity respectively through first coil springs, a binding band is further wound around the outer ring of the winding rod, and the other end of the binding band is connected with a limiting clamping plate larger than the inner diameter of the winding cavity. The fixing device is novel and compact in structure, adjustable in clamping distance, wide in application range and simple in overall structure, pressure sores on the skin of a patient are avoided, and the comfort level and nursing quality of the patient are improved.

This invention relates to the field of pressure ulcer prevention guiding cannula technology, specifically a pressure ulcer prevention flexible guiding cannula assembly suitable for prone anesthesia. The positioning unit includes a pad fixedly mounted on a connecting plate, a bite tube fixedly mounted on the pad, and a connector fixedly mounted on the end of the catheter. The pad mounted on the bite tube can conform to the patient's face, preventing the bite tube from being too long and causing discomfort when inserted into the patient's mouth. At the same time, the entire device is fixed by a fixing strap fixedly mounted on a rotating shaft. The two fixing straps are fixed with Velcro, which is simple and convenient. After the fixing straps are connected, rotating one of the rotating shafts is controlled by rotating the wheel clockwise. The rotating wheel can drive the fixing strap fixedly connected to it to rotate clockwise through the positioning plate, tightening the fixing strap wrapped around its outer circumference. The other rotating shaft, connected by a large gear, will rotate counterclockwise, loosening the fixing strap connected to it.

The invention relates to intelligent anti-falling and pressure sore-preventing multifunctional nursing clothes and a nursing method thereof. The nursing suit is integrated with a central processing unit, a lining layer, a protective cushion layer, an air cushion layer and an alarm unit, a lining layer sensor group comprises an acceleration sensor, a gyroscope sensor, a pressure sensor and the like, and posture, movement and pressure data of a patient can be collected in real time; the central processing unit processes data and controls the air cushion layer and the alarm unit; the protection cushion layer is provided with a soft protection cushion at an easy-to-injury part, and the air cushion layer is automatically inflated and deflated according to pressure data to prevent pressure sores. Compared with the prior art, the system has the advantages of real-time early warning of falling risks, dynamic prevention of pressure sores, realization of comprehensive intelligent monitoring of patients, improvement of nursing efficiency, high quality and the like.

The utility model provides a pressure sore prevention cushion, and belongs to the technical field of medical instruments. Comprising an elastic pressing plate, the elastic pressing plate is arranged at the top of a bottom plate, a first weakening groove is formed in the inner wall of the elastic pressing plate, a connecting plate is arranged at one end of the elastic pressing plate, an annular base plate is arranged at one end of the connecting plate and slidably sleeved with a groove, and an arc-shaped pressing plate is arranged on the outer wall of the elastic pressing plate; a second weakening groove is formed in the inner wall of the arc-shaped pressing plate Through the arrangement of the adjusting component, when the pressure sore prevention cushion is extruded, the elastic pressing plates deform and are further separated, it can be guaranteed that air can circulate between the two elastic pressing plates, the ventilation effect of the pressure sore prevention cushion can be guaranteed, and when the body position is not frequently changed, the elastic pressing plates can be separated from the elastic pressing plates. By adjusting the contact position of the pressure sore prevention cushion and the skin of the patient, the problem that sweat is accumulated at the contact position of the pressure sore prevention cushion and the skin of the patient to affect the use comfort of the patient can be avoided.

Technical aid device for posture, in particular a positioning cushion (1) for the prevention of pressure ulcers, the device being characterized in that it is provided with a means of electronic identification, either contact or non-contact. Figure for the abbreviation: Figure 1

This utility model relates to the field of pressure ulcer prevention pad technology, and discloses a rope-fixed pressure ulcer prevention pad for geriatric care. It includes a base, with rubber bladders fixedly connected to both sides of the top of the base. A seat cushion is placed on the top of the base; one side of the seat cushion has a 3D mesh fabric structure, and the other side has a fleece structure. Fixing seats are fixedly connected to the four corners of the top of the base. Limiting rods are fixedly connected to both sides of the inner sidewall of the fixing seats. Fixing rods are inserted into the fixing seats, with one end of each rod passing through the four corners of the seat cushion. A protrusion is fixedly connected to the outer side of the fixing rod near the fixing seat. In this utility model, the side of the seat cushion with the 3D mesh fabric facing upwards provides ventilation and cooling; the fatty acid esters liquefy and absorb heat, thus lowering the temperature of the base and seat cushion. Conversely, the side of the seat cushion with the fleece facing upwards provides insulation; the fatty acid esters solidify and release heat, increasing the temperature of the seat cushion. This allows the seat cushion to adjust its temperature according to seasonal changes, thereby improving comfort.

The T-shaped shoe convenient to store comprises a rectangular main piece, a side surrounding piece and a sole piece, a length adjusting belt is arranged on the outer side of the side surrounding piece, a connecting piece used for being detachably connected with the sole piece is arranged on the lower edge of the side surrounding piece, a first through hole is formed in the end, close to the sole piece, of the main piece, and a second through hole is formed in the end, close to the sole piece, of the main piece. The position of the first through hole corresponds to the heel of the foot of the patient, the back face of the foot bottom piece is detachably connected with a back plate provided with a connecting piece, and the back plate is arranged at the end, close to the main piece, of the foot bottom piece, corresponds to the root of the foot of the patient and is arranged in the length direction of the foot bottom piece. The foldable T-shaped shoe is soft in material, can be unfolded and folded at will, is convenient to store and carry after being unfolded, and can be used as a T-shaped shoe after being assembled and being provided with the back plate; after splicing, the main piece, the side surrounding pieces and the foot bottom pieces are attached to the feet of the patient by adjusting the connecting pieces, and the wearing comfort is guaranteed; through holes are formed in the heels, so that pressure sores can be prevented while the foot condition of the patient can be observed conveniently.

The utility model discloses a bone traction lower limbs pressure sore prevention nursing pad, including shank pad, thigh pad and connection cloth piece, shank pad and thigh pad are all made of soft glue material, and shank pad and thigh pad are stacked and fixed on the connection cloth piece from front to back, and there is a certain gap between the rear end of shank pad and the front end of thigh pad, so that the part of the connection cloth piece between the rear end of shank pad and the front end of thigh pad forms a bending part. Advantageous effects: shank pad and thigh pad are all made of soft glue material, and the homogeneous softness is good, compared with the shank and thigh of the leg of the patient needing bone traction directly placed on the brown type support, the shank of the leg of the patient needing bone traction is supported by shank pad, and when the thigh of the leg of the patient needing bone traction is supported by thigh pad, the shank and thigh of the leg of the patient needing bone traction can be prevented from pressure sore, so that the application has good comfort.

The present invention provides a ventilator mask with an anti-pressure sore function, which belongs to the technical field of ventilator masks. It comprises a mask body, which is made of a highly elastic rubber material, elastic straps are fixedly installed on both sides of the mask body, and a connecting seat is fixedly installed in the middle of the top of the mask body. The present invention starts an electric push rod to push the bracket and the adjusting wheel to rotate, and then pulls the mask body. Since the mask body is made of highly elastic material, it can be flexibly adjusted according to actual needs. For example, at different times of the day, the electric push rod is started in the morning to expand the bracket and open the mask body; at noon and at night, the electric push rod is controlled to retract, so that the bracket and the mask body are gradually retracted. This method of adjusting the degree and area of ​​the mask body opening according to time can effectively prevent it from pressing the same position on the patient's face for a long time, effectively reducing the possibility of pressure sores, and providing patients with a more comfortable use experience.

Disclosed are various embodiments for a pressure ulcer monitoring and prevention system. A fabric-based sensing component with a pressure sensing component and / or a moisture sensing component, and interconnections to route signals from one or more of the sensing components to a computing device is provided. An application causes the computing device to determine that an individual is at risk for developing a pressure ulcer. In response to determining that the individual is at risk for developing a pressure ulcer, the application can alert a manual intervention or trigger an automated intervention between the individual and the surface.

The utility model discloses a multi-functional body position pad applied to orthopaedic sub-specialized surgery, which comprises a U-shaped pad body, a protective cover is covered outside the pad body, two end sides of the pad body and / or the protective cover are respectively provided with a quick-release splicing component, the splicing component is used for connecting two adjacent pad bodies, and the splicing component is used for connecting the two adjacent pad bodies. The two side faces of the protective sleeve are connected with detachable binding belts. The multifunctional body position pad applied to the orthopaedic sub-specialized surgery is simple in structure and easy to manufacture and use, can be directly placed on an operating bed or a sickbed, is used for supporting and fixing a patient and enabling the patient to keep a certain posture so as to facilitate surgery, and can also be used in postoperative care or rehabilitation. By using the multifunctional body position pad, the correct body position of the patient can be maintained, comfort is improved, and pressure sores are prevented.

The utility model relates to the technical field of breathing machine pressure sore prevention, and discloses a novel breathing machine pressure sore prevention dressing patch which comprises a first patch, a second cushion pad is fixedly installed on the outer wall of a second patch, two auxiliary patches are fixedly installed on the side, away from a first adhesion layer, of the first patch, and a second cushion pad is fixedly installed on the outer wall of the second patch. The sides, away from the first adhesive layer, of the two auxiliary pastes are fixedly provided with adhesive layers. According to the novel pressure sore prevention dressing patch for the breathing machine, the first adhesion layer and the second adhesion layer are taken down, the first patch body and the second patch body are attached to the mask of the breathing machine, when the mask of the breathing machine is used, the first buffering cushion and the second buffering cushion are attached to the face of a patient, the buffering effect is achieved, and due to the fact that a sliding groove is used for ventilation, the breathing effect is good. The pressure sores can be avoided, and the problem that in clinical care, a self-made gauze pad and the like are attached to the face of a patient, although the pressure sores can be effectively relieved, dressing displacement or falling-off is often caused by breathing, swallowing, speaking, bed movement, sweating and the like is solved.

The utility model discloses a special pressure sore prevention mattress for prone position ventilation, which comprises a latex air-adjusting cushion, a headrest detachably connected with the latex air-adjusting cushion, and fixing straps distributed above the headrest and on two sides of the latex air-adjusting cushion, the latex air-adjusting cushion is divided into an upper layer and a lower layer, the upper layer is an antibacterial and anti-mite latex cushion layer, and the lower layer is an antibacterial and anti-mite latex cushion layer. The lower layer is an inflatable cushion layer which can be inflated and deflated and is made of a PU material, the headrest is made of a water pillow material, and a hollow area for breathing is arranged in the middle of the headrest; the utility model has the advantages of effective prevention of pressure sores, high comfort, good safety, convenience in carrying and easiness in maintenance.