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מערכת מיפוי לחצים ממוחשבת

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הושבה מקצועית מתחילה במיפוי לחצים.בחירת כרית ישיבה מקצועית למניעת פצעי לחץ מחייבת התאמה אישית מושלמת.
בחירה לא נכונה עלולה לעלות באשפוזים מיותרים ובסבל רב!מערכת ממוחשבת למיפוי לחצים כוללת משטח מדידה אלסטי, בתוכו מאות חיישני לחץ. המשטח מונח בין הישבן לכרית הישיבה, ומציג מפת לחצים מדויקת של כל נקודת מגע!המערכת מאפשרת ביצוע מדידה השוואתית של כל כרית ישיבה ותנוחת ישיבה, לצורך אופטימיזציה מקסימלית והפחתת הסיכון להתפתחות פצעי לחץ!

Interface pressure mapping involves using sensors to quantify the pressure between two contacting objects, such as a person and their support surface. Pressure mapping has many wide spread applications, but in assistive technology it is commonly used by clinicians to determine the suitability of a wheelchair cushion and by researchers investigating support surfaces, risk factors for ulceration, and ulcer prevention protocols. Pressure mapping systems can be made in many configurations for different uses but the most commonly encountered clinically are the thin mats used by seating specialists. These mats are approximately 18” by 18” and are composed of a matrix of small sensors and a cover. When a person sits on such a mat, the sensors read pressure at individual locations on the thigh or buttock. This data is transferred to a computer where a clinician can analyze it. Evenly distributed pressure is preferred.

How It Works (Technical Description)
The FSA pressure mapping system is based on Piezo Resistive Technology. This means that the resistance changes with applied pressure.
FSA has a proprietary piezo resistive semi conductive polymer sandwiched between two layers of highly conductive rip stop nylon fabric. The floating sandwich allows conformability to the compound curved surfaces of the seating environment as the slippery layers move freely and minimizes hammocking.
The changes in resistance which result from the different pressures on the semi conductor are interpreted by the Interface module and relayed to the computer where they are displayed as an array of colors and digital pressure values. Corrections are made along the way for hysteresis (direction of loading) and creep (changes with time) and individual sensor variations.
How much protocol alignment there is in the field for moving patients ever 2-4 hours but the US NPUAP (National Pressure Advisory Panel) recommends repositioning bed-bound persons at least every 2 hours and chair-bound persons every hour. Chair bound persons who are able, should shift every 15 minutes to redistribute/relieve pressure. I hope you find the attached Pressure Ulcer Prevention points useful – see section IV, item #1 and #3.
FSA pressure mapping for hospital/nursing home beds can be used for:
• Making pressure reducing changes in patients bed surface
• Positioning
• Monitoring
• Bed selection
• Providing early alert to potential damages before the patient goes to the operating room and is rendered immobile
• Enhancing pure clinical reasoning by giving caregivers an “objective” tool to assess pressure and make changes (surface selection, positioning, monitoring(
• Developing guidelines for the hospital for when and how to use pressure mapping (e.g. conduct pressure mapping/risk assessment ahead of operations(
• Training caregivers
A bit of background for you about the US case and how this is impacting the use of pressure mapping in hospitals/nursing homes. Recently (October 2008) there has been a “game changing” regulatory amendment in the United States. Prior to the regulatory change, pressure ulcers originating within a hospital were reimbursed through Medicare/Medicade. However, now the burden of preventing pressure ulcers rests with hospitals.
This new regulation is focusing the health care sector’s attention on the prevention of pressure ulcers and, in the process, has heightened demand for pressure mapping. Like elsewhere, budgets are on hold in the US too but based on the regulatory amendments our conversation with wound care specialists has been extremely positive over the past two quarters. When budgets open up again we expect significant pull for pressure mapping as a tool in the pressure ulcer prevention toolkit.
Other documents on the NPUAP website you may want to refer to:
• Curriculum to prepare RN’s for minimum competencies for pressure ulcer prevention.
• S3I (Support Surface Standards Initiative) for comparing pressure redistribution surfaces – see
• S3I Terms and Definitions related to Support Surfaces – see:
Shear forces are well documented as causative factor of pressure ulcers. As a distributor, I think the first step for sales to hospitals is to educate them on the need to pressure map in general. Once they are “sold” on pressure mapping, the next phase would be to have a discussion with them about shear. More information on shear at: and attached.

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