CN-122003221-A - Mattress with cushion for treating bedsores by restoring arterial blood supply

Abstract

The application relates to a medical device which, through an alternately pressurized tubing system, simultaneously exposes a small portion of the epidermis to both microsuspension and massive arterial inflow. Arterial blood can no longer pass through the capillaries due to the pressurized tubing [ 7 in fig. 6 ], because they are subjected to a greater pressure than without the device, and are forced to pass through the capillaries [ 8 in fig. 6 ], while the capillaries appear to be suspended in the air because they are no longer in contact with the support surface. Since the device is periodically operated, this means that wherever the lesion is located, there is more arterial blood flow through the lesion than before.

Inventors

• A. Valeri
• G. Valeri

Assignees

• 菲利普罗麦蒂有限责任公司(共益公司)

Dates

Publication Date

20260508

Application Date

20241001

Priority Date

20231002

Claims (5)

1. 1. A medical device [ fig. 1] for treating bedsores, comprising: a) Mattresses made up of n sets of flexible tubing [2 in fig. 1], which are interconnected to form a single, continuous and uninterrupted surface that is arranged over the mattress according to the length of the underlying mattress and is penetrated by a fluid, liquid or gas; b) The tubing of item a), all tubing having the same diameter in the same device; c) A fire-resistant sheath capable of being cleaned and sterilized at 90 ℃, comprising all the pipes according to item a); d) A cushion layer also shaped similarly to the mattress of items a), b), c); e) A manifold [3 in fig. 1 ] located below the blanket, connecting a set of tubes, and distributing a fill fluid, i.e., a liquid or gas, pushed by a compressor such that all tubes except a set of tubes [ tube (b) in fig. 6 ] are at zero pressure, all tubes are at maximum pressure [ tube (a) in fig. 6 ], and pressurized in a periodic pattern such that each set of tubes has its maximum pressure and zero pressure periods [ fig. 3, 4, and 5]; f) A container [ 4 in fig. 1] located on the bed end, the container containing all the tools required for the operation of the device; And It is characterized in that the method comprises the steps of, Pressure ψ= (τ+σ P ) Wherein τ [ 6 in FIG. 6 ] represents the pressure exerted on the pressurized conduit -Wherein "σ P " [ refer to equation (6) on page 14 and equation (7) on page 15) ] represents the uniformly distributed local pressure generated by the patient's own weight in the body area where the bedsores are located; Multiplying by time (lambda) -Sum of { [ Represents the total pressurization time of one of the n sets of pipes in one complete operation cycle [ reference expression (4) ]}; The following inequality based on the values of b.s.a. (body surface area, equation (5)), namely: a) For patients with body surface areas greater than 1.50m 2 , it must be (Psi x lambda) less than or equal to 1,150mmHg x 1' min B) For patients with body surface areas less than or equal to 1.50m 2 , it must be (Psi x lambda) is less than or equal to 770mm Hg x 1' min.
2. 2. The device according to claim 1, It is characterized in that the method comprises the steps of, When the decubitus is in position (8) in fig. 6, the value of the pressure (ψ R ) that has to act on the capillaries flowing into the decubitus has to satisfy the following inequality: (ψ R ）≥ 1.5（β R ) -wherein ψ R =kψ [ reference expression (10) ] -Wherein there is a k reduction coefficient [ reference expression (11) ] -Wherein β R =70% β [ reference expression (8) ] -Wherein β = a variable according to Redfern s [ Lancet 1973 (page 14) ] → 120mmHg +.β +.170 mmHg.
3. 3. The device according to claim 1 or 2, It is characterized in that the method comprises the steps of, The diameter (phi) of the conduit of the device must be between the following dimensions 20mm ≤ Φ ≤ 40mm。
4. 4. The apparatus of claim 1, 2 or 3, It is characterized in that the method comprises the steps of, It must consist of a set of n pipes of not less than 3, so that: The number of the pipelines is more than or equal to 3 groups.
5. 5. The device according to claim 1 or 2 or 3 or 4, The method is characterized in that: The four conditions described above must be met simultaneously.

Description

Mattress with cushion for treating bedsores by restoring arterial blood supply Technical Field The invention is suitable for the medical field, more precisely for the research and treatment of pressure sores or bedsores. It is well known that bedsores are injuries to the skin and subcutaneous tissue, caused by the long term compression of soft tissue (skin, subcutaneous tissue, muscle) between an upper bony prominence and a lower external support surface. This compression can impede the normal flow of blood and, therefore, these tissues are susceptible to necrosis due to malnutrition. Thus, bedsores are formed largely in the bony prominences (sacrum, ischial bones, heel, nape, spine), with soft tissues pressed therebetween by the hard support surface. Background At the beginning of the last century, an italian doctor recommended that the patient not remain in the same posture for more than two hours. It is known at that time that a patient remains in a fixed position for a long time and that bedsores can result, and it is therefore recommended to let the patient move, for example to let him start in a supine position, tilt first to one side and then to the other side, raise the legs, torso etc. The purpose of this method is to prevent the bony prominences from pressing against the corresponding soft tissue for more than 2 hours so that the pressed soft tissue can regain arterial blood supply before the next compression. In 1930, the Landi doctor measured an average local arteriole pressure of the skin of about 32mmHg, and thus, a pressure of more than 32mmHg was applied to a certain portion of the skin for a sufficient time, which resulted in bedsores. Currently, all "guidelines", starting from the U.S. health care and rehabilitation Agency (AHCPR), up to Norton d, mc Laren r, and Exten Smith in the 1962 "hospital senior care problem survey", up to Policlinico s Orsola Malpighi by the bolonia hospital group, a.i.s.le.c. in the posture change guideline, 1995, and Patterson JA and Bennet r.g. in the 1995 "prevention and treatment of decubitus ulcers, suggest that no pressure exceeding 32mmHg should be applied to the skin for more than 2 hours, as this would result in the formation of decubitus ulcers. Cucinotta D doctor suggested that in both the pathophysiology of decubitus ulcers and the critical aspect of geriatric care published in 1995, compression time should be significantly shortened, since decubitus ulcers do not depend solely on pressure. In fact, the formation of bedsores also depends on the local skin thickness (thickness depends on the age and health of the patient), various hemodynamic factors, blood viscosity, hematocrit, obesity, urinary incontinence, malnutrition, etc. In view of the above, the most advanced technology at present is that of a number of anti-decubitus mattresses and/or mattress cushions which function by the principle of alternately applying pressure and releasing air, so as to distribute the patient's weight evenly on the same body surface and to change its posture every 2 hours. The "alternating pressure device" consists of a set of interconnected ducts (or buffers) which, by alternating inflation and deflation, prevent the body pressure from acting continuously in the same skin area, and by alternating the extent of the ducts, allow the pressure in the same area to last for less than 2 hours. These devices attempt to utilize the pressure in the conduit, typically above 32mmHg, to deliver arterial blood flow to the bed sore to heal the bed sore by providing nutrition, but as we will later demonstrate, the pressures used are lower than those needed to combat the bed sore, and therefore they do not achieve the benefits they wish to achieve. The "ventilation means" also consist of a set of interconnected tubes (or buffers) made of porous fabric, which allow air to flow from the outside to the patient, in addition to pressure variations due to the patient's weight. This air flow helps control humidity and prevents damage caused by skin maceration. There is also what is called a "fluidization air device", whose air flow is dynamic. The device consists of a bed of siliconized microspheres, which are encased in a gas permeable liner and kept fluidized by a stream of hot air, so as to continue movement. Therefore, the body is suspended, which not only can well disperse the weight, but also can ensure the continuous movement of the patient, thereby avoiding the occurrence of bedsores. Among the myriad systems for preventing decubitus ulcers, we have to consider the patent number "US5010608" available from Barnett Richard doctor, usa, month 4, 30, 1991, which is entitled "support system for reducing pressure sore formation". The patent states that the device, which consists of "N" sets of flexible tubing, can vary the pressure on the body by inflating all but one of the tubing and alternately inflating and deflating the tubing in order to mobilize the patient and thereby minimize the