The acceptance cavity is an interface component of the human-mechanical system, which can comfortably contain the stump and effectively transfer the relevant force to the distal part of the artificial limb.
Therefore, the so-called fit of the acceptance cavity refers to the state of mutual coordination between the acceptance cavity and the stump.
A functional fit of anatomy, biology and biomechanics is a "good fit".
The effect of acceptance cavity depends on the adaptation of acceptance cavity.
When it comes to thigh prosthetics, the first thing you might think of is what brand of knee is, is the knee hydraulic or pneumatic.
What kind of foot plate is the best function.
But in fact, the most important part of the core of the thigh prosthesis is the prosthetic acceptance cavity. Only a good silicone sleeve with a good acceptance cavity can really use the best function of these prosthetic accessories.
Of course, the most important part of a cavity is comfort, and then its stability and controllability.
Among them, stability is particularly important, which can improve the stability of the patient's gait, avoid an amputee will fall to one side when walking, can avoid amputee every step of the body to the side of the prostheses.
Of course, the prosthesis is too short or the prosthesis accessories are loose, etc., which will also cause the situation of walking sideways.
But in the absence of these problems, it is important that the amputee walk without a good balance and the weight of the individual is easily tipped towards the prosthetic.
A lot of people think that if they had a receptive cavity with the ischium containment then they would be able to solve these problems.
The ischium encloses the receptacle inside the receptacle, so that every time we walk, this receptacle is always pushing against our ischium tuberosity, preventing us from leaning sideways.
Full contact receptor retains the advantages of suction receptor and eliminates its adverse effects.
The entire surface of the stump, especially the end of the stump, is in full contact with the receiver chamber.
The end of the stump is subjected to axial pressure from the bottom of the chamber.
During walking, blood is sucked to the end of the stump by negative pressure when swinging the leg, and the stump is pumped out by the pressure of the bottom of the cavity when bearing the support.
Blood flows in and out of the end of the stump repeatedly and alternately, promoting the circulation of the stump.
Generally speaking, the full contact acceptance cavity is made of double-sided, with the ischium inclusive type. The mouth of the acceptance cavity has no ischium platform, and the force is dispersed. The bottom of the stump is stressed according to the situation, and the force around the skin is increased.
It is very simple to examine and determine whether the thigh cavity is fully exposed and the stump is bearing weight.
Under the condition of load-bearing support, the amputee can not only judge by detecting the gap and pressure between the end of the stump and the bottom of the acceptance cavity through the valve hole, but also judge by feeling whether the end of the stump is squeezed.
In order to achieve stump contact and load-bearing, the stump should be well covered with soft tissue, and the shape of the acceptance cavity should be very suitable for the stump.
This puts forward higher requirements for amputation technology and prosthetic limb assembly technology.
At present, the commonly used method of wearing thigh prosthesis has a very adverse effect on full contact and stump bearing.
Today, everyone wears prosthetic legs with socks and valve holes.
Soft tissue is pulled toward the stump.
The load-bearing capacity of the stump is reduced.
The valve orifice at the bottom of the receiving chamber even breaks the contact and load bearing there.
Only by filling the valve hole at the bottom of the accepting chamber with a special valve can we achieve full contact in a true sense.
As long as there is no better way to wear a prosthetic limb, the load-bearing capacity of the stump will not be fully utilized.
In China, the assembly of lower limb prosthesis has not been able to achieve full contact and stump bearing generally, which is not only due to the reasons of understanding, but also due to the reasons of prosthesis assembly technology and amputation technology.
Many amputees and prosthetics technicians do not pay enough attention to this problem.
They fail to recognize that full contact and stump load bearing can affect the health of the amputee's stump and even the whole body.
In order to avoid the trouble caused by the tenderness of the end of the stump in the assembly of the prosthesis, the prosthesis assembly technicians stand on their own side rather than the amputee's side and simply suspend the stump in the acceptance cavity, rather than pursue the goal of full contact and load on the stump.
Amputees readily accept the lack of tenderness.
This lack of awareness, coupled with the lack of pressure from the needs of amputees (a particular consumer), makes it difficult for technicians to pursue advanced technologies that allow for full contact and stump bearing.
Full contact and stump loading put forward higher requirements for the mass of the stump.
Due to the medical community's lack of understanding of the development of prosthetics, surgeons have not been able to create a stump that can achieve full contact and load on the stump.
Bone spurs, neuromas, and bad scarring after surgery hamper the use of new techniques.
We pursue the goal of full contact and stump bearing in order not to affect the arterial, venous and lymphatic circulation of the stump, and not to interfere with nerve conduction.
An acceptance cavity without full contact and stump weight will sooner or later lead to chronic blood circulation disorders and stump swelling until eczema, blisters, chronic ulcers, and especially severe skin changes in the shape of the acceptance cavity.
As a result, the stump loses its load-bearing capacity and can only do so through tighter mouth shape at the top, creating a vicious cycle.
During the initial stage of load bearing, the soft tissue at the end of the stump rapidly atrophies, reducing the pressure on the end of the stump from the bottom of the receiving chamber.
In the initial stage of artificial limb assembly, the bottom of the acceptance cavity should be constantly adapted to the shape of the end of the stump to achieve the maximum load bearing of the stump.
The production of the acceptance cavity of Ubang prosthesis company adopts the international production standard completely, synchronously with the advanced prosthesis technology of the United States, and provides customers with the basic configuration of the full contact acceptance cavity, which has completely changed the manufacturing process of the domestic prosthesis acceptance cavity technically.
Friendly tips: disabled friends must pay attention to the production of the cavity materials, ways and technology, because he is closely related to your walking ability, walking gait and physical health!!
So there is also a lot of attention to the thigh acceptance cavity, which we will unfold little by little!
Pay more attention to our public number, learn more!
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