Method of diagnosing non-fixed (mobile) planovalgus deformity

FIELD: medicine.

SUBSTANCE: invention relates to medicine, namely to radiodiagnostics. Patient is placed on computer tomography (CT) table in lying position. From the side of sole foot surface plate is put and loaded in proximal direction with system of weights, which causes displacements in sole joints characteristic of non-fixed planovalgus deformity. CT table together with patient and system of weights modeling load is placed into working part of CT with soles at specified angle of inclination and layer-by-layer scanning in horizontal plane is carried out.

EFFECT: method ensures increase of accuracy of diagnosing non-fixed planovalgus deformity and allows to select optimal method of operative intervention.

 

The invention relates to medicine, namely to the diagnosis of radiation.

There is a method of x-ray diagnosis planovalgus foot deformity in patient position "standing"when the patient alternately pressurizes the lower limbs and in terms of this static load produced x-rays of the feet in the side and bottom projections (Sadofyev VI Roentgenologically diagnosis of diseases of the musculoskeletal system in children, L.: Medicine. Leningrad branch. 1986). It is known that planovalgus deformity of the feet, and especially its mobile (non-fixed) form, fully manifested only when the effect of body weight on the lower limbs. This method allows to evaluate the relationship of the bones in the ankle-heel-scaphoid and the calcaneal-cuboid joint, the main trends in the displacement of the bones in patternnum joint, as well as by indirect signs position sustentakulum tali. Also known a method of computer-tomographic diagnosis planovalgus deformities of the feet in position of the patient "lying" (Hofer, Matthias. Computer tomography. A basic guide to the Medical literature, 2006). The method allows to diagnose only fixed rigid forms when the difference in the anatomy of the planovalgus foot without load and with load which there is no or minimal.

The disadvantage of x-ray method of diagnosing planovalgus deformity of the foot in the position of the patient "standing" is not informative. This is because this method of study is two-dimensional and not renders sufficiently such important anatomical structures, as sustentakulum tali, and the position of the calcaneus (including valgus), the direction and extent of displacement of the talus in patternnum and ankle joints (including those taking place in the described deformation of the foot, subluxations and dislocations in the frontal plane in the above joints). The main drawback of standard computer-tomographic method of diagnosing planovalgus deformities of the feet is the fact that the survey is conducted with the patient, the foot of which is not subjected to any static load. It is known that planovalgus foot deformity, and especially its non-fixed form, which occurs in the vast majority of cases (as opposed to rigid), manifests itself only when the load of the body weight on the lower limbs. The lack of informativeness of the above methods is the limiting factor in the choice of those or other methods of surgical treatment planovalgus deformities of the feet.

The objective of the proposed pic is BA diagnosis is to improve the accuracy of diagnosing flow planovalgus foot deformity and, as a result, increase the effectiveness of treatment.

The technical result of the task is achieved in that in the method of diagnosing non-fixed (mobile) planovalgus deformities of the feet, including placing the patient on the table computed tomography (CT) in the supine position with the feet in the workspace CT at a given angle of inclination and the subsequent layer-by-layer scanning in the horizontal plane, is available at the foot of the patient to simulate the load for impact on the joints of the foot from plantar surface.

Method of diagnosing non-fixed (mobile) planovalgus deformities of the feet.

The patient is placed on the table computed tomography (CT) in the supine position. Then fixed to the table a wide belts at the waist and knee joints to avoid possible changes in body position in the process of modeling orthostatic stress. Next, from the plantar surface of the feet puts a plastic plate and is loaded in the proximal direction of the cargo system, which causes bias in the joints of the foot, characteristic of the flow planovalgus deformity. Table CT scan with the patient and the system loads, simulating the load is placed in the workspace KG feet under the given angle decl is on. You then layer-by-layer scanning in the horizontal plane. Then the computer produces a three-dimensional image reconstruction, which allows you to visualize the Sustentaculum tali (its size and location relative to the calcaneus), the position directly calcaneus together with the above anatomical structure, the relative positions of the bones of the proximal foot.

The positive effect from the use of the invention is to improve the accuracy of diagnosing flow planovalgus deformities of the feet, allowing you to choose the optimal method of surgical intervention and thus increase the effectiveness of the treatment.

Method of diagnosing flow planovalgus deformities of the feet, including placing the patient on the table computed tomography (CT) in the supine position with the feet in the workspace CT at a given angle of inclination and the subsequent layer-by-layer scanning in the horizontal plane, characterized in that the plantar surface of the feet put the plate and load in the proximal direction of the cargo system, which causes bias in the joints of the foot typical flow planovalgus deformity.



 

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