Osteomalacia pelvis

Introduction One of the causes of dystocia is a deformed pelvis that has lost its normal shape of the pelvis. Due to lack of calcium, phosphorus, vitamin D and ultraviolet radiation, the bone mineralization disorder in adulthood is replaced by bone-like tissue, and the bone is decalcified, loosened and softened. Common osteomalacia The symptoms of the pelvis are pelvic malformations, which generally need to be differentiated from spinal pelvic deformities, stenotic pelvis, flat pelvis, developmental pelvic abnormalities, middle pelvic stenosis, head basin nickname, and flat pelvis.

Cause

Due to lack of calcium, phosphorus, vitamin D and ultraviolet radiation, the bone mineralization disorder in adulthood is replaced by bone-like tissue, and the bone is decalcified, loosened and softened.

an examination

Related inspection

Pelvic tilt test pelvis measurement of bone and joint plain bone and joint soft tissue CT examination of extremities

Due to the trunk gravity and the two bones are pressed inward and upward, the condyle is forward and the pubic symphysis protrudes forward. The entrance plane of the pelvis is concave and triangular, and the diameter of the trochanter and the diameter of the ischial tuberosity are significantly shortened. In severe cases, the vagina cannot accommodate 2 fingers. The full-term fetus cannot pass.

Differential diagnosis

Common osteomalacia Symptoms of the pelvis have pelvic deformities that need to be distinguished from the following symptoms:

Spinal lesion pelvic deformity: Spinal lesion pelvic deformity is one of the types of pelvic malformations. Also called the hunchback pelvis. Spinal lesion pelvic deformity refers to the shape of the pelvis caused by the disease of the spine, and the size is inconsistent with the normal pelvis. The pelvic deformity of the female is mainly caused by the delivery of the fetus during pregnancy and delivery, which is a cause of dystocia.

Narrow pelvis: The pelvic diameter is too short or abnormal, resulting in the pelvic cavity being smaller than the limit of the first exposed part of the fetus, which hinders the decline of the first exposed part of the fetus and affects the smooth progress of the labor process, called the stenosis. A narrow pelvis can be too short or multiple short lines, or a narrow plane or multiple planes. When a radial line is narrow, it is necessary to observe the size of other radial lines in the same plane, and then comprehensively analyze the size and shape of the entire pelvis to make a correct judgment.

Flat pelvis: The anterior and posterior diameter of the pelvic entrance is shortened, and the transverse diameter is normal. It is mostly the result of childhood rickets. The characteristics of this type of pelvis are: the sloping forward, protruding into the pelvic inlet, shortening the anteroposterior diameter of the entrance plane, and moving the lower part of the tibia backward, so the diameter of the pelvic and outlet is normal, even slightly larger.

Developmental pelvic abnormalities: the anterior half of the pelvic entrance plane is narrow, not suitable for the connection of the fetal head occipital, the latter half is wider, and the fetal head is easy to connect with the posterior or occipital position.

Middle pelvic stenosis: the pelvic inlet diameters are in the normal range, the entrance can be no head basin, but because the pelvis is funnel-shaped, the smaller the downward (the middle pelvis and pelvis outlet is narrow), resulting in malposition of the fetal position and dystocia.

The head basin is not called: if the maternal pelvis is narrow or the head of the fetus is too large, it cannot pass through the birth canal during childbirth; or the pelvis is normal, but because the head of the fetus is too large, it cannot pass through the birth canal. This phenomenon is called the head basin. Not called."

Flat pelvis: refers to the narrow entrance plane of the pelvis, shortened anteroposterior diameter, flat shape, hence the name.

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