developmental pelvic abnormalities
Introduction
Introduction The developmental pelvic abnormality is narrow in the front half of the entrance surface of the pelvis. It is not suitable for the connection of the occipital part of the fetal head. The latter part is wider, and the fetal head is easy to connect with the posterior or occipital position. Abnormal pelvis is affected by race, genetics, nutrition and other factors during its development. Its shape and size vary from person to person. Shapiro is divided into four types according to pelvic morphology: female, male, flat and sputum. In fact, the pelvis that fully conforms to these four forms are rare, and most of them are mixed types. Pelvic disease or injury can also cause developmental pelvic abnormalities.
Cause
Cause
First, developmental pelvic abnormalities:
The pelvis is affected by ethnic, genetic, and nutritional factors during its development. Its shape and size vary from person to person. Shapiro is divided into four types according to pelvic morphology: female, male, flat, and sputum. In fact, the pelvis that fully conforms to these four forms are rare, and most of them are mixed types.
Second, pelvic disease or injury:
1, vitamin D deficiency disease pelvis: due to insufficient supply of vitamin D in childhood or long-term not sun, the formation of vitamin D deficiency pelvis is mainly due to the patient's weight and the mechanical effects of muscle ligament on the pelvic traction, followed by Pathological changes in the development of pelvic bones are now rare.
2, osteomalacia pelvis: Vitamin D deficiency occurs in adults with osteophytes have been called osteomalacia.
3, pelvic fractures: more often after a car accident or falls.
4, pelvic tumor: rare. Pelvic chondroma, osteoma, chondrosarcoma have been reported.
Examine
an examination
X-ray examination can be diagnosed.
Diagnosis
Differential diagnosis
Funnel-type pelvis: The diameter of the pelvic inlet plane is normal, but the middle pelvis and the exit plane are narrow, and the sides of the pelvis are inclined inward like a funnel. Pelvic measurements and diagnosis can be performed by means of CT and related means.
Humanoid pelvis: The entrance is oblong, and the anteroposterior diameter of the entrance is larger than the transverse diameter. The two sides of the pelvis are slightly cohesive, and the ischial spine is more prominent. The sciatic notch is wider, the pubic arch is narrower, and the tibia is inclined backwards, so the anterior part of the pelvis is narrower and the posterior part of the pelvis is wider. The tibia often has 6 knots, and the apes-like pelvis is deeper than other types. Women in China account for about 15%.
Spinal lesion pelvic deformity: one of the types of pelvic deformities. 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.
Flat pelvis: refers to the narrow entrance plane of the pelvis, shortened anteroposterior diameter, flat shape, hence the name. Due to childhood rickets, the bones are softened, the pelvis is deformed, the tendon is pressed forward and the appendix bone protrudes forward in the exit plane, and the ischial tuberosity is everted, so the transverse diameter of the outlet is widened except for the shortening of the anteroposterior diameter of the entrance. A preliminary diagnosis can be made by pelvic measurements. At the end of pregnancy or after labor, the sagittal suture of the fetal head can only be connected to the entrance.
X-ray examination can be diagnosed.
