How to determine narrow pelvis

The presence of a normal pelvis is one of the main conditions of the proper course of labour. Narrow pelvis makes it difficult genera, and sometimes are viewed as insurmountable obstacles when the promotion of the fetal head through the birth canal is suspended. According to statistics, anatomically narrow pelvis is considered to be a pelvis in which one or all of its dimensions are shorter than in normal sizes of 15 – 20 or more millimeters.

Instruction

1. To define a narrow pelvis there are several methods.
   History. At the first appointment with a gynecologist you need to collect history data. Tell him about previous illnesses: rickets, bone tuberculosis, injuries of the pelvis and hip joints, osteomyelitis, prolonged infectious diseases, have occurred in childhood. If you have already given birth, report the previous birth, their duration, the possibility of stimulation of labor activity, the health of the unborn child, its weight and type of delivery.
2. An external examination. Give the doctor the opportunity to conduct a General inspection, including the collection of data on the physical development, growth, and body mass, proportionality of a Constitution, changes in the skeleton and other. Of particular importance for defining a narrow pelvis is the shape of the abdomen. When anatomically narrow pelvis in nulliparous women, she can be spiky, multiparous – pendulous.Measurement of the pelvis is a tool tanamera. Mainly for the inspection is sufficient the following measurements: measurement distance, kristrom, spinarum and trehantiria, as well as the measurement of external conjugates.Know that the outer measure may not fully reflect the structural features of the small pelvis, and its shape and dimensions are approximate values. It is therefore not only based on similar methods of determination. More effective are the internal examination, ultrasound and Rangeability.
3. A vaginal examination. This inspection provides information about the capacity of the pelvis, pelvic eliminates different strain – tumor projections. The doctor will measure your diagonal conjugate and calculate the true. On examination, the midwife pays attention to the entire area of the pelvis, especially the sacral form of a rhombus (or rhomb of Michaelis).
4. Interoperbility. The final diagnosis of anatomically narrow pelvis , you can install on x-ray. The indications for it are: contraction of the external dimensions of the pelvis, his injuries and trauma hip joints, childhood rickets or polio. If you have a height less than 155 cm, you are part of a group of women with a narrow pelvis.Your doctor may send you to interoperabiltiy if there are suspicions on the disproportion between the fetal head and maternal pelvis. These include: large fruit, unsuccessfully risen its head, its long standing in one cavity of the pelvis , or other complications.Digital interoperabiltiy carried out in the late 3rd trimester, no later than 2 weeks before the expected birth or during them. During the procedure you lie on your back or side. This allows you to learn the shape of the sacrum, pubic and other bones. You will measure the direct and transverse dimensions of the pelvis and their ratio with the head size of the fetus.
5. Ultrasound. Ultrasound of small pelvis inferior to his informative x-ray examination, it can only determine the true conjugate of the pelvis, the size of the fetal head and its location, and giving the degree of cervical dilatation.Remember that the structure of the pelvis is key to passing and birth outcomes. Therefore, knowing its shape and size, you and your physician can predict the course of childbirth, to take into account possible complications and methods of delivery.