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Dilation is a measure of how open the cervical os is. It is usually the most important indicator of progression through the first stage of labour. Dilation is measured by way of a digital cervical exam with the care providers fingers. Dilation is described using centimetres; closed, 1cm, 2cm, 3cm, etc until fully dilated at 10 cm. Fetal station ...
The cervix consists of two parts; the upper part lies in the pelvic/abdominal cavity and the lower part is intravaginal. [1] Cervical effacement or cervical ripening refers to the thinning and shortening of the cervix. This process occurs during labor to prepare the cervix for dilation to allow the fetus to pass through the vagina. While this ...
Hegar dilators are used to induce cervical dilation in order to gain entry to the interior of the uterus. During the process of dilation, the cervix may have to be stabilized with a tenaculum , and then the dilators are slowly entered into the cervical canal with a lubricant, starting with a thin, low Hegar number rod and progressing gradually ...
From that point, pressure from the presenting part (head in vertex births or bottom in breech births), along with uterine contractions, will dilate the cervix to 10 centimeters, which is "complete." Cervical dilation is accompanied by effacement, the thinning of the cervix. General guidelines for cervical dilation: Latent phase: 0–3 centimeters
Rankins says cervical insufficiency happens when there's painless dilation, or opening, of the cervix, typically in the second trimester of pregnancy, or during weeks 13 through 28.
Dilators are primarily used to open and dilate the cervix to gain access to the uterine cavity, but can also be used as sounds. Uterine sounding may be performed prior to embryo transfer to determine the uterine depth and how easily an embryo transfer catheter can be passed through the cervix.
Osmotic dilators are most commonly used to slowly dilate and soften the cervix prior to surgical abortion, a process referred to as cervical preparation. Adequate cervical preparation is important prior to surgical abortions because it helps to prevent complications of dilation and evacuation (D&E), such as laceration of the cervix. [5]
Hematometra is usually treated by surgical cervical dilation to drain the blood from the uterus. [3] Other treatments target the underlying cause of the hematometra; for example, a hysteroscopy may be required to resect adhesions that have developed following a previous surgery. [ 1 ]