1 / 6

Mechanism of labour

Mechanism of labour. Descent. Relation to practice. Primip -may occur before the onset of labour Multip -not until onset of labour due to laxity of uterine/ abdo muscles Educate re optimal fetal positioning Adequate abdominal palpation Upright and mobile once in

price-grant
Download Presentation

Mechanism of labour

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Mechanism of labour Descent Relation to practice Primip-may occur before the onset of labour Multip-not until onset of labour due to laxity of uterine/abdo muscles Educate re optimal fetal positioning Adequate abdominal palpation Upright and mobile once in Labour, continual support The fetus begins to descend into the pelvis due to the force of gravity and downward pressure of the contractions Claire Allan

  2. Mechanism of labour Flexion Relation to practice Upright position to assist with gravity When resting, adopt the left lateral position (OFP) Observation of the contractions-are they regular, do they appear to be increasing in strength and becoming expulsive? As the fetus descends the chin touches the chest (arms begin to cross) and the attitude of flexion is adopted. This is increased further when the head meets the resistance of the birth canal Claire Allan

  3. Mechanism of labour Internal rotation Relation to practice Fully dilated, station of the head Vertex may or may not be visible Upright position-kneeling, squatting May be spontaneously pushing Would you encourage mechanical pushing or allow for natural descent? As the occiput reaches the resistance of the pelvic floor, it rotates forward 45 degrees. The slope of the pelvic floor aids this rotation forward and allows the head to emerge in the longest diameter of the pelvis (anterposteior) Claire Allan

  4. Mechanism of labour Crowning Relation to practice May be spontaneously/mechanically pushing or still breathing through contractions, how long can the second stage last? Introverted in her behaviour and may adopt alternative Position, bending towards the floor with knees apart The head has crowned when it escapes under the pubic arch and no longer recedes between contractions because the widest transverse diameter of the head is born Extension With slight extension the bregma, forehead, face and chin will pass over the perineum and the head is born Claire Allan

  5. Mechanism of labour Restitution Relation to practice No need to do anything, allow time for restitution (you may see a small part of the anterior shoulder). Wait for the next contraction to deliver the remainder of the body (Dr’s are often too quick in trying to deliver the body) When the head is born it will turn to the left or the right, righting itself with the shoulders. The shoulders then rotate (similar action to that of the head) and lie in the anteroposterior diameter of the pelvis. Rotation follows the same direction as restitution Claire Allan

  6. Mechanism of labour Lateral flexion Relation to practice If the woman is on all fours or leaning forward then the posterior shoulder may be born first due to gravity and the effect of the birth canal- the curve of carus-this causes the trunk of the baby to flex sideways as it is born In most supine or semi recumbent birthing positions the anterior shoulder will be born first (under the pubic arch) and the posterior shoulder will pass over the perineum Claire Allan

More Related