✅ MECANISMO DE PARTO | OBSTETRICIA 👶

Easy, Practical, and Simple ✅. Learn the BASIC CONCEPTS OF THE LABOR MECHANISM in an easy, fast, and concise way. #Obstetrics #Gynecology #Medicine ———————————————————————————————— 🤩Subscribe at the link below 👇 : ● https://bit.ly/VideosMedicina ———————————————————————————————— 👨‍💼Business Contact ● [email protected] ————————————————————————————————— 💰 Donations (Support to improve my content): ● https://bit.ly/YoApoyoTuCanal ——————————————————————————————— 🙏THANK YOU FOR WATCHING MY VIDEOS🙏 ————————————————————————————————— SUMMARY Delivery Mechanism In this video, we're going to talk about the delivery mechanism in cephalic presentation, the vertex presentation. The most common form of eutocic birth. Concept: It is a combination of simultaneous and coordinated movements that the fetus passively performs during its progression through the pelvigenital canal until it exits the body. At each stage, different movements are performed to accommodate the different axes and diameters of the pelvis. Most movements occur simultaneously, but are described as if they occurred independently for educational purposes. The delivery mechanism consists of four stages: First stage: Accommodation to the superior strait This is accomplished by orientation and diameter reduction. The purpose of this orientation is to match the largest diameter of the presentation with the largest diameter of the pelvis, which is usually achieved by a left oblique diameter. The diameter reduction is achieved by flexion and deflexion movements of the head, obeying the law of levers, where the head is considered a lever with unequal arms: a short one from the foramen magnum to the occiput and a long one from the foramen magnum to the forehead. With contractions and the head in an indifferent position, when it hits the pelvis, the longer arm produces the flexed position. Second stage: Engagement and descent It descends in the same diameter as it had been oriented (oblique), and can do so in the following ways: Synclitic, where both parietal bones descend at the same time. Asynclitic: Posterior or Litzmann asynclitism: if the posterior parietal bone descends first, Anterior or Naegele asynclitism: when the anterior parietal bone descends first; this can be diagnosed by the location of the sagittal suture. The presentation is considered engaged when the biparietal diameter has passed the second Hodge plane, presenting at that moment the steepest point in the third plane. In this way, the maximum circumference of the presentation passes the minimum promontopubic diameter of the pelvis. Third stage: accommodation to the inferior strait The oblique orientation of the presentation with which it descended does not coincide with the diameter of the pubococcygeal fissure of the inferior strait, whose axis is anteroposterior; therefore, it undergoes internal rotation to align its flexion facillium with the curvature of the birth canal. This stage is associated with the accommodation of the shoulders to the superior strait. Fourth stage: Detachment and external rotation of the head The fetus detaches, placing the fulcrum or hypomochlion below the pubis, aligning the point of greatest flexibility with the axis of the birth canal. This is the transformation of the potential energy accumulated during flexion into kinetic energy. It slides around the pubic symphysis in an arch, performing a deflection movement that stretches the perineal musculoaponeurotic plane and retropulses the coccyx. External rotation, away from the genitals, allows the head to move, shifting the occipital bone toward the original side of the birthing mechanism. This allows the biacromial diameter to accommodate the subsacrosubpubic bone of the inferior strait, one shoulder below the pubic symphysis and the other in the sacral excavation, to produce the shoulder detachment. Detachment of the rest of the body: The rest of the fetus emerges quickly without any specific mechanism; hence, it is called detachment.