TAILIEUCHUNG - Causation

The main uterine artery and its branches are derivatives of the hypogastric artery. At the level of the internal cervical os, the uterine artery bifurcates into the cervical and corporal branches. At the uterotubal junction, the corporal branch turns laterally and upward toward the ovary where it establish anastomoses with the ovarian artery, forming an arterial arcade that provides perfusion to the upper aspect of the uterine corpus. | Section II Causation 7 DOPPLER EVALUATION OF HEMODYNAMIC CHANGES IN UTERINE BLOOD FLOW G. Urban P. Tortoli S. Ricci M. Paidas P. Vergani and P. Patrizio INTRODUCTION The main uterine artery and its branches are derivatives of the hypogastric artery. At the level of the internal cervical os the uterine artery bifurcates into the cervical and corporal branches. At the uterotubal junction the corporal branch turns laterally and upward toward the ovary where it establish anastomoses with the ovarian artery forming an arterial arcade that provides perfusion to the upper aspect of the uterine corpus. The blood flow takes a linear course in the hypogastric artery then turns into a serpentine course in the uterine artery and finally regains a linear course throughout the gestation as the uterus gradually increases in size. Approximately eight to ten arcuate arteries originate from each uterine branch and envelope both the anterior and the posterior walls of the uterus for about one-third of the thickness of the myometrium1. These arteries take a tortuous course and establish anastomoses with the corresponding arteries from the contralateral side in the midline of uterine myometrium. The radial arteries arise from the arcuate arteries and are directed inward toward the uterine mucosa. The total number is undefined and most likely is dependent on parity and human biodiversity. In the past conventional Doppler techniques have been used unsuccessfully to study uterine hemodynamic patterns in an attempt to provide diagnostic clues for the management of postpartum hemorrhage. Recently however advances in signal acquisition and processing have allowed precise and reproducible analysis of velocity profile patterns and other variables such as wall distension and shear rate at specific sites of the uterine circulation. Several studies have demonstrated a progressive drop in impedance in all the compartments of the uterine circulation from the main arteries to the spiral arteries as

TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.