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Ultrasound in the First Trimester
Published in Asim Kurjak, CRC Handbook of Ultrasound in Obstetrics and Gynecology, 2019
Asim Kurjak, Vincenzo D’Addario
As the chorionic sac grows and protrudes further into the uterine cavity, the decidua can be divided into three parts: the decidua basalis, the decidua capsularis, and the decidua parietalis. The decidua basalis is a part underlying the embryo and forming the maternal component of the placenta, the decidua capsularis covers the chorionic sac, while the remaining endometrium covering the uterine cavity is the decidua parietalis. The chorion frondosum and the underlying decidua basalis form the definitive placental site. The space between the decidua capsularis and parietalis usually contains mucus and sometimes a small amount of blood (implantation bleeding) (Figure 11). For this reason the triangular space can be ultrasonically visualized as a small, triangular echo-free or echo-poor area adjacent to the gestational sac (Figures 12 and 13), or as an echo-free rim surrounding the gestational sac (Figure 14). The latter appearance, greatly depending on the orientation and angulation of the transducer, is also erroneously called “double sac sign” and can be used as a differential sign distinguishing the normal gestational sac from the pseudogestational sac of ectopic pregnancy.16
Hands
Published in Tor Wo Chiu, Stone’s Plastic Surgery Facts, 2018
The RN passes through the triangular space formed by humerus laterally, triceps (long head) medially and teres major superiorly, to lie in the bicipital groove in the posterior compartment of the arm. It pierces the lateral intermuscular septum 10–12 cm above the LE and enters the radial tunnel (from the radial head to the distal edge of the supinator) where it may become compressed.
Upper limb
Published in Aida Lai, Essential Concepts in Anatomy and Pathology for Undergraduate Revision, 2018
Boundaries of triangular space– med.: long head of triceps brachii– sup.: inf. margin of subscapularis– lat.: long head of triceps brachii
Contemporary review of management techniques for cephalic arch stenosis in hemodialysis
Published in Renal Failure, 2023
Gift Echefu, Shivangi Shivangi, Ramanath Dukkipati, Jon Schellack, Damodar Kumbala
The Cephalic vein is part of the upper extremity’s superficial venous system. It originates in the anatomical snuffbox from the radial aspect of the superficial venous network of the dorsum of the hand. Coursing along the anterolateral forearm to the elbow, it communicates with the basilic veins via median ante-cubital veins. It then courses along the lateral aspect of the biceps toward the pectoralis major muscle as it enters the deltopectoral groove (a triangular space formed by the adjacent borders of the deltoid and pectoralis major muscles Figure 2). It then passes under the clavicle, turning sharply to pierce the clavipectoral fascia terminating as the axillary vein. The cephalic arch refers to the final arch of the cephalic vein before it drains into the first part of the axillary vein.
Anatomical feasibility study of the infraspinatus muscle neurotization by lower subscapular nerve
Published in Neurological Research, 2023
Aneta Krajcová, Michal Makel, Gautham Ullas, Veronika Němcová, Radek Kaiser
The triangular space [12] was bluntly dissected between teres minor cranially, teres major caudally and long head of the triceps muscle laterally. After spreading the muscles and identification of the circumflex scapular artery, the LSN was found running slightly medially to the vessel and entering the teres major muscle (Figure 4) where it was cut. It was then dissected proximally as far as possible and its length was measured to the point of arising a branch for the subscapularis muscle. Diameters of both distal stump of the IB-SSN and proximal stump of the LSN were measured by microcaliper. They were then brought together to demonstrate the possibility of performing their end-to-end suture without tension (Figures 5, 6).
Surgical complications of cochlear implantation in a tertiary university hospital
Published in Cochlear Implants International, 2018
Al Hussein Awad, Usama M. Rashad, Nihal Gamal, Mostafa A. Youssif
The reference surgical approach for cochlear implantation is the mastoidectomy with facial recess approach (MFRA) (Clark et al., 1979; Hochmair et al., 1979; House 1976). This approach requires a mastoidectomy and uses the facial recess for cochlear implant (CI) electrode passage from the mastoidectomy to the middle ear (Zernotti et al., 2012). This triangular space is surrounded with the facial nerve posteromedially, the chorda tympani nerve anterolaterally, and the fossa incudis superiorly (Alzhrani et al., 2013).