A study of morphology of abdominal aorta in 50 specimens

Karpagajothi, J (2013) A study of morphology of abdominal aorta in 50 specimens. Masters thesis, Madurai Medical College, Madurai.

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Abstract

The abdominal aorta passed through the aortic hiatus of diaphragm at the level of lower border of twelfth thoracic vertebra in all 50 specimens. • Vertebral level of all the unpaired and paired visceral branches-celiac artery, superior mesenteric artery, inferior mesenteric artery, renal arteries , gonadal arteries were noted. • Vertebral level of bifurcation of abdominal aorta was noted. • The length of abdominal aorta from aortic bifurcation to origin of inferior phrenic arteries which is the upper most limit of abdominal aorta was measured. • The width of abdominal aorta at supra renal level, mid aortic level and just above bifurcation was were measured. • Inter arterial distance between Celiac axis to Superior mesenteric artery (CA to SMA), Superior mesenteric artery to inferior mesenteric artery (SMA-IMA), Inferior mesenteric artery (1MA-AB) were measured. ❖ The course of abdominal aorta and its variations in shape were noted. ❖ Variations in branching pattern of abdominal aorta were noted. The present study revealed a variety of variations. • The vertebral level of origin of celiac axis was in 32% at inter vertebral disc between twelfth thoracic vertebra and first lumbar vertebra (IVD T12-L1), in 40% at first lumbar vertebra(L1), in 28% at lower border of twelfth thoracic vertebra (LT12). • The vertebral level of origin of superior mesenteric artery was in 96% at first lumbar vertebra (L1), in 2% at inter vertebral disc between twelfth thoracic vertebra and first lumbar vertebra (IVD T12-L1) and in 2% at lower border of twelfth thoracic vertebra (LT12). • The origin of inferior mesenteric artery was 72% at the level of third lumbar vertebra (L3), 22% at the level of inter vertebral disc between third lumbar and fourth lumbar vertebra (IVD L3-L4) and 2% at inter vertebral disc between (IVD L2-L3) and 4% at lower border of second lumbar vertebra (LL2). • The origin or renal arteries in 78% on the right side, in 74% on the left side at first lumbar vertebra (L1). In 16% on the right side and 20% on the left side it was at second lumbar vertebra (L2). In 4% on the right side and 2% on the left side it was at the level of inter vertebral disc between second lumbar and third lumbar vertebra (IVD L1-L 2). In 60% right renal artery was proximal than the left renal artery and in 16% both arteries were at same level. In 18% the left one was proximal than the right renal artery. • The origin of gonadal arteries in 94% on both sides were at the level of second lumbar vertebra(L2). In 4% the right gonadal artery was at lower level than the left gonadal artery. • The vertebral level of bifurcation of abdominal aorta in 62% at body of fourth lumbar vertebra (BL4) in 16% at lower border of fourth lumbar vertebra (LL4), in 18% at upper border of fourth lumbar(UL4), in 2% lower border of third lumbar vertebra (LL3 and in 2% at the level of inter vertebral disc between fourth lumbar and fifth lumbar vertebra (IVD L4-L5). • The length of abdominal aorta ranged between 10.4 to 13.1 cm with mean length of 11 cm. • The width of abdominal aorta decreased from proximal to distal it was about 1.84 ± 0.56 cm at supra renal level and 1.69 ± 0.30cm at mid aortic level and L43 ±0.18 cm at just above bifurcation. • Inter arterial distance between celiac artery to superior mesenteric artery (CA-SMA) with mean value of 1.1 cm, superior mesenteric artery to inferior mesenteric artery (SMA-IMA) = 6.14cm and inferior mesenteric artery to aortic bifurcation (1MA—AB) = 3.9cm. • Lateral deviations of abdominal aorta in 6%. • Kinking of aorta in 4%. • Dilatation of aorta in 2%. • Common celiaco mesenteric trunk in 2%. • Accessory renal arteries in 6% (4% bilateral — 2% unilateral left). • Variant origin of gonadal arteries from renal artery in 2%. • The renal origin of inferior phrenie artery along with middle supra renal artery on right side in 2%. • In all the 50 specimens 4 lumbar pairs were seen. • In none of the specimen median sacral agenesis seen. • The present study of morphology of abdominal aorta was thus helpful in regards to diagnosis and management.

Item Type: Thesis (Masters)
Additional Information: Reg.No.20107101
Uncontrolled Keywords: morphology, abdominal aorta, 50 specimens.
Subjects: MEDICAL > Anatomy
Depositing User: Subramani R
Date Deposited: 05 Oct 2019 11:37
Last Modified: 05 Oct 2019 11:37
URI: http://repository-tnmgrmu.ac.in/id/eprint/11693

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