Spinal Nerves

Kennedy Terminal Ulcers and Trombley-Brennan Terminal Tissue Injuries: Mystery Solved?

“…Many arterial aberrancies branch off arteries with smaller diameters than the original arteries 10,11 . Based on Poiseuille’s law, blood vessels with smaller diameters originating from unusual anatomic sites produce significant drops in flow rate in the affected areas at times of systemic hypotension.…”

“…The median sacral artery (MSA) and lateral sacral artery (LSA) provide blood supply to the sacrum and coccyx (Figure 1). 10,11 The MSA is short, measuring 2 to 4 cm in length, and can be located in the midline or on either side of the body 12,13 . According to some studies, it is agenetic in 2.1% of individuals, in which case the sacral area blood supply is dependent on collateral circulation and is likely very susceptible to ischemic insults 10,11 .…”

“… 10,11 The MSA is short, measuring 2 to 4 cm in length, and can be located in the midline or on either side of the body 12,13 . According to some studies, it is agenetic in 2.1% of individuals, in which case the sacral area blood supply is dependent on collateral circulation and is likely very susceptible to ischemic insults 10,11 . When the MSA is present, it originates from the aorta in 90% of cases; third, fourth (most commonly), or fifth lumbar artery in 6% of cases; and common iliac artery in 4% of cases (Figure 2).…”

“…When the MSA is present, it originates from the aorta in 90% of cases; third, fourth (most commonly), or fifth lumbar artery in 6% of cases; and common iliac artery in 4% of cases (Figure 2). 10,11 The MSA is a relatively small vessel measuring approximately 2 mm in diameter. In comparison, the infrarenal aorta measures 2 cm in diameter, the lumbar artery measures 3 mm, and the common iliac artery measures 1 cm 10,11,14 …”

“… 10,11 The MSA is a relatively small vessel measuring approximately 2 mm in diameter. In comparison, the infrarenal aorta measures 2 cm in diameter, the lumbar artery measures 3 mm, and the common iliac artery measures 1 cm 10,11,14 …”