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The ansa cervicalis revisited

100%

Loukas M., Thorsell A., Tubbs R. S., Kapos T., Louis R.G.,Jr., Vulis M., Hage R., Jordan R.

Folia Morphologica

2007

tom 66

nr 2

Recurrent laryngeal nerve paralysis represents a major complication in oesophageal cancer surgery. Nerve-muscle transplantation to the paraglottic space after resection of the recurrent laryngeal nerve with the ansa cervicalis (AC) has recently become the procedure of choice. The aim of this study was to investigate the anatomical variations of AC in order to avoid iatrogenic injuries and facilitate surgical procedures. We examined 100 adult human formalin-fixed cadavers. The ansa cervicalis showed a great degree of variation regarding origin and distribution. The origin of the superior root of AC was found to be superior to the digastric muscle in 92% of the cases. Its vertical descent was found to be superficial to the external carotid artery in 72% and superficial to the internal carotid artery in 28% of the specimens. The inferior root of AC was derived from the primary rami of C2 and C3 in 38%, from C2, C3 and C4 in 10%, from C3 in 40% and from C2 in 12% of the cases. The inferior root passed posterolaterally to the internal jugular vein in 74% and anteromedially in 26% of the cases. The roots of AC were long (70%) or short (30%), and the union between the two roots was situated inferior or superior to the omohyoid. Not only is knowledge of the anatomy of the ansa cervicalis important for nerve grafting procedures, but surgeons should be aware of AC and its relationships to the great vessels of the neck in order to avoid inadvertent injury during surgical procedures of the neck.

Variations in the anatomy of ansa cervicalis

84%

Mwachaka P. M., Ranketi S. S., Elbusaidy H., Ogeng'o J.

Folia Morphologica

2010

tom 69

nr 3

With the emerging utilisation of ansa cervicalis in nerve reconstructive surgery, it is important for surgeons to be conversant with the anatomy of these nerves. This descriptive cross sectional study aimed at describing the morphology and topographic anatomy of ansa cervicalis. We examined 38 adult human formalin-fixed cadavers. The superior root was present in 38 (100%) cases and 37 (97%) cases, on the right and left sides, respectively. More than half (56%) of these roots were located superior to the posterior belly of the digastric muscle. The inferior root, on the other hand, was present in 34 (89.5%) cases on the right side and 31 (81.6%) cases on the left side. Of all the inferior roots, 81.5% were located lateral to the internal jugular vein. The loop was seen in all the cases that had the inferior root, and was mostly (64.6%) located above the superior belly of the omohyoid muscle. Knowledge of the anatomy of ansa cervicalis is not only important for nerve reconstruction surgeries, but also for operations in the neck, so as to avoid injuring the great vessels that are closely related to it. (Folia Morphol 2010; 69, 3: 160–163)

Ograniczanie wyników

2 Folia Morphologica

1 Elbusaidy H.

1 Hage R.

1 Jordan R.

1 Kapos T.

1 Louis R.G.,Jr.

1 Loukas M.

1 Mwachaka P. M.

1 Ogeng'o J.

1 Ranketi S. S.

1 Thorsell A.

1 Tubbs R. S.

1 Vulis M.

1 2010

1 2007

Wyniki wyszukiwania

The ansa cervicalis revisited

Variations in the anatomy of ansa cervicalis