Miller D L, Doppman J L, Chang R
Diagnostic Radiology Department, Warren Grant Magnuson Clinical Center, National Institutes of Health, Bethesda, MD 20892.
AJNR Am J Neuroradiol. 1993 Sep-Oct;14(5):1075-83.
To evaluate the anatomy of the junction of the inferior petrosal sinus and the internal jugular vein.
Using a previously described classification system, we prospectively classified venous anatomy bilaterally in 135 of 136 persons consecutively undergoing inferior petrosal sinus sampling.
Type IV anatomy, with no anastomosis between the inferior petrosal sinus and the internal jugular vein, was significantly less frequent in our series than in a previous series (1 versus 7%; P < .001). Venous anatomy did not differ significantly between the left and the right junctions or between men and women. Venous anatomy was symmetric in only 65% of subjects (86 of 133). We describe an uncommon variant anatomy, incomplete type IV, found in 4.5% of our subjects (six of 133), that may cause incorrect results of petrosal sinus sampling.
Bilateral sampling of pituitary venous effluent can be accomplished by the methods described, despite the presence of either incomplete or true type IV venous anatomy. Bilateral petrosal sinus sampling is anatomically possible in 99% of persons.
评估岩下窦与颈内静脉交界处的解剖结构。
使用先前描述的分类系统，我们对连续接受岩下窦采样的136人中的135人双侧静脉解剖结构进行了前瞻性分类。
在我们的系列研究中，岩下窦与颈内静脉之间无吻合的IV型解剖结构的发生率明显低于先前的系列研究（1%对7%；P <.001）。左右交界处或男女之间的静脉解剖结构无显著差异。仅65%的受试者（133人中的86人）静脉解剖结构对称。我们描述了一种不常见的变异解剖结构，即不完全IV型，在我们4.5%的受试者（133人中的6人）中发现，这可能导致岩下窦采样结果错误。
尽管存在不完全或真正的IV型静脉解剖结构，但通过所述方法仍可完成垂体静脉流出物的双侧采样。99%的人在解剖学上可行双侧岩下窦采样。
