Transorbital approach: a bibliometric analysis from 1948 to 2024

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Abstract

Background
Transorbital surgery has substantially evolved over the last century, with some notable and at times controversial developments, such as its use for transorbital leucotomies, the induction of cerebral ischemia in animal stroke models, and, more recently, the development of neuroendoscopic transorbital procedures. This review aims to analyze the evolution of transorbital surgery from 1948 to 2024 using scientometric techniques, assessing its impact and emerging trends over time, particularly during the past two decades marked by the surge of the endoscopic transorbital approach (eTOA).

Methods
An advanced search of the Web of Science Core Collection was performed using the topic “Transorbital.” Publications from 1948 to 2024 were screened for thematic relevance and analyzed with R (bibliometrix), Python, VOSviewer, Genderize.io, and Microsoft Excel. Scientometric indicators included publication and citation trends, keyword evolution, institutional and geographic output, collaboration networks, and gender distribution. Full and fractional counting were applied for country- and institution-level analyses.

Results
A total of 538 publications were included. Scientific activity increased markedly after 2010, accounting for 64% of all articles and demonstrating higher international collaboration. A thematic shift was observed from early ischemia models toward anatomical and clinical applications of the endoscopic transorbital approach. The most prolific institutions were the University of Naples Federico II, the University of Barcelona, Sungkyunkwan University, and the University of Washington, while the United States, Italy, South Korea, and Spain contributed the largest national outputs. Gender analysis showed persistent underrepresentation of female authors.

Conclusion
The transorbital approach has evolved into a versatile minimally invasive route supported by a rapidly expanding research community. Despite the growth in publication volume and collaborative activity, prospective clinical evidence remains limited. This bibliometric review outlines historical trends, current research structures, and opportunities for future investigation in transorbital surgery.

Impact of removal of the lateral orbital rim on intraorbital pressure during endoscopic trans-orbital approach (ETOA): a cadaveric study

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Abstract

Background

The endoscopic transorbital approach (ETOA) is being established as a new corridor for the lateral portion of the anterior and middle skull base. One of the main concerns is the risk of ophthalmological complications due to orbital retraction. Removal of the lateral orbital rim (LOR) is a simple measure that widens the corridor and may diminish injuries secondary to retraction. This study analyzes the impact of LOR removal on intraorbital pressure (IORP) during the stages of ETOA.

Methods

In this prospective cadaveric study, standard ETOA to the anterior and middle fossae were performed via a superior eyelid crease incision (Fig. 2). On one side, the LOR was preserved; on the other, it was removed. IORP was recorded with an intracranial pressure (ICP) probe during the entirety procedure (Fig. 3). All specimens underwent pre- and post-procedure CT to measure bone removal volume.

Results

Four specimens were used (8 sides, 4 with LOR removal, 4 without). Mean IORP was not statistically different between groups during periorbita detachment, which was prior to LOR removal (117.4 vs 91.5 mmHg, for the LOR removal group and LOR intact group respectively p = 0.217). IORP was consistently reduced in the LOR removal group in every subsequent step (Fig. 3): meningo-orbital band cutting (105.5 to 38.9 mmHg, p < 0.002), temporal fossa drilling (85.3 to 69.5 mmHg, p = 0.232), lateral greater sphenoid wing (GSW) drilling (99.8 to 49.9 mmHg, p < 0.001), medial GSW drilling (85.6 to 17.2 mmHg, p < 0.001), cavernous sinus peeling (85.6 to 3.0 mmHg, p < 0.001). LOR removal increased total bone removal volume from 6.2 cc to 9.4 cc (p = 0.05).

Conclusion

LOR removal decreased IORP, especially when working on the GSW and cavernous sinus, and significantly increased bone removal. These results support LOR removal to reduce orbital retraction stress and widen the working corridor during ETOA.

 
ETOS published articles

ETOS published articles

A list with all ETOS published articles.

A way to improve skull base surgery through the advanced application of endoscopic techniques.

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