Recess Surgery Research Articles

SUCESSFULL MANAGEMENT OF CHILDHOOD BASIC-TYPE ESOTROPIA IN ADULT PATIENT

Introduction : Strabismus in adults may indicate other pathological causes, such as neurological disorders or trauma. Diagnosis of esotropia in adult patients has to be made carefully to determine the right treatment. Management’s goal of strabismus in adult patients is mainly cosmetic by diminishing deviation.
 Case Illustration : A 46-year-old woman, complaint of inward deviation of both eyes since childhood. There were no complaints of double vision, headaches, nor trauma history. Visual acuity of right eye was 0.4 with BCVA and left eye was 0.8 with BCVA 0.8. Hirschberg test was 45o (Figure 2A). Prism cover test was 75 PD base out in near and distance. Patient was diagnosed with basic-type esotropia. The patient already given spectacles but the deviation persisted so she underwent bilateral medial rectus recess surgery (Figure 2B). Ocular alignment without spectacles 1 week after surgery showed orthotropia and small esophoria. (Figure 2C).
 Discussion : Each esotropia types has a different treatment approach. Basic-type esotropia with large deviation usually needs surgical treatment. Management of childhood onset strabismus in adult patients is challenging because those patients have lesser ability to maintain fusion. Older patients and large deviation are poor prognostic factors to achieve good functional and cosmetics outcome after strabismus surgery.
 Conclusion : Establishing a definite diagnosis in adult strabismus patients, including esotropia, is challenging. Careful diagnosis and management decision will determine the outcome of the patient’s condition.

Augmented Surgical Treatment in Patient with Partially Accomodative Esotropia

Introduction : Esotropia is a disorder of the position of the eyeball when the eye deviates inward. Surgical treatment is indicated when the eyes are not aligned with the glasses. We report a case of augmented surgical treatment in a partially accommodative esotropia patient.
 Case Illustration : A 18-year-old girl comes to the hospital with vision loss in both eyes since 1 year prior admission. Ocular alignment sinne correction was 300 (Figure 1) and cum correction was 150. Prism alternate cover test (PACT) showed deviation in sinne correction distance 60?BO dan near 50?BO, and deviation in cum correction distance 40?BO dan near 35?BO. Surgical formula with augmented surgery was (60?BO + 40?BO)/2 equal to 50?BO. Patient was diagnosed with Compositus Hypermetropia ODS + Partially Accommodative Esotropia. Patient underwent bilateral medial rectus recess surgery of 6 mm. Ophthalmology examination after 1 and 2.5 month surgery showed ocular alignment without spectacles showed microtropia and with spectacles showed orthotropia (Figure 2, 3a and 3b).
 Discussion : Various approaches can improve outcomes, including using different surgical formulas. Augmented surgery are the mean of deviation with and without surgery as the final deviation surgical formula.
 Conclusion : The amount of surgery in strabismus was based on the size of preoperative deviation. Augmented surgical treatment can be one of the choices to determine preoperative deviation in an esotropia patient.

Tổng quan về hình thái lâm sàng và kết quả phẫu thuật nội soi u nhầy xoang trán sàng

Objectives: To describe manifestation of fronto-ethmoid sinus mucocele and results of endoscopic surgery. Methods: The research method was carried out according to PRISMA-ScR guidelines. The PubMed/Medline database was used to search for studies around the world. Results: Out of 1017 search results, there were 21 studies that matched the selection criteria. The results of a review of 21 studies showed that frontal mucocele had 10 studies with 265 cases, followed by fronto-ethmoid mucocele had 9 studies with 108 cases and ethmoidal mucocele had 2 studies with 74 cases. The common types of sinus surgery methods included endoscopic marsupialization, followed by endoscopic frontal recess surgery, Frontoethmoid surgery and Ethmoidectomy. Conclusion: Frontal mucocele were most mucocele, followed by fronto-ethmoid mucocele and the ethmoid mucocele. The methods showed few complications and were effective in treatment mucocele. The choice of the appropriate surgical method should still be individualized. Keywords: Fronto-ethmoid sinus mucocele, endoscopic surgery.

Anatomical Variations of Uncinate Process in a Tertiary Care Hospital of a Coastal city in Karnataka

Introduction: Superior attachment of uncinate process is the most important anatomical landmark in frontal recess surgery. The uncinate process is an integral struc­ture of osteomeatal complex and prevents the direct contact of the inspired air with the maxillary sinus. It acts as a shield and also plays a role in muco-ciliary activity. Anatomic variations of the uncinate process have surgical implications.
 Aim: This study was done to know the different variations of superior attachment of uncinate process.
 Materials and Methods: In this retrospective observational descriptive study, Computed Tomography (CT) scans of Para Nasal Sinuses (PNS) of 256 patients from Sept 2018 to May 2020 were studied. The results were expressed in percentages and proportions.
 Results: Among 256 CT images, 139 belonged to males and 117 females. In the CT films examined, on the right side, the most common attachment of uncinate was to lamina papyracea which was (64.8%) followed by skull base (19.5%) and to the middle turbinate(15.6%). Similar findings were seen on left side.
 Conclusion: Uncinate process shows different variations in its superior attachment. Superior attachment to lamina papyracea was the most common attachment of uncinate in our study.

Anatomic Variations of Ethmoid Roof and Risk of Skull Base Injury in Endoscopic Sinus Surgery: Statistical Correlations.

Recent developments in endoscopic sinus surgery (ESS) have increased the need to investigate the complex anatomic variations in the ethmoid roof and skull base, to inform the surgeon about the risk of damaging these crucial areas during ESS. To offer a detailed description of sinus anatomy focusing on the key surgical landmarks in ESS and frontal recess surgery to standardize a systematic approach during the preoperative sinuses imaging evaluation.Methodology: A total of 220 computed tomography (CT) scans were reviewed to obtain six sets of measurements: the depth of the cribriform plate (CP); the length of the lateral lamella of the cribriform plate (LLCP); the angle formed by the LLCP and the continuation of the horizontal plane passing through the CP; the position of the anterior ethmoidal artery (AEA) at the skull base; the extent of frontal sinus pneumatization (FSP); the type of superior attachment of the uncinate process (SAUP). The length of the LLCP was statistically significantly correlated with the different Keros classification types, the angle formed by the LLCP with the continuation of the horizontal plane passing through the CP, and with the AEA position at the skull base. The depth of the olfactory fossa was correlated with FSP. According to the Keros and Gera classifications, the data obtained from these evaluations allow the assessment of anatomic-radiological risk profiles and can help identify those patients who are high risk for ethmoid roof injury.

Dual-laser measurement of human stapes footplate motion under blast exposure

Hearing damage is one of the most frequently observed injuries in Service members and Veterans even though hearing protection devices (HPDs, e.g. earplugs) have been implemented to prevent blast-induced hearing loss. However, the formation and prevention mechanism of the blast-induced hearing damage remains unclear due to the difficulty for conducting biomechanical measurements in ears during blast exposure. Recently, an approach reported by Jiang et al. (2019) used two laser Doppler vibrometers (LDVs) to measure the motion of the tympanic membrane (TM) in human temporal bones during blast exposure. Using the dual laser setup, we further developed the technology to detect the movement of the stapes footplate (SFP) in ears with and without HPDs while under blast exposure.Eight fresh human cadaveric temporal bones (TBs) were involved in this study. The TB was mounted in a “head block” after performing a facial recess surgery to access the SFP, and a pressure sensor was inserted near the TM in the ear canal to measure the pressure reaching the TM (P1). The TB was exposed to a blast overpressure measuring around 7 psi or 48 kPa at the entrance of the ear canal (P0). Two LDVs were used to measure the vibrations of the SFP and TB (as a reference). The exact motion of the SFP was determined by subtracting the TB motion from the SFP data.Results included a measured peak-to-peak SFP displacement of 68.7 ± 31.6 μm (mean ± SD) from all eight TBs without HPDs. In five of the TBs, the insertion of a foam earplug reduced the SFP displacement from 48.3 ± 6.3 μm to 21.8 ± 10.4 μm. The time-frequency analysis of the SFP velocity signals indicated that most of the energy spectrum was concentrated at frequencies below 4 kHz within the first 2 ms after blast and the energy was reduced after the insertion of HPDs.This study describes a new methodology to quantitatively characterize the response of the middle ear and the energy entering the cochlea during blast exposure. The experimental data are critical for determining the injury of the peripheral auditory system and elucidating the damage formation and prevention mechanism in an ear exposed to blast.

Prediction of facial nerve fronting with temporal bone high resolution computed tomograph

Objective:To report a new CT measurement to predict the exposure of round window niche during facial nerve recess surgery. Methods:Forty CT scans were measured by conventional facial-round window line and limiting facial-round window line method, and compared with the exposure of round window niche after the opening of the facial recess. Results:There was no significant difference in the sensitivity and specificity of the two CT measurement methods to predict the exposure degree of the round window niche, and the Kappa consistency test of the two methods also showed a strong correlation. Conclusion:The new measurement method can predict the exposure of the round window niche pre-operation, and in practice, it can predict the maximum exposure of the round window niche.

The Anterior Ethmoidal "Genu": A Newly Appreciated Anatomic Landmark for Endoscopic Sinus Surgery.

Human sinonasal anatomy varies widely between patients, challenging surgeons operating in the sinuses. Ethmoid sinus anatomy is so variable it has been referred to as a labyrinth. Accordingly, reliable, consistent anatomic landmarks aid surgeons operating in this region. The goal of this investigation was to explore our observations and hypothesis that the ethmoidal bulla and the uncinate process are not entirely separate structures but rather attach, and the attachment could potentially provide a landmark for surgeons performing ethmoid and frontal recess surgery. Ethmoid sinus anatomy was studied in 57 sinonasal complexes through a variety of methods including gross anatomic dissection, endoscopic dissection and 3D CT stereoscopic imaging. The uncinate process and ethmoidal bulla were noted to fuse at the superior aspect of the hiatus semilunaris in 57/57 cases, forming a genu-like feature in the anterior ethmoid. This consistent anatomic feature related closely to the frontal sinus drainage pathway, which drained medial to it in 44/57 (77%) cases. The anterior ethmoidal "genu" appears to be an excellent anatomic feature that surgeons can use during ethmoid and frontal recess surgery. High resolution 3D stereoscopic CT scan is capable of demonstrating sinonasal anatomy in a detailed fashion previously only achieved by cadaveric dissection. This technology can potentially allow for a virtual dissection of a patient's anatomy prior to surgery and could improve minimally invasive procedures and reduce complications. Clin. Anat. 32:534-540, 2019. © 2019 Wiley Periodicals, Inc.

Endoscopic sinus surgery with and without computer assisted navigation: A retrospective study

ObjectiveIn the last years endoscopic sinus surgery (ESS) is improved with the introduction of computer assisted navigation (CAN). In this retrospective study we evaluated the usefulness of CAN in endoscopic sinus surgery and studied its advantages over conventional endoscopic sinus surgery. MethodsWe retrospectively reviewed the records of 96 patients with chronic rhinosinusitis (CRS). 48 patients undergoing endoscopic sinus surgery with surgical navigation (A group) and other 48 without navigation (B group). Data about percentage of complications, olfactory function (Visual Analogue Scale), Sino-nasal Outcomes Test (SNOT-22), Rhinosinusitis Quality of Life (RhinoQoL), recurrence (CT Lund–Mackay score), total nasal resistance (rhinomanometry) and duration of the intervention were collected and analyzed. ResultsA group evidenced a decrease of recurrence rate (p=0.009), a reduction of total nasal resistance (p=0.007), of frontal recess stenosis (p=0.04) and of nasal symptomatology (p=0.008). QoL had a better improvement in group A. Rate of other complications and olfactory function did not show statistically significant differences between the two groups. The average calibration time was approximately 11min in the A group. Total time of surgical procedure does not evidenced statistically significant difference between the two groups (p>0.05) but if it is considered only the time of the surgical intervention, the difference of duration is significant reduced statistically (p<0.05) in CAN surgery. ConclusionComputer assisted navigation in ESS can be useful for the most experienced surgeons, especially in the frontal recess surgery, decreasing the recurrence rate and reducing the total nasal resistance.

Surgical Management of Ophthalmoplegia

ABSTRACTSurgical management—depending upon the severity of the ophthalmoplegia—ranges from restorative to palliative. In paresis with reasonable residual muscle function and ductions, the goal of the surgery is not only to restore single vision in primary position but also to provide a relatively normal field of single binocular vision. With complete paralysis of a single muscle or more than one muscle served by a single cranial nerve (third), in addition to conventional recess or resect surgery, the transposition of still-functioning muscles is often needed to obtain a durable result and restore at least some field of single binocular vision. In complete ophthalmoplegia, the benefits of the surgery are limited; but even in these cases, surgery can often reduce the need for an awkward head posture and improve appearance.

Analysis of the recurrence related factors of sinonasal inverted papilloma

Objective:To evaluate the influence risk factors of recurrence and the methods for reducing recurrence of sinonasal inverted papilloma (SNIP). Method:Clinical data of 34 patients with SNIP were analyzed retrospectively. All of them were unilateral onset. The diagnosis was confirmed pathologically and the range of lesions was determined by endoscopic and imaging examination; clinical classification according to Krouse classification method; All operations were performed under nasal endoscope, of which 20 cases were operated by simple nasal endoscope, and 14 cases were operated by endoscopic anterior lacrimal recess approach. The patients were followed up for 12-36 months. The curative effects were observed and the prognostic factors of the patients were analyzed. Result:Thirty-four cases of SNIP patients with postoperative recurrence rate was 17.65% (6/34); simple nasal endoscopic surgery in 20 cases, the recurrence rate was 25.00%(5/20); endoscopic anterior lacrimal recess approach in 14 cases, the recurrence rate was 7.14%(1/14), the difference was statistically insignificant (χ²=1.807, P>0.05). Four cases in stage Ⅰ had no recurrence；20 cases in stage Ⅱ, the recurrence rate was 15.0%(3/20); 9 cases in stage Ⅲ, the recurrence rate was 33.3%(3/9); 1 case in stage Ⅳ had no recurrence, the recurrence rate of the patients with different stages were statistically insignificant (χ²=2.692, P>0.05). Conclusion:Simple endoscopic resection of the tumor and endoscopic anterior lacrimal recess surgery are effective methods for the treatment of SNIP. The nasal surgery history and tumor origin are the risk factors for recurrence. The operation completely tumorresection,detailed preoperative examination and postoperative regular endoscopic examination are the keys to preventing recurrence.

The International Classification of the radiological Complexity (ICC) of frontal recess and frontal sinus.

The frontal sinus is considered the most challenging sinus to address surgically. There are no current classifications of the degree of surgical complexity of different frontal sinus configurations. The aim of this study is to develop a classification system of the degree of complexity of frontal recess surgery based on preoperative computed tomography (CT) scans. Authors were asked to submit a classification system. These were circulated to all authors. Selection of the final 3 classifications was based on a majority consensus. These classifications were compared further for time-taken, ease-of-use, and interrater agreement. These were assessed by the authors on 10 CT scans representing a range of anticipated surgical difficulty. Out of 3 compared classifications, classification A was the quickest to score (1.44 minutes vs 1.57 minutes and 2.25 minutes), subjectively easiest (3.23 vs 4.07 and 5 on a visual analogue scale [VAS]), and had a moderate interrater agreement (0.52 vs 0.42 and 0.79). In addition, the grading of complexity was as good whether measurements were taken on the CT scans or whether size of the frontal ostium was visually estimated. We propose a fast, easy classification to anticipate the complexity of surgery in the frontal sinus and recess, for patients undergoing primary surgery.

Implication study of angled handed cutter with suction system in endoscopic frontal recess surgery

Implication study of angled handed cutter with suction system in endoscopic frontal recess surgery

Functional frontal recess surgery under 70 degree endonasal endoscopy

Functional frontal recess surgery under 70 degree endonasal endoscopy

Usefulness of three-dimensional computed tomographic anatomy in endoscopic frontal recess surgery.

The endoscopic bidimensional vision offered by the endoscope during endoscopic sinus surgery involves difficulty in visualizing surgical field depth which makes it difficult to learn this surgical technique and makes it necessary for the endoscopic surgeon to mentally create a three-dimensional (3D) picture of the paranasal sinuses anatomy. In particular, frontal recess surgery requires good knowledge of its anatomic position, also since it is necessary to use angled endoscopes, which distort the view, and angular instruments which are difficult to use. Purpose of this project is to offer to the endoscopic surgeon a detailed 3D model of the nose and paranasal sinuses with particular attention to the frontal recess. A 3D reconstruction of the frontal recess and its related structures, starting from computer tomography scans of the human skull, was realized using a professional 3D graphics software. A detailed reconstruction of the main structures which contribute to form the frontal recess was obtained. Particular attention was paid when reproducing the agger nasi cells, uncinate process, ethmoidal bulla, anterior ethmoidal cells, frontoethmoidal cells and their anatomic variants. This is the first experience reported in literature regarding this new technique of iconographic didactics applied to endoscopic sinus surgery. It represents a new frontier, which surpasses and integrates the previous didactic techniques to help the surgeon to mentally create a 3D image of the paranasal sinuses.

Ophthalmic complications of endoscopic sinus surgery

IntroductionThe proximity of the paranasal sinuses to the orbit and its contents allows the occurence of injuries in both primary or revision surgery. The majority of orbital complications are minor. The major complications are seen in 0.01–2.25% and some of them can be serious, leading to permanent dysfunction. ObjectiveThe aim of this study was to determine the risk and type of ophthalmic complications among patients operated due to a chronic rhinosinusitis. MethodsThis is a retrospective study of 1658 patients who underwent endoscopic sinus surgery for chronic rhinosinusitis with or without polyps or mucocele. Surgeries were performed under general anesthesia in all cases and consisted of polyps’ removal, followed by middle metal antrostomy, partial or complete ethmoidectomy, frontal recess surgery and sphenoid surgery if necessary. The ophthalmic complications were classified according to type, frequency and clinical findings. ResultsIn our material 32.68% of the patients required revision surgery and only 10.1% had been previously operated in our Department. Overall complications occurred in 11 patients (0.66%). Minor complications were observed in 5 patients (0.3%) with the most frequent being periorbital ecchymosis with or without emphysema. Major complications were observed in one patient (0.06%) and were related to a lacrimal duct injury. Severe complications occurred in 5 cases (0.3%), with 2 cases and referred to a retroorbital hematoma, optic nerve injury (2 cases) and one case of extraocular muscle injury. ConclusionsOrbital complications of endoscopic nasal surgery are rare. The incidence of serious complications, causing permanent disabilities is less than 0.3%. The most important parameters responsible for complications are extension of the disease, previous endoscopic surgery and coexisting anticoagulant treatment.

Augmented reality for endoscopic sinus surgery with surgical navigation: a cadaver study.

Augmented reality (AR) fuses computer-generated images of preoperative imaging data with real-time views of the surgical field. Scopis Hybrid Navigation (Scopis GmbH, Berlin, Germany) is a surgical navigation system with AR capabilities for endoscopic sinus surgery (ESS). Predissection planning was performed with Scopis Hybrid Navigation software followed by ESS dissection on 2 human specimens using conventional ESS instruments. Predissection planning included creating models of relevant frontal recess structures and the frontal sinus outflow pathway on orthogonal computed tomography (CT) images. Positions of the optic nerve and internal carotid artery were marked on the CT images. Models and annotations were displayed as an overlay on the endoscopic images during the dissection, which was performed with electromagnetic surgical navigation. The accuracy of the AR images relative to underlying anatomy was better than 1.5 mm. The software's trajectory targeting tool was used to guide instrument placement along the frontal sinus outflow pathway. AR imaging of the optic nerve and internal carotid artery served to mark the positions of these structures during the dissection. Surgical navigation with AR was easily deployed in this cadaveric model of ESS. This technology builds upon the positive impact of surgical navigation during ESS, particularly during frontal recess surgery. Instrument tracking with this technology facilitates identifying and cannulation of the frontal sinus outflow pathway without dissection of the frontal recess anatomy. AR can also highlight "anti-targets" (ie, structures to be avoided), such as the optic nerve and internal carotid artery, and thus reduce surgical complications and morbidity.

Factors Affecting the Outcome of Frontal Sinus Surgery: A Prospective Study

Chronic frontal sinus disease has always been a difficult problem to treat. We undertook this study to evaluate our results of frontal recess surgery, to determine the factors which affected the surgical outcome and to determine whether the post-operative findings correlated with the symptomatic improvement in the patients. Twenty-four patients with chronic sinus pathologies involving the frontal sinus were included in this study. After failure of maximal medical treatment, they were subjected to endoscopic surgery. The factors assessed included the pneumatisation of the frontal recess on CT scan, the technique of surgery, the intra-operative frontal glow, the state of the frontal recess at the end of surgery, the appearance of the recess on follow-up endoscopy and the symptomatic relief in the patients. 81.2% of well pneumatised frontal recesses had a good outcome while only 42.1% of the poorly pneumatised frontal recesses had a good outcome. 76.2% of cases with a frontal glow seen intra-operatively had a favourable surgical result while 44.4% of cases without a frontal glow intra-operatively had a favourable surgical result. Two-thirds (66.7%) of cases with mucosa-lined frontal recess did well post-operatively while only 33.3% of cases with a raw frontal recess did well following surgery. Well pneumatised frontal recesses, presence of an intra-operative frontal glow and a mucosa-lined frontal recess corresponded with better post-surgical outcomes. A difference in the intra-operative technique did not influence the result after surgery. Nineteen out of 24 patients (79.2%) were asymptomatic after surgery while 5 patients had residual symptoms.

Computer-aided endoscopic sinus surgery: a retrospective comparative study

BACKGROUND AND OBJECTIVES:Endoscopic sinus surgery (ESS), markedly improved with the introduction of new preoperative imaging techniques, intraoperative visualization tools, and the use of surgical navigation systems. In this retrospective study we evaluated the usefulness of CT-guided endscopic sinus surgery and studied its advantages over conventional endscopic sinus surgery.METHODS:We retrospectively reviewed the records of 60 randomly chosen patients with chronic rhinosinusitis (CRS) and moderate-to-severe sinonasal polyposis, undergoing endoscopic sinus surgery with surgical navigation (n=30) and without navigation (n=30). Data on the operative note, time of surgery, complications, and recurrence rate were collected and analyzed.RESULTS:Of the 60 patients, 40 (66.7%) were diagnosed with CRS and 20 (33.3%) had allergic fungal sinusitis. Primary surgery was performed in 37 (61.7%) and revision surgery was performed in 23 (38.3%) cases. The computer-aided surgery (CAS) group included 28 (93.3%) patients with extensive disease and 12 (40%) with bone erosions, with intraorbital or extradural extension, while the non-CAS group included 24 (80%) patients with extensive disease and seven (23.3%) with bone erosions, with intraorbital or extradural extension. The average operative time was approximately 13 minutes greater in the navigation group, with significant improvement in the recurrence rate (n=11, 36.7% in the non-CAS group; n=5, 16.7% in the CAS group), and intraoperative complications were fewer in the CAS group (two exposures of orbital fat in the non-CAS group; no complications in the CAS group).CONCLUSION:Computer navigational systems appear to serve as a valuable adjunct in preoperative planning and safe intraoperative dissection.

Management of Frontoethmoidal Cells in Frontal Recess Surgery

Frontal recess surgery is the most demanding and technically challenging part of endoscopic sinus surgery. The complexity of the anatomy and proximity with the skull base, the orbit, and the anterior ethmoidal artery often make the endoscopic approach to the frontal sinus drainage pathway difficult and increase the possibility of complications. The basic key structures to the frontal recess are the agger nasi cell and the superior fusion of the uncinate process. Above the agger nasi, the four categories of frontoethmoidal cells contribute to the complexity of the anterior wall of the frontal recess, and the bulla ethmoidalis, the suprabullar cells, and frontal bulla cells may also narrow the frontal sinus outflow. The supraorbital cells are often associated with low position of the anterior ethmoidal artery. Finally, the intersinus septal cells displace the frontal sinus drainage pathway posterolaterally, draining anteriorly into one or both middle meatuses. Clear understanding of the three-dimensional anatomy of the area is of upmost importance for a successful surgical approach. Thorough preoperative study of the CT scan with graphical reconstruction, as described in the literature, is the best way to achieve this. The concept will be presented with examples of various pathologies and anatomical configurations. The aid of frontal mini trephination and the use of image guidance will be outlined. Finally, the balloon dilatation of the frontal drainage pathway will be discussed, with reference to possible indications and contraindications.