Multimodal Applications of 3D-Navigation in Single-Level Minimally Invasive Transforaminal Lumbar Interbody Fusion: Impacts on Precision, Accuracy, Complications, and Radiation Exposure.

BACKGROUND: Three-dimensional (3D)-navigation in minimally invasive transforaminal lumbar interbody fusion (MI-TLIF) is an evolving procedure. It is used not only for its accuracy of pedicle screw fixation but also for other major steps in transforaminal lumbar interbody fusion. Multimodal outcomes of this procedure are very limited in the literature. The purpose of this study was to examine the application of 3D-navigation in minimally invasive transforaminal lumbar interbody fusion (MI-TLIF). METHODS: Patients who underwent single-level MI-TLIF using 3D-navigation between January 2017 and July 2019 were evaluated for navigation setting time, radiation exposure, volume of nucleus pulposus excised, cage placement, accuracy of pedicle screw placement, and cranial facet-joint violation. RESULTS: One hundred and two patients with a mean age of 60.2 years met the inclusion criteria. The mean presetting time of navigation was 46.65 ± 9.45 minutes. Radiation exposure, fluoroscopy use, and fluoroscopy time were 15.54 ± 0.65 mGy, 4.43 ± 0.87 Gy.cm², and 97.6 ± 11.67 seconds, respectively. The mean amount of nucleus pulposus excised from all quadrants was quantified. The cage was centrally placed in 87 patients, with 95.4% showing a Grade 0 pedicle breach and 94.6% showing Grade 0 cranial facet-joint violation. CONCLUSION: Registration and setting up 3D-navigation takes additional time. The amount of exposure to the patient is much less compared to routine computed tomography, and, importantly, the operating team is protected from radiation. Navigated MI-TLIF has high rates of accuracy with regard to placement of percutaneous pedicle screws and cages with the added advantage of protection of the cranial facet-joint.

Outcomes of Discectomy in Young Adults With Large Central Lumbar Disc Herniations Presenting With Predominant Leg Pain.

STUDY DESIGN: Retrospective cohort study. OBJECTIVES: Discectomy alone or discectomy with fusion have been 2 polarized options in the management of large lumbar disc herniations presenting with leg-dominant pain in young patients. The objective of the study was to evaluate the outcomes of discectomy in young patients with large central lumbar disc herniation (CLDH) presenting with predominant leg pain. MATERIAL AND METHODS: Young patients (<45 years) presenting with predominant leg pain and MRI confirmed diagnosis of CLDH between April 2007-January 2017 were included in the study. All patients underwent tubular microdiscectomy. Outcomes of surgery were evaluated using visual analogue score (VAS) for leg and back pain, Oswestry Disability Index (ODI), and Macnab's criteria. RESULTS: Ninety patients fulfilled the inclusion criteria. The mean age of patients was 34.9 years (range 19-45 years). Mean follow-up was 5.09 years (range 2-10 years). The incidence of CLDH in young adults was 30% and incidence among all "operated" lumbar disc herniations was 15.9%. The mean VAS for leg pain improved from 7.48 ± 0.9 to 2.22 ± 0.84 (P < .05) and the mean ODI changed from 60.53 ± 7.84 to 18.33 ± 6.20 (P < .05). Fifty-nine patients (65.6%) reported excellent, 25 patients (27.8%) reported good, 3 patients each (3.3%) as fair and poor outcomes respectively. CONCLUSION: Discectomy alone for CLDH with predominant leg pain is associated with high success rate and low need for a secondary surgical procedure. Patient selection in terms of leg-dominant pain may be the main attribute for lower incidence of recurrence, postoperative back-pain, and instability needing a secondary procedure. Minimally invasive discectomy may provide an added advantage of preserving normal spinal anatomy, thus minimizing the need for primary spinal fusion in these patients.

Use of Zipper Ratcheting Straps as a Bailout for Postoperative Cerebrospinal Fluid Leaks: Our Experience.

STUDY DESIGN: Technical note. OBJECTIVES: Management of postoperative cerebrospinal fluid (CSF) leaks is a challenge. Reexploration increases the morbidity risks. The main objective was to evaluate the outcomes of noninvasive zipper-like system (Zip surgical skin closure system, ZipLine Medical, Inc, Campbell, CA, USA) as a bailout technique for postoperative CSF leaks. METHODS: Retrospective case series. Consecutive patients with postoperative CSF leaks that occurred secondary to spinal surgeries performed between January 2017 and September 2018 were part of the study. All these patients were managed conservatively by reinforcement with zipper ratcheting straps over the sutured surgical wound. Successful clinical outcomes included cessation of CSF leaks and adequate wound healing in the postoperative period and at follow-up. RESULTS: Ten patients underwent the application of zipper ratcheting straps. The mean follow-up was 6 months (range 6 months to 1 year). In 7 cases, the dural tears were recognized postoperatively and in 3 cases, the tears were noted intraoperatively and repaired and reinforced with fibrin sealants. None of the patients developed wound soakage or subsequent CSF leak from the wound after the application of zipper ratcheting straps. CONCLUSIONS: Zipper ratcheting straps as augmentation to sewing of the wound seem to be a good alternative and bailout in treating patients with postoperative CSF leaks. The ease of its application, the ability in minimizing the complications associated with CSF leaks, and negating the need of surgical reexploration makes it a worthy option.

Does scapular morphology affect the integrity of the rotator cuff?

BACKGROUND: Current evidence suggests that distinct scapular morphologies may predispose patients to a rotator cuff tear. The objective of this longitudinal study was to evaluate the relationship between symptomatic degenerative cuff tears and different radiographic acromial characteristics, including acromion shape, indices (acromial index [AI], critical shoulder angle [CSA]), and acromial spur. METHODS: We divided 166 patients into 3 groups matched for age and sex: group 1, degenerative full-thickness tear; group 2, partial thickness bursal tear; and group 3, normal cuff. Patients were evaluated with standard radiographs and ultrasonography. RESULTS: The presence of an acromial spur was strongly associated with a full-thickness cuff tear (odds ratio, 3.5; P = .001). AI and CSA revealed a statistically significant difference between means of group 1 (P = .006) and group 3 (P < .001). There was no statistically significant difference in means of AI between groups 1 and 2 (P = .695) and between groups 2 and 3, with respect to AI (P = .071) and CSA (P = .125). Receiver operating characteristic curve revealed a higher area for CSA (0.70) than for AI (0.61). Stepwise logistic regression rejected AI as a cuff tear predictor but confirmed CSA and a spur to be stronger predictors of a full-thickness cuff tear. There was no association between the Bigliani acromial type and rotator cuff tear (P = .06). CONCLUSIONS: The presence of an acromion spur is strongly associated with full-thickness cuff tear. Higher AI and CSA are associated with a full-thickness tear but not with partial tears. The type of acromion is not related to cuff tear.

Rotator cuff tears in luxatio erecta: an arthroscopic perspective of two cases.

Luxatio erecta accounts for only 0.5% of all shoulder dislocations. More than 150 cases have been described in the literature, focusing mainly on the method of reduction and/or associated complications. Some of the well-described complications include injuries to the humeral head, glenoid, clavicle, rotator cuff, capsules and ligaments, brachial plexus and axillary artery/vein. Among these, rotator cuff injuries are reported to occur in about 80% of cases. However, in the majority of instances, cuff injuries have been managed conservatively and have been reported to apparently provide optimal functional outcomes. We report our experience with two cases of luxatio erecta associated with massive rotator cuff injuries, which were evaluated and further managed by arthroscopic repair. The emphasis in these cases is to define cuff injuries and proceed based on patients' age, demands and characteristics of the cuff tears. Arthroscopic evaluation and cuff repairs should be contemplated in these patients, to improve shoulder functions.