Although most available IOL power calculation formulas perform accurately for eyes of average axial length, they have been shown to be inaccurate for eyes that have unusually short and long axial length. To compare the prediction accuracy of new Hoffer Q with SRK-II formula, we reviewed, retrospectively, a series of 225 ECCE with PCL implantation cases, including 106 Hoffer Q group and 119 SRK-II group, each of which was further divided into subgroups based on axial length. The Hoffer Q formula overestimated the refraction and resulted in more myopic shift and was less accurate than SRK-II in all length eyes, except short length eyes. In short length eyes, both formulas had similar mean error and mean absolute error but Hoffer Q formula was more accurate than the SRK-II in +/- 0.5D prediction proportion.
Retrospective Studies

No abstract available.
Retrospective Studies*

No abstract available.
Retrospective Studies*

Authors retrospectively analyzed 22 cases of inferior oblique overaction, which were treated by means of infetior tlblique recession from May 1983 to June 1985. We compared preoperative and postoperative hyperdeviation in the primary position and adduction, and calculated the amount of corrected hyperdeviations in the prirrtary position and adduction pet millimeter of inferior oblique recession. The results were as follows: 1. The overall success rate was 84.4 % in primary inferior oblique overaction. 2. The amounts of correction in the primary position per millimeter of inferior oblique recession were 0.69 prism diopter. 3. The amounts of correction in adduction per millimeter of inferior oblique recession were 1.94 prism diopter. 4. Decrement amounts in adduction compared to in the primary position were 1.59 prism diopter per millimeter of inferior oblique recession.
Retrospective Studies

BACKGROUND/AIMS: Although both radial- and convex-arrayed endoscopic ultrasonography (EUS) scopes are widely used for observational EUS examinations, there have been few comparative studies on their power of visualization. The aim of this study was to evaluate the capability of these EUS scopes for observation of the pancreatobiliary junction. METHODS: The rate of successful visualization of the pancreatobiliary junction was retrospectively compared between a radial-arrayed and a convex-arrayed echoendoscope, from a prospectively maintained database. Study periods were defined as January 2010 to December 2012 for the radial group, and February 2015 to October 2016 for the convex group because the respective scope was mainly used during those periods. RESULTS: During the study period, 1,660 cases with radial EUS and 1,984 cases with convex EUS were recruited. The success rates of observation of the pancreatobiliary junction were 80.0% and 89.5%, respectively (p < 0.0001). CONCLUSIONS: The capability of visualization of the pancreatobiliary junction in observational EUS was found to be better with a convex-arrayed than with a radial-arrayed echoendoscope.
Endosonography ; Prospective Studies ; Retrospective Studies

OBJECTIVE: To present the accuracy and safety of cervical pedicle screw insertion using the technique with direct exposure of the pedicle by laminoforaminotomy. METHODS: We retrospectively reviewed 12 consecutive patients. A total of 104 subaxial cervical pedicle screws in 12 patients had been inserted. We also assessed the clinical and radiological outcomes and analyzed the direction and grade of pedicle perforation (grade 0: no perforation, 1: <25%, 2: 20% to 50%, 3: >50% of screw diameter) on the postoperative vascular-enhanced computed tomography scans. Grade 2 and 3 were considered as incorrect position. RESULTS: The correct position was found in 95 screws (91.3%); grade 0-75 screws, grade 1-20 screws and the incorrect position in 9 screws (8.7%); grade 2-6 screws, grade 3-3 screws. There was no neurovascular complication related with cervical pedicle screw insertion. CONCLUSION: This technique (technique with direct exposure of the pedicle by laminoforaminotomy) could be considered relatively safe and easy method to insert cervical pedicle screw.
Humans ; Retrospective Studies

STUDY DESIGN: Retrospective study. OBJECTIVES: To compare the radiologic results of unilateral or bilateral minimal invasive transforaminal lumbar interbody fusion (MIS TLIF) and conventional open lumbar interbody fusion. SUMMARY OF LITERATURE REVIEW: Only a few studies have compared the slip reduction and fusion rate between unilateral or bilateral MIS TLIF and conventional open TLIF. MATERIALS AND METHODS: Between March 2007 and May 2015, 80 patients with single-level low-grade spondylolisthesis underwent unilateral MIS TLIF (26 patients), bilateral MIS TLIF (10 patients), or open TLIF (44 patients) by a single surgeon. Radiologic studies were performed preoperatively, 2 weeks postoperatively, and 12 months postoperatively. Slip reduction, the lumbar lordortic angle, and the fusion rate were analyzed. RESULTS: The 3 groups exhibited significantly improved slip after operation. Significant differences were found among the 3 groups (p=0.015) and between the MIS TLIF group (31.76%±14.42%) and the open TLIF group (41.66%±15.98%) (p=0.01) in the slip reduction rate at 2 weeks after the operation. However, no significant difference was found between unilateral MIS TLIF and bilateral MIS TLIF (37.61%±15.0% vs. 29.5%±13.82%, p=0.148). In the lumbar lordotic angle, no significant difference was found among the 3 groups. There were no significant differences among the 3 groups in slip reduction or the fusion rate at 12 months after the operation. CONCLUSIONS: Our study suggests that unilateral MIS TLIF showed a similar slip reduction and fusion rate to bilateral MIS TLIF, but that conventional open TLIF showed better slip reduction than MIS TLIF, although it had a similar fusion rate.
Humans ; Retrospective Studies ; Spondylolisthesis*

No abstract available.
Liver* ; Retrospective Studies*

Intradural disc herniation is a very rare condition, and multiple intradural disc herniations have not been reported to date. The latter may be confused with intradural extramedullary (IDEM) spinal tumors. Here, we report a case of multiple intradural disc herniations masquerading as multiple IDEM tumors and review the relevant literature. We retrospectively reviewed the patient's medical chart, reviewed the intraoperative microscopic findings, and reviewed of PubMed articles on intradural disc herniation. The masses considered to be IDEM tumors were confirmed to be multiple intradural disc herniations. A nonenhancing mass was found to have migrated along the intra-arachnoid space. Two enhancing masses could not migrate because of adhesion and showed peripheral neovascularization. We report an extremely rare case of multiple intradural lumbar disc herniations showing diverse enhancing patterns and masquerading as multiple IDEM tumors. In case of multiple enhancing IDEM masses suspected preoperatively, surgeons should consider the possibility of intradural disc herniation.
Lumbar Vertebrae ; Retrospective Studies

No abstract available.
Myelitis, Transverse* ; Retrospective Studies*