scholarly journals Percutaneous Endoscopic Lumbar Discectomy for L5-S1 Disc Herniation: Consideration of the Relation between the Iliac Crest and L5-S1 Disc

2016 ◽  
Vol 19 (2;2) ◽  
pp. E301-E308
Author(s):  
Kyung-Chul Choi

Background: Percutaneous transforaminal techniques for the treatment of lumbar disc herniation have markedly evolved. Percutaneous endoscopic lumbar discectomy (PELD) for L5-S1 disc herniation is regarded as challenging due to the unique anatomy of the iliac crest, large facet joint, and inclinatory disc space. Among these, the iliac crest is considered a major obstacle. There are no studies regarding the height of the iliac crest and their appropriate procedures in PELD. Objectives: This study discusses PELD for L5-S1 disc herniation and the appropriate approach according to the height of iliac crest. Study Design: Retrospective evaluation. Methods: 100 consecutive patients underwent PELD via the transforaminal route for L5-S1 disc herniation by a single surgeon. The study was divided into 2 groups: the foraminoplasty group requiring foraminal widening to access the herniated disc and the non-foraminoplasty group treated by conventional posterolateral access. Radiological parameters such as iliac height, the relative position of the iliac crest to the landmarks of the L5-S1 level, iliosacral angle and foraminal height, and disc location were considered. Clinical outcomes were assessed by the Visual Analogue Scale (VAS, 0 – 10) for back and leg pain, the Oswestry Disability Index (ODI, 0 – 100%), and the modified MacNab criteria. Results: The overall VAS scores for back and leg pain decreased from 6.0 to 2.3 and from 7.5 to 1.7. The mean ODI (%) improved from 54.0 to 11.6. Using modified MacNab criteria, a good outcome was 92%. Foraminoplasty was required in 19 patients. Iliac crest height was significantly higher in the foraminoplasty group than the non-foraminoplasty group (37.7 mm vs 30.1 mm, P < 0.001). In the foraminoplasty group, the iliac crest is above the mid L5 pedicle on lateral radiography in all cases. There were no significant differences in foraminal height, foraminal width, iliosacral angle, or disc height between the 2 groups. In addition, there were no differences in clinical outcome between the 2 groups. Limitations: This study is a retrospective analysis and simplifies the complexity of the L5-S1 level and iliac bone using two-dimensional radiography. Conclusion: In high iliac crest cases where the iliac crest is above the mid L5 pedicle in lateral radiography, foraminoplasty may be considered for transforaminal access of L5-S1 disc herniation. Conventional transforaminal access can be utilized with ease in low iliac crest cases where the iliac crest is below the mid-L5 pedicle. Key words: Percutaneous endoscopic lumbar discectomy, transforaminal, L5-S1, iliac crest, foraminoplasty

Author(s):  
Prakash U. Chavan ◽  
Mahendra Gudhe ◽  
Ashok Munde ◽  
Balaji Jadhav

<p class="abstract"><strong>Background:</strong> The objective of the study was to compare surgical outcome of micro-discectomy with transforaminal percutaneous endoscopic lumbar discectomy for single level lumbar disc herniation in Indian rural population.</p><p class="abstract"><strong>Methods:</strong> Retrospective comparative study was designed during the period of October 2012 to June 2015, patients in the age group of 22-75 years with unremitting sciatica with/without back pain, and/or a neurological deficit that correlated with appropriate level and side of neural compression as revealed on MRI, with single level lumbar disc herniation who underwent either microdiscectomy or TPELD were included in the study. Patients were assessed on visual analogue scale (VAS) for back and leg pain, modified macnabs criteria, the Oswestry Disability Index (ODI).<strong></strong></p><p class="abstract"><strong>Results:</strong> Group I (MD) included 44 patients and Group II (TPELD) included 20 patients. Significant improvement was seen in claudication symptom post-operatively in both MD and TPELD. Mean operating time was significantly shorter in MD group (1.11 hrs vs. 1.32 hrs; p&lt;0.01). According to modified MacNab's criteria,<strong> </strong>outcome were excellent (81.8%), good (9.09%) and fair<strong> </strong>(9.09%) in MD. Similarly, in TPELD, 80%, 15% and 5% patients had excellent, good and fair outcome respectively. In both groups, no one had a poor outcome. Thus, overall success rate was 100% in the study.</p><strong>Conclusions:</strong> TPELD and MD have comparable post-operative outcome in most of the efficacy parameters in Indian rural patients undergoing treatment of single level lumbar disc herniation. Additionally, TPELD offers distinct advantages such as performed under local anaesthesia, preservation of structure, lesser post-operative pain and early mobilization and discharge from hospital.


2016 ◽  
Vol 19 (2;2) ◽  
pp. E291-E300 ◽  
Author(s):  
Jin-Sung Kim

Background: Remarkable advancements in endoscopic spinal surgery have led to successful outcomes comparable to those of conventional open surgery. Large lumbar disc herniation (LLDH) is a serious condition, resulting in higher surgical failure when accessing the herniated disc. Objectives: This study compared the outcomes of LLDH treated with percutaneous endoscopic lumbar discectomy (PELD) and open lumbar microdiscectomy (OLM). Study Design: Retrospective assessment. Methods: This retrospective observational study was conducted from January 2011 to June 2012. Forty-four consecutive patients diagnosed with LLDH without cauda equina syndrome who were scheduled to undergo spinal surgery were included. LLDH was defined as herniated disc fragment occupying > 50% of the spinal canal. Clinical outcomes were evaluated using a visual analogue scale (VAS, 0 – 10), functional status was assessed using the Oswestry Disability Index (ODI, 0 – 100%) at 1, 6, and 24 months postoperatively and surgical satisfaction rate (0 – 100%) at final follow up. Radiological variables were assessed by plain radiography. Results: Forty-three patients were included; 20 and 23 patients underwent PELD and OLM, respectively. Both groups exhibited significant improvements in leg and back pain postoperatively (P < 0.001). Although there was no significant difference in leg pain improvement between the groups, improvement in back pain was significantly higher in the PELD group than in the OLM group (4.9 ± 1.5 vs. 2.5 ± 1.0, P < 0.001). The surgical satisfaction rate of the PELD group was significantly higher than that of the OLM group (91.3% ± 6.5 vs. 84.3% ± 5.2, P < 0.001). Mean operating time, hospital stay, and time until return to work were significantly shorter in the PELD group than in the OLM group (67.8 vs. 136.7 minutes, 1.5 vs. 7.2 days, and 4.2 vs. 8.6 weeks; P < 0.001). Disc height (%) decreased significantly from 23.7 ± 3.3 to 19.1 ± 3.7 after OLM (P < 0.001), but did not change significantly after PELD (23.6 ± 3.2 to 23.4 ± 4.2; P = 0.703). The segmental angle of the operated level increased from 10.3° to 15.4° in the PELD group, which was significantly higher than that in the OLM group (9.6° to 11.6°; P = 0.038). In the OLM group, there was one case of fusion due to instability. In the PELD group, one case required revision surgery and another case experienced recurrence. There were no perioperative complications in either group. Limitation: The study was retrospective with a small sample size and short follow-up period. Conclusion: PELD can be an effective treatment for LLDH, and it is associated with potential advantages, including a rapid recovery, improvements in back pain, and disc height preservation. Key words: Large lumbar disc herniation, percutaneous endoscopic lumbar discectomy, microdiscectomy, back pain, disc height


Author(s):  
Yu Xia ◽  
Qiongyue Zhang ◽  
Xiang Gao ◽  
Keran Wang ◽  
Xun Zhang ◽  
...  

Abstract Background Posterior percutaneous endoscopic lumbar discectomy (PELD) has become a preferred procedure for the treatment of simple lumbar disc herniation (LDH) but has rarely been reported for distant upward migration. The purpose of this research was to investigate the feasibility, safety, clinical efficacy and technical points of posterior PELD combined with the vertical anchoring technique (VAT) for the treatment of LDH with distant upward migration. Methods Thirteen patients with distant upward migrated LDH who underwent posterior PELD combined with the VAT from March 2016 to May 2018 were selected. Among these cases, the herniated disc was located at L3/4 in 2 patients, L4/5 in 9 patients and L5/S1 in 2 patients. The operative time, length of hospital stay and postoperative complications were recorded. The visual analogue score (VAS), Oswestry Disability Index (ODI), Japanese Orthopaedic Association (JOA) scores and modified MacNab criteria were used to assess surgical efficacy. Results All 13 patients underwent successful surgery. We compared the VAS, ODI and JOA scores before and after surgery. The differences were statistically significant (P < 0.05). According to the modified MacNab criteria, 10 patients were assessed as “excellent”, 2 patients were assessed as “good” and 1 patient was assessed as “fair” at the last follow-up. The rate of satisfactory outcomes was 92.3%. Conclusion Posterior PELD combined with the VAT is a safe and feasible procedure for the treatment of LDH with distant upward migration and represents a new approach for this type of surgery.


2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Manyoung Kim ◽  
Sol Lee ◽  
Hyeun-Sung Kim ◽  
Sangyoon Park ◽  
Sang-Yeup Shim ◽  
...  

Background. Among the surgical methods for lumbar disc herniation, open lumbar microdiscectomy is considered the gold standard. Recently, percutaneous endoscopic lumbar discectomy is also commonly performed for lumbar disc herniation for its various strong points. Objectives. The present study aims to examine whether percutaneous endoscopic lumbar discectomy and open lumbar microdiscectomy show better results as surgical treatments for lumbar disc herniation in the Korean population. Methods. In the present meta-analysis, papers on Korean patients who underwent open lumbar microdiscectomy and percutaneous endoscopic lumbar discectomy were searched, both of which are surgical methods to treat lumbar disc herniation. The papers from 1973, when percutaneous endoscopic lumbar discectomy was first introduced, to March 2018 were searched at the databases of MEDLINE, EMBASE, PubMed, and Cochrane Library. Results. Seven papers with 1254 patients were selected. A comparison study revealed that percutaneous endoscopic lumbar discectomy had significantly better results than open lumbar microdiscectomy in the visual analogue pain scale at the final follow-up (leg: mean difference [MD]=-0.35; 95% confidence interval [CI]=-0.61, -0.09; p=0.009; back: MD=-0.79; 95% confidence interval [CI]=-1.42, -0.17; p=0.01), Oswestry Disability Index (MD=-2.12; 95% CI=-4.25, 0.01; p=0.05), operation time (MD=-23.06; 95% CI=-32.42, -13.70; p<0.00001), and hospital stay (MD=-4.64; 95% CI=-6.37, -2.90; p<0.00001). There were no statistical differences in the MacNab classification (odds ratio [OR]=1.02; 95% CI=0.71, 1.49; p=0.90), complication rate (OR=0.72; 95% CI=0.20, 2.62; p=0.62), recurrence rate (OR=0.83; 95% CI=0.50, 1.38; p=0.47), and reoperation rate (OR=1.45; 95% CI=0.89, 2.35; p=0.13). Limitations. All 7 papers used for the meta-analysis were non-RCTs. Some differences (type of surgery (primary or revisional), treatment options before the operation, follow-up period, etc.) existed depending on the selected paper, and the sample size was small as well. Conclusion. While percutaneous endoscopic lumbar discectomy showed better results than open lumbar microdiscectomy in some items, open lumbar microdiscectomy still showed good clinical results, and it is therefore reckoned that a randomized controlled trial with a large sample size would be required in the future to compare these two surgical methods.


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