The modified transforaminal endoscopic technique in treating intracanalicular combining foraminal and/or extraforaminal lumbar disc herniations

Full-endoscopic lumbar discectomy via lateral superior articular process approach for treating far lateral lumbar disc herniation: a retrospective study and technical note

PURPOSE

This study aims to evaluate the efficacy and safety of the full-endoscopic lumbar discectomy (FELD) via lateral superior articular process (LSAP) approach and full-endoscopic transforaminal discectomy (FETD) for treating far lateral lumbar disk herniation (FFLDH).

METHODS

From January 2020 to June 2022, patients who were diagnosed as FLLDH underwent the FELD via LSAP approach or FETD. The operation time, estimated blood loss, length of hospital stays, and complications were recorded. The visual analog scale (VAS) for back pain, VAS for leg pain, and the Oswestry Disability Index (ODI) scores was measured during preoperative and postoperative follow-up.

RESULTS

Thirty-two patients were enrolled in this study, of which 12 patients were treated with the FELD via LSAP approach (LSAP-FELD group) and 20 patients underwent FETD (FETD group). The LSAP-FELD group exhibited significantly shorter operation times and hospital stays compared to the FETD group, while no statistically significant differences were observed in intraoperative blood loss and complication rates. There were no significant differences in the VAS for back pain, the VAS for leg pain, and the ODI score between the two groups preoperatively and three days, three months, and the last follow-up postoperatively.

CONCLUSIONS

Both the FELD via LSAP approach and FETD have demonstrated favourable clinical efficacy in the treatment of FLLDH. Notably, the FELD via LSAP approach shows the advantages of shorter operation time and hospital stays.

A Retrospective Comparative Study of Modified Percutaneous Endoscopic Transforaminal Discectomy and Open Lumbar Discectomy for Gluteal Pain Caused by Lumbar Disc Herniation

Introduction

This study aimed to demonstrate the safety and effectiveness of modified percutaneous endoscopic transforaminal discectomy (PETD) in the surgical management of single-segment lumbar disc herniation (LDH) gluteal pain and to determine whether it provides a better clinical outcome than open lumbar discectomy (OD).

Methods

A retrospective analysis of patients treated with modified PETD and OD for gluteal pain in LDH from January 2015 to December 2020 was conducted. Sample size was determined using a priori power analysis. Demographic information, surgical outcomes including procedure time (minutes), intraoperative blood loss (mL), hospital days, costs (RMB), fluoroscopy shots, recurrence and complications, etc., were recorded and analyzed. Prognostic outcomes were assessed using the visual analog scale (VAS), the Oswestry Disability Index (ODI), the Japanese Orthopedic Association Score (JOA) and modified MacNab criteria. The preoperative and postoperative VAS, ODI and JOA scores were recorded by two assistants. When the results were inconsistent, the scores were recorded again by the lead professor until all scores were consistently recorded in the data. MRI was used to assess radiological improvement and all patients received follow-ups for at least one year.

Results

The sample size required for the study was calculated by a priori analysis, and a total of 72 participants were required for the study to achieve 95% statistical test power. A total of 93 patients were included, 47 of whom underwent modified PETD, and 46 of whom underwent OD. In the modified PETD intragroup comparison, VAS scores ranged from 7.14 ± 0.89 preoperatively to 2.00 ± 0.58, 2.68 ± 0.70, 2.55 ± 0.69, 2.23 ± 0.81, and 1.85 ± 0.72 at 7 days, 1 month, 3 months, 6 months, and 12 months postoperatively. Patients showed significant pain relief postoperatively (P < 0.01). According to the modified MacNab score, the excellent rate in the PETD group was 89.36%. There was no significant difference compared to the OD group (89.13%, P > 0.05). Complication rates were lower (P > 0.05) but recurrence rates were higher (P > 0.05) in the modified PETD group than in the OD group. The modified PETD group had a faster operative time (P < 0.01), shorter hospital stay (P < 0.01), less intraoperative bleeding (P < 0.01), and less financial burden to the patient (P < 0.01) than the OD group. At 7 days postoperatively, the VAS score for low back pain was higher in the OD group than in the modified PETD group (P < 0.01). The VAS and JOA scores at 1, 3, 6, and 12 months postoperatively were not significantly different between the modified PETD and OD groups (P > 0.05), and the ODI was significantly different at 3 months postoperatively (P < 0.05).

Conclusion

Modified PETD treatment is safe and effective for gluteal pain due to L4/5 disc herniation and has the advantages of a lower complication rate, faster postoperative recovery, shorter length of stay, fewer anesthesia risks and lower cost of the procedure compared with OD. However, modified PETD has a higher recurrence rate.

Percutaneous transforaminal endoscopic discectomy for different types of lumbar disc herniation: A retrospective study

Objective

To introduce the concept of ‘nerve root as the core’ and to investigate the surgical procedure and curative effect of percutaneous translaminar endoscopic discectomy (PTED) surgery in the treatment of different types of lumbar disc herniation (LDH).

Methods

This retrospective study analysed the clinical data from patients with LDH that underwent single-segment PTED surgery. They were divided into three groups based on LDH location: central canal zone group, lateral recess zone group and foraminal/far lateral zone group. Different working cannula placement methods were used for the different types of LDH. All patients were followed for at least 12 months. Clinical and follow-up data were compared between the three groups.

Results

A total of 130 patients were enrolled in the study: 44 (33.8%) in the central canal zone group, 72 (55.4%) in the lateral recess zone group and 14 (10.8%) in the foraminal/far lateral zone group. All three groups of patients achieved good postoperative results. The improvements in leg pain and disability were most marked in the first postoperative month in all three groups.

Conclusion

PTED achieved adequate decompression for different types of LDH. The concept of ‘nerve root as the core’ facilitated the accurate placement of the working cannula.

Full-Endoscopic Foraminoplasty Using a Visualized Bone Reamer in the Treatment of Lumbar Disc Herniation: A Retrospective Study of 80 Cases

BACKGROUND

Percutaneous endoscopic lumbar discectomy (PELD) has been widely used, before which foraminoplasty is necessary to widen the foramen for subsequent procedures. However, the learning curve of this technology is high, as the use of traditional reamers requires repeated intraoperative fluoroscopy. We sought to compare the clinical outcomes by using the visualized and traditional reamers in PELD foraminoplasty for the treatment of lumbar disc herniation.

METHODS

Eighty patients with lumbar disc herniation who were treated with PELD between 1 January 2017 and 1 January 2019 were retrospectively reviewed. The patients were randomly divided into 2 groups (40 patients in the Visualized Bone Reamer group) and (40 patients in the Traditional Bone Reamer group). Intraoperative fluoroscopy time, cannulation introduction time, visual analog scale, and Macnab criteria score were compared between the 2 groups.

RESULTS

The mean follow-up durations were 17.41 ± 1.47 and 18.37 ± 1.69 months in the visualized and traditional groups, respectively. The average cannulation introduction time and intraoperative fluoroscopy times in the visualized group is significantly lower than those in traditional group (29.20 ± 3.31 vs. 39.85 ± 3.98 minutes, P < 0.001; and 12.30 ± 2.38 vs. 20.65 ±3.51 seconds, P < 0.001, respectively). One patient in the traditional group required reoperation, and no complications occurred in the visualized group. There were no severe durotomies or vascular or visceral injuries.

CONCLUSIONS

Full-endoscopic foraminoplasty using a visualized reamer is safe and effective and can decrease intraoperative fluoroscopy time in PELD.

Comparison of the application value of two commonly used minimally invasive spinal surgery in the treatment of lumbar disc herniation

The aim of the study was to compare the application value of percutaneous transforaminal endoscopic discectomy (PTED) and microendoscopic discectomy (MED) in the treatment of lumbar disc herniation (LDH). From January 2017 to July 2018, 108 LDH patients undergoing surgical treatment in our hospital were collected and divided into PTED group (treated with PTED, n=50) and MED group (treated with MED, n=58). The operation parameter index level, complications, recurrence and pain score (VAS), Oswestry disability index (ODI) and Japanese Orthopaedic Association Scale (JOA) were compared between the two groups. VAS, ODI and JOA scores of the two groups were significantly decreased after operation (P<0.05), but there was no significant difference between the two groups (P>0.05). Complications and recurrence of the two groups were similar (P>0.05). MED was superior to PTED in the number of intraoperative fluoroscopy and operation time, while PTED was superior to MED in intraoperative blood loss, incision length, length of hospital stay and bed rest time (P<0.05). Both PTED and MED can effectively treat LDH. Referring to clinical data, PTED may be the first choice for LDH treatment.