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Godolias P, Frieler S, Tataryn ZL, McBride P, Nunna R, Ghayoumi P, Charlot K, Tran A, Al-Awadi H, Gerstmeyer JR, Ruetten S, Chapman JR, Oskouian RJ. Towards a More Realistic Appraisal of Complications Following Staged Lateral Lumbar Interbody Fusion: A Single Institution Series. Global Spine J 2024; 14:130-137. [PMID: 35446693 PMCID: PMC10676158 DOI: 10.1177/21925682221096621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
STUDY DESIGN Retrospective cohort study. OBJECTIVES With steadily increasing implementation of far lateral approaches in spine surgery, surgeons can utilize the advantages of different approaches synergistically to ensure an optimal patient outcome. Our single institution study aimed to assess the complication rates of patients who underwent a lateral interbody fusion as the index procedure and additional anterior or posterior instrumentation as part of a planned staged surgical reconstruction effort. METHODS This study was approved by our institutional review board (STUDY2021000113). We included 576 patients who received a lateral lumbar interbody fusion (LLIF) as the index procedure followed by transforaminal lumbar interbody fusion (TLIF), posterior lumbar interbody fusion (PLIF) or anterior lumbar interbody fusion (ALIF) between 2016 and 2020. Primary outcomes were complications identified during the initial inpatient stay, which were categorized into approach-related and secondary complications. Secondary outcomes tracked up to 6 years post-surgery. RESULTS The overall complication rate was 19.2% (10.5% approach related, 8.7% secondary complications). Significant intraoperative hemorrhage (mean 659.3 mL vs 131.4 mL, P < .01) was the most common approach related complication with an incidence of 4%, followed by temporary hip flexor weakness in 2.6%. A permanent (femoral) nerve damage was verified in 1 patient. The most common secondary complication was impaired wound healing in 12 patients (2.1%). We identified a 7.1% (41 of 576 patients) rate of revision surgery, on average after 372 days (±34 days). CONCLUSIONS We recorded an overall complication rate of 19.2% for staged adult deformity corrective surgeries utilizing far lateral interbody fusions at several lumbar levels followed by a more comprehensive posterior surgical reconstruction.
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Affiliation(s)
- Periklis Godolias
- Seattle Science Foundation, Seattle, WA, USA
- Department of Orthopedics and Trauma Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bochum, Germany
| | - Sven Frieler
- Department of Orthopedics and Trauma Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bochum, Germany
| | | | | | - Ravi Nunna
- Seattle Science Foundation, Seattle, WA, USA
| | | | | | - Angela Tran
- Seattle Science Foundation, Seattle, WA, USA
| | | | - Julius R. Gerstmeyer
- Department of Orthopedics and Trauma Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bochum, Germany
| | - Sebastian Ruetten
- Center for Spine Surgery and Pain Therapy, Center for Orthopedics and Traumatology of the St. Elisabeth Group–Catholic Hospitals Rhein-Ruhr, St. Anna Hospital Herne/Marien Hospital Herne University Hospital/Marien Hospital Witten, Herne, Germany
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Fourman MS, Alluri RK, Sarmiento JM, Lyons KW, Lovecchio FC, Araghi K, Dalal SS, Shinn DJ, Song J, Shahi P, Melissaridou D, Carrino JA, Sheha ED, Iyer S, Dowdell JE, Qureshi SS. Female Sex and Supine Proximal Lumbar Lordosis Are Associated With the Size of the LLIF "Safe Zone" at L4-L5. Spine (Phila Pa 1976) 2023; 48:1606-1610. [PMID: 36730683 DOI: 10.1097/brs.0000000000004541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 09/09/2022] [Indexed: 02/04/2023]
Abstract
STUDY DESIGN Retrospective chart review. OBJECTIVE Identify demographic and sagittal alignment parameters that are independently associated with femoral nerve position at the L4-L5 disk space. SUMMARY OF BACKGROUND DATA Iatrogenic femoral nerve or lumbar plexus injury during lateral lumbar interbody fusion (LLIF) can result in neurological complications. The LLIF "safe zone" is the anterior half to two third of the disk space. However, femoral nerve position varies and is inconsistently identifiable on magnetic resonance imaging. The safe zone is also narrowest at L4-L5. METHODS An analysis of patients with symptomatic lumbar spine pathology and magnetic resonance imaging with a visibly identifiable femoral nerve evaluated at a single large academic spine center from January 1, 2017, to January 8, 2020, was performed. Exclusion criteria were transitional anatomy, severe hip osteoarthritis, coronal deformity with cobb >10 degrees, > grade 1 spondylolisthesis at L4-L5 and anterior migration of the psoas.Standing and supine lumbar lordosis (LL) and its proximal (L1-L4) and distal (L4-S1) components were measured. Femoral nerve position on sagittal imaging was then measured as a percentage of the L4 inferior endplate. A stepwise multivariate linear regression of sagittal alignment and LL parameters was then performed. Data are written as estimate, 95% CI. RESULTS Mean patient age was 58.2±14.7 years, 25 (34.2%) were female and 26 (35.6%) had a grade 1 spondylolisthesis. Mean femoral nerve position was 26.6±10.3% from the posterior border of L4. Female sex (-6.6, -11.1 to -2.1) and supine proximal lumbar lordosis (0.4, 0.1-0.7) were independently associated with femoral nerve position. CONCLUSIONS Patient sex and proximal LL can serve as early indicators of the size of the femoral nerve safe zone during a transpsoas LLIF approach at L4-L5.
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Affiliation(s)
- Mitchell S Fourman
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Ram K Alluri
- Department of Orthopaedic Surgery, University of Southern California, Los Angeles, CA
| | - J Manuel Sarmiento
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Keith W Lyons
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Francis C Lovecchio
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Kasra Araghi
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Sidhant S Dalal
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Daniel J Shinn
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Junho Song
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Pratyush Shahi
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Dimitra Melissaridou
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - John A Carrino
- Department of Radiology, Hospital for Special Surgery, New York, NY
| | - Evan D Sheha
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Sravisht Iyer
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - James E Dowdell
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
| | - Sheeraz S Qureshi
- Spine Service, Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY
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Lumbosacral plexus 3D printing with dissection validation - a baseline study with regards to lateral spine surgery. INTERDISCIPLINARY NEUROSURGERY 2023. [DOI: 10.1016/j.inat.2022.101666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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Huo Y, Ding W, Rudd S, Yang D, Ma L, Zhao R, Yang S. Incidence and risk factors of lumbar plexus injury in patients undergoing oblique lumbar interbody fusion surgery. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2023; 32:336-344. [PMID: 36370208 DOI: 10.1007/s00586-022-07439-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 09/25/2022] [Accepted: 10/27/2022] [Indexed: 11/13/2022]
Abstract
PURPOSE To investigate the incidence and risk factors of lumbar plexus injury (LPI) after oblique lumbar interbody fusion (OLIF) surgery. METHODS A total of 110 patients who underwent OLIF surgery between January 2017 and January 2021 were retrospectively reviewed. Patients were divided into two groups: the group with LPI (LPI group) and the group without LPI (non-LPI group). The baseline demographic data, surgical variables and radiographic parameters were compared and analyzed between these two groups. RESULTS Among all participants, 13 (8.5%) had LPI-related symptoms postoperatively (short-term), and 6 (5.5%) did not fully recover after one year (long-term). Statistically, there were no significant differences in the baseline demographic data, surgery duration, intraoperative blood loss, preoperative diagnosis, surgical procedures used and incision length. Compared with the non-LPI group, patients in the LPI group had a narrower OLIF channel space. In LPI group, the anterior edge of left psoas major muscle overpasses the anterior edge of surgical intervertebral disk (IVD) on axial MRI. Logistic regression analysis revealed that narrow OLIF channel space and the anterior edge of left psoas major muscle overpassing the anterior edge of surgical IVD on axial MRI were independently associated with both short-term and long-term LPI. CONCLUSION Narrow OLIF channel space and the anterior edge of left psoas major muscle overpassing the anterior edge of surgical IVD are significant risk factors of OLIF surgery-related LPI. Surgeons should use preoperative imaging to adequately assess these risk factors to reduce the occurrence of LPI.
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Affiliation(s)
- Yachong Huo
- Department of Spine Surgery, The Third Hospital of Hebei Medical University, 139Ziqiang Rd, Shijiazhuang, 050051, China
| | - Wenyuan Ding
- Department of Spine Surgery, The Third Hospital of Hebei Medical University, 139Ziqiang Rd, Shijiazhuang, 050051, China. .,Hebei Joint International Research Centre for Spinal Diseases, 139Ziqiang Rd, Shijiazhuang, 050051, China.
| | - Samuel Rudd
- School of Chemical Engineering, The University of Queensland, St Lucia 4067, Brisbane, Australia
| | - Dalong Yang
- Department of Spine Surgery, The Third Hospital of Hebei Medical University, 139Ziqiang Rd, Shijiazhuang, 050051, China
| | - Lei Ma
- Department of Spine Surgery, The Third Hospital of Hebei Medical University, 139Ziqiang Rd, Shijiazhuang, 050051, China
| | - Ruoyu Zhao
- Department of Spine Surgery, The Third Hospital of Hebei Medical University, 139Ziqiang Rd, Shijiazhuang, 050051, China
| | - Sidong Yang
- Department of Spine Surgery, The Third Hospital of Hebei Medical University, 139Ziqiang Rd, Shijiazhuang, 050051, China. .,Hebei Joint International Research Centre for Spinal Diseases, 139Ziqiang Rd, Shijiazhuang, 050051, China.
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Panico M, Bertoli M, Villa TMT, Galbusera F, Messori M, La Maida GA, Misaggi B, Gallazzi E. Does the anterior column realignment technique influences the stresses on posterior instrumentation in sagittal imbalance correction? A biomechanical, finite-element analysis of L5-S1 ALIF and L3-4 lateral ACR. Spine Deform 2023; 11:41-47. [PMID: 35999490 DOI: 10.1007/s43390-022-00567-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2022] [Accepted: 07/30/2022] [Indexed: 10/15/2022]
Abstract
STUDY DESIGN Biomechanical finite-element study. OBJECTIVE To directly compare the biomechanical effects of two different techniques for sagittal plane correction of adult spine deformity based on the anterior longitudinal ligament (ALL) resection and use of hyperlordotic cages, namely, the anterior column realignment (ACR) in L3-4, and ALIF in L5-S1 in terms of primary stability and rod stresses using finite-element models. METHODS A finite-element model of the thoracolumbar spine was used to perform the analysis. Starting from this "intact" model, three further models were constructed through the insertion of spinal instrumentation, i.e., pedicle screws, rods and cages: 1) posterior instrumentation between T9 and S1 (referred to as "T9-S1"); 2) posterior instrumentation T9-S1 + Hyperlordotic (26°) ALIF cage in L5-S1 ("ALIF"); 3) posterior instrumentation T9-S1 + Hyperlordotic (30°) ACR cage in L3-4 ("ACR"). These models were studied by simulations applying, alternately, a pure moment of 7.5 Nm between the three planes of motion (flexion, extension, lateral bending, and bilateral axial rotation), uniformly distributed over the upper surface of the T9 thoracic vertebra. A total of 24 simulations were performed (6 per models). RESULTS All models presented a significant reduced ROM when compared to the intact model; the ROM reduction was higher both at L3-4 in the ACR model and at L5-S1 in the ALIF model. At L3-4, the ACR model had, in all cases, the lowest maximum values of Von Mises stresses on the rods, especially in flexion-extension. At L4-5, the ALIF model had the lowest stresses during flexion-extension and axial rotation, while the ACR model had the lowest stresses during lateral bending. At L5-S1, the ALIF model had, in all cases, the lowest stresses on the rods. CONCLUSIONS This finite-element study showed how both ACR at L3-4 and ALIF-ACR at L5-S1 are effective in restoring lumbar lordosis (LL), stabilizing the spine and reducing stress on posterior rods at the index level when compared to a simple fixation model. Interestingly, ALIF-ACR reduces rod stress even at L4-5 in flexion-extension and axial rotation, possibly due to a better distribution of LL, especially on the lower arch, while ACR reduces the stress at L4-5 in lateral bending, possibly thanks to the larger footprint of the cage that increases the area of contact with the lateral side of the endplates.
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Affiliation(s)
- Matteo Panico
- IRCCS Istituto Ortopedico Galeazzi, Milano, Italy.,Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico Di Milano, Milano, Italy
| | - Marco Bertoli
- Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico Di Milano, Milano, Italy
| | - Tomaso Maria Tobia Villa
- IRCCS Istituto Ortopedico Galeazzi, Milano, Italy.,Department of Chemistry, Materials and Chemical Engineering "Giulio Natta", Politecnico Di Milano, Milano, Italy
| | | | | | | | - Bernardo Misaggi
- U.O.C. Patologia Vertebrale E Scoliosi, ASST Gaetano Pini-CTO, Milano, Italy
| | - Enrico Gallazzi
- U.O.C. Patologia Vertebrale E Scoliosi, ASST Gaetano Pini-CTO, Milano, Italy.
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Godolias P, Tataryn ZL, Frieler S, Nunna R, Charlot K, Tran A, Plümer J, Cibura C, Al-Awadi H, Daher Z, Dudda M, Schildhauer TA, Chapman J, Oskouian R. Complication rates following stand-alone lateral interbody fusion: a single institution series after 10 years of experience. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY & TRAUMATOLOGY : ORTHOPEDIE TRAUMATOLOGIE 2022:10.1007/s00590-022-03408-7. [PMID: 36239820 DOI: 10.1007/s00590-022-03408-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 09/28/2022] [Indexed: 06/16/2023]
Abstract
PURPOSE This retrospective single institution study's goal was to analyze and report the complications from stand-alone lateral lumbar interbody fusions (LLIF). METHODS This research was approved by the institutional review board (STUDY2021000113). We retrospectively reviewed the database of patients with adult degenerative spine deformity treated via LLIF at our institution between January 2016 and December 2020. RESULTS Stand-alone LLIF was performed in 158 patients (145 XLIF, 13 OLIF; mean age 65 y.; 88 f., 70 m.). Mean surgical time was 85 min (± 24 min). Mean follow-up was 14 months (± 5 m). Surgical blood loss averaged 120 mL (± 187 mL) and the mean number of fused levels was 1.2 (± 0.4 levels). Overall complication rate was 19.6% (31 total; 23 approach-related, 8 secondary complications). CONCLUSION Lateral interbody fusion appears to be a safe surgical intervention with relatively low complication- and revision rates.
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Affiliation(s)
- Periklis Godolias
- Department of Orthopedics and Trauma Surgery, St. Josef Hospital Essen-Werden, Propsteistrasse 2, 45239, Essen, Germany.
| | - Zachary L Tataryn
- Seattle Science Foundation, 550 17th Avenue, Suite 600, Seattle, WA, 98122, USA
| | - Sven Frieler
- Department of Orthopedics and Trauma Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany
| | - Ravi Nunna
- Seattle Science Foundation, 550 17th Avenue, Suite 600, Seattle, WA, 98122, USA
| | - Kaarina Charlot
- Seattle Science Foundation, 550 17th Avenue, Suite 600, Seattle, WA, 98122, USA
| | - Angela Tran
- Seattle Science Foundation, 550 17th Avenue, Suite 600, Seattle, WA, 98122, USA
| | - Jonathan Plümer
- Department of Orthopedics and Trauma Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany
| | - Charlotte Cibura
- Department of Orthopedics and Trauma Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany
| | - Hamzah Al-Awadi
- Seattle Science Foundation, 550 17th Avenue, Suite 600, Seattle, WA, 98122, USA
| | - Zeyad Daher
- Seattle Science Foundation, 550 17th Avenue, Suite 600, Seattle, WA, 98122, USA
| | - Marcel Dudda
- Department of Trauma, Hand, and Reconstructive Surgery, University Hospital Essen, Hufelandstrasse 55, 45147, Essen, Germany
| | - Thomas A Schildhauer
- Department of Orthopedics and Trauma Surgery, BG University Hospital Bergmannsheil, Ruhr University Bochum, Bürkle-de-la-Camp-Platz 1, 44789, Bochum, Germany
| | - Jens Chapman
- Seattle Science Foundation, 550 17th Avenue, Suite 600, Seattle, WA, 98122, USA
| | - Rod Oskouian
- Seattle Science Foundation, 550 17th Avenue, Suite 600, Seattle, WA, 98122, USA
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Morgan CD, Katsevman GA, Godzik J, Catapano JS, Hemphill C, Turner JD, Uribe JS. Outpatient outcomes of patients with femoral nerve neurapraxia after prone lateral lumbar interbody fusion at L4-5. J Neurosurg Spine 2022; 37:92-95. [PMID: 35120313 DOI: 10.3171/2021.11.spine211289] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 11/09/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Single-position prone lateral lumbar interbody fusion (LLIF) improves the efficiency of staged minimally invasive lumbar spine surgery. However, laterally approaching the lumbar spine, especially L4-5 with the patient in the prone position, could increase the risk of complications and presents unique challenges, including difficult ergonomics, psoas migration, and management of the nearby lumbar plexus. The authors sought to identify postoperative femoral neurapraxia after single-position prone LLIF at L4-5 to better understand how symptoms evolve over time. METHODS This retrospective analysis examined a prospectively maintained database of LLIF patients who were treated by two surgeons (J.S.U. and J.D.T.). Patients who underwent single-position prone LLIF at L4-5 and percutaneous pedicle screw fixation for lumbar stenosis or spondylolisthesis were included if they had at least 6 weeks of follow-up. Outpatient postoperative neurological symptoms were analyzed at 6-week, 3-month, and 6-month follow-up evaluations. RESULTS Twenty-nine patients (16 women [55%]; overall mean ± SD age 62 ± 11 years) met the inclusion criteria. Five patients (17%) experienced complications, including 1 (3%) who had a femoral nerve injury with resultant motor weakness. The mean ± SD transpsoas retractor time was 14.6 ± 6.1 minutes, the directional anterior electromyography (EMG) threshold before retractor placement was 20.1 ± 10.2 mA, and the directional posterior EMG threshold was 10.4 ± 9.1 mA. All patients had 6-week clinical follow-up evaluations. Ten patients (34%) reported thigh pain or weakness at their 6-week follow-up appointment, compared with 3/27 (11%) at 3 months and 1/20 (5%) at 6 months. No association was found between directional EMG threshold and neurapraxia, but longer transpsoas retractor time at L4-5 was significantly associated with femoral neurapraxia at 6-week follow-up (p = 0.02). The only case of femoral nerve injury with motor weakness developed in a patient with a retractor time that was nearly twice as long as the mean time (27.0 vs 14.6 minutes); however, this patient fully recovered by the 3-month follow-up evaluation. CONCLUSIONS To our knowledge, this is the largest study with the longest follow-up duration to date after single-position prone LLIF at L4-5 with percutaneous pedicle screw fixation. Although 34% of patients reported ipsilateral sensory symptoms in the thigh at the 6-week follow-up evaluation, only 1 patient sustained a nerve injury; this resulted in temporary weakness that resolved by the 3-month follow-up evaluation. Thus, longer transpsoas retractor time at L4-5 during prone LLIF is associated with increased ipsilateral thigh symptoms at 6-week follow-up that may resolve over time.
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Hiyama A, Katoh H, Nomura S, Sakai D, Sato M, Watanabe M. Radiographs assessment of changes in the psoas muscle at L4-L5 level after single-level lateral lumbar interbody fusion in patients with postoperative motor weakness. J Clin Neurosci 2021; 90:165-170. [PMID: 34275544 DOI: 10.1016/j.jocn.2021.05.057] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 05/17/2021] [Accepted: 05/27/2021] [Indexed: 12/01/2022]
Abstract
The purposes of this study were (1) to investigate postoperative changes in cross-sectional area (CSA) and signal intensity (SI) of the psoas muscle (PS) using magnetic resonance imaging (MRI) and (2) to compare the CSA and SI of the PS between patients with and without motor weakness after single-level lateral lumbar interbody fusion (LLIF) at level L4-L5. Sixty patients were divided into two groups-those with postoperative motor weakness and those without-and the two groups were compared. Baseline demographics and clinical characteristics, such as operation time and blood loss, length of hospital stay, and postoperative complications, were recorded. The CSA and SI of the PS were obtained from the MRI regions of interest defined by manual tracing. Patients who developed motor weakness after surgery were significantly older (p = 0.040). The operation time (p = 0.868), LLIF operative time (p = 0.476), and estimated bleeding loss (p = 0.168) did not differ significantly between groups. In both groups, the CSA and SI of the left and right PS increased after surgery. The change in the CSA of the left PS was significantly higher in patients with weakness (247.6 ± 155.2 mm2) than without weakness (152.2 ± 133.1 mm2) (p = 0.036). The change in SI of the left PS did not differ between the two groups (p = 0.530). To prevent postoperative motor weakness regardless of the operation time, surgeons should be aware of the potential for surgical invasive of the PS during LLIF in older people.
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Affiliation(s)
- Akihiko Hiyama
- Department of Orthopaedic Surgery, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan.
| | - Hiroyuki Katoh
- Department of Orthopaedic Surgery, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan.
| | - Satoshi Nomura
- Department of Orthopaedic Surgery, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan.
| | - Daisuke Sakai
- Department of Orthopaedic Surgery, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan.
| | - Masato Sato
- Department of Orthopaedic Surgery, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan.
| | - Masahiko Watanabe
- Department of Orthopaedic Surgery, Tokai University School of Medicine, 143 Shimokasuya, Isehara, Kanagawa 259-1193, Japan.
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