Epidemiological Features of Patients with Subdural Hygroma in a Prospective Case Series

Purpose To compare the efficacy and safety of the percutaneous screw fixation (PSF) and the open pedicle screw fixation (OPSF) on thoracolumbar (TL) fracture. Methods Sixty-four adult patients with TL vertebral fractures who underwent open or percutaneous posterior short-segment transpedicular screw fixation between January of 2013 and September of 2015 were retrospectively reviewed. All patients underwent clinical, radiological and quality of life follow-up for at least 18 months. Results There was no significant difference in age, gender, time between injury and surgery, and preoperative percentage of anterior column height, preoperative sagittal regional Cobb angle, or kyphotic angle of fractured vertebra between these two groups (p > 0.05). There was significantly less intraoperative blood loss in the PSF (87.6 24.6 mL) than in the OPSF group (271.4 142.6 mL) (p < 0.05). The mean surgery time was 62 minutes (range 42­130 minutes) for open and 58 minutes (range 35 to 128 minutes) for percutaneous screw fixation. The surgery time was shorter in the PSF group, but with no statistical significance (p > 0.05). The mean Oswestry disability index (ODI) scores after 18-months were 23.12 8.2 for the PSF and 24.12 9.2 for the OPSF group, without any statistical significance (p > 0.05). Conclusion Both open and percutaneous screw fixations are safe and effective. The percutaneous techniques significantly reduced the intraoperative blood loss compared with the open techniques.

Objetivo Comparar a eficácia e segurança das técnicas de fixação convencional e percutânea para fraturas toracolombares. Métodos Sessenta e quatro pacientes adultos com fraturas da transição toracolombar que foram submetidos a fixação pedicular curta por técnicas aberta convencional e percutânea entre janeiro de 2013 e setembro de 2015 foram retrospectivamente avaliados. Todos foram submetidos a avaliação clínica, radiológica e de qualidade de vida com no mínimo 18 meses do seguimento. Resultados Não houve diferença significativa na idade, sexo, tempo entre o trauma e o tratamento, porcentagem da redução da altura do corpo vertebral pré-operatório, angulo de Cob sagital na região da fratura, ou ângulo de de cifose da vértebra fraturada entre os dois grupos (p > 0,05). Houve uma menor perda sanguínea no grupo percutâneo (87,6 24,6 mL) em comparação com a técnica convencional (271,4 142,6 mL) (p < 0,05). O tempo médio da cirurgia foi 62 minutos (42 - 130 minutos) para a técnica convencional e 58 minutos (35 - 128 minutos) para a percutânea. Apesar de mais curto na técnica percutânea, não houve diferença estatisticamente significante no tempo cirúrgico entre os dois grupos (p > 0,05). Em relação ao índice de incapacidade de Oswestry após 18 meses do tratamento cirúrgico, também não houve diferença significante do ponto de vista estatístico entre os dois grupos, sendo 23,12 8,2 para a técnica percutânea e 24,12 9,2 para o grupo da técnica convencional (p > 0,05). Conclusão Ambas as técnicas mostraram-se eficazes e seguras para o tratamento de fraturas da transição toracolombar. A técnica percutânea apresentou uma taxa de perda sanguínea significativamente menor em comparação à técnica aberta convencional.

Open vs. Percutaneous Pedicle Screw Insertion for Thoracolumbar Traumatic A3 and A4 AO Fractures - 18-Months Follow-Up

Purpose To compare the efficacy and safety of the percutaneous screw fixation (PSF) and the open pedicle screw fixation (OPSF) on thoracolumbar (TL) fracture. Methods Sixty-four adult patients with TL vertebral fractures who underwent open or percutaneous posterior short-segment transpedicular screw fixation between January of 2013 and September of 2015 were retrospectively reviewed. All patients underwent clinical, radiological and quality of life follow-up for at least 18 months. Results There was no significant difference in age, gender, time between injury and surgery, and preoperative percentage of anterior column height, preoperative sagittal regional Cobb angle, or kyphotic angle of fractured vertebra between these two groups (p > 0.05). There was significantly less intraoperative blood loss in the PSF (87.6 24.6 mL) than in the OPSF group (271.4 142.6 mL) (p < 0.05). The mean surgery time was 62 minutes (range 42­130 minutes) for open and 58 minutes (range 35 to 128 minutes) for percutaneous screw fixation. The surgery time was shorter in the PSF group, but with no statistical significance (p > 0.05). The mean Oswestry disability index (ODI) scores after 18-months were 23.12 8.2 for the PSF and 24.12 9.2 for the OPSF group, without any statistical significance (p > 0.05). Conclusion Both open and percutaneous screw fixations are safe and effective. The percutaneous techniques significantly reduced the intraoperative blood loss compared with the open techniques.

Objetivo Comparar a eficácia e segurança das técnicas de fixação convencional e percutânea para fraturas toracolombares. Métodos Sessenta e quatro pacientes adultos com fraturas da transição toracolombar que foram submetidos a fixação pedicular curta por técnicas aberta convencional e percutânea entre janeiro de 2013 e setembro de 2015 foram retrospectivamente avaliados. Todos foram submetidos a avaliação clínica, radiológica e de qualidade de vida com no mínimo 18 meses do seguimento. Resultados Não houve diferença significativa na idade, sexo, tempo entre o trauma e o tratamento, porcentagem da redução da altura do corpo vertebral pré-operatório, angulo de Cob sagital na região da fratura, ou ângulo de de cifose da vértebra fraturada entre os dois grupos (p > 0,05). Houve uma menor perda sanguínea no grupo percutâneo (87,6 24,6 mL) em comparação com a técnica convencional (271,4 142,6 mL) (p < 0,05). O tempo médio da cirurgia foi 62 minutos (42 - 130 minutos) para a técnica convencional e 58 minutos (35 - 128 minutos) para a percutânea. Apesar de mais curto na técnica percutânea, não houve diferença estatisticamente significante no tempo cirúrgico entre os dois grupos (p > 0,05). Em relação ao índice de incapacidade de Oswestry após 18 meses do tratamento cirúrgico, também não houve diferença significante do ponto de vista estatístico entre os dois grupos, sendo 23,12 8,2 para a técnica percutânea e 24,12 9,2 para o grupo da técnica convencional (p > 0,05). Conclusão Ambas as técnicas mostraram-se eficazes e seguras para o tratamento de fraturas da transição toracolombar. A técnica percutânea apresentou uma taxa de perda sanguínea significativamente menor em comparação à técnica aberta convencional.

Paraspinal Muscle Sparing Versus Percutaneous Screw Fixation: A Comparative Enzyme Study of Tissue Injury during the Treatment of L4-L5 Spondylolisthesis

OBJECTIVE: Screw fixation via the paraspinal muscle sparing approach and by percutaneous screw fixation are known to diminish the risk of complications, such as, iatrogenic muscle injury as compared with the conventional midline approach. The purpose of this study was to evaluate tissue injury markers after these less traumatic screw fixation techniques for the treatment of L4-L5 spondylolisthesis. METHODS: Twenty-two patients scheduled for posterior lumbar interbody fusion (PLIF) at the L4-L5 segment for spondylolisthesis were prospectively studied. Patients were divided into two groups by screw fixation technique (Group I: paraspinal muscle sparing approach and Group II: percutaneous screw fixation). Levels of serum enzymes representing muscle injury (CK-MM and Troponin C type 2 fast), pro-inflammatory cytokine (IL-8), and anti-inflammatory cytokine (IL-1ra) were analyzed using ELISA techniques on the day of the surgery and 1, 3, and 7 days after the surgery. RESULTS: Serum CK-MM, Troponic C type 2 fast (TNNC2), and IL-1ra levels were significantly elevated in Group I on postoperative day 1 and 3, and returned to preoperative levels on postoperative day 7. No significant intergroup difference was found between IL-8 levels despite higher concentrations in Group I on postoperative day 1 and 3. CONCLUSION: This study shows that percutaneous screw fixation procedure is the preferable minimally invasive technique in terms of minimizing muscle injury associated with L4-L5 spondylolisthesis.

Paraspinal Muscle Sparing versus Percutaneous Screw Fixation : A Prospective and Comparative Study for the Treatment of L5-S1 Spondylolisthesis

OBJECTIVE: Both the paraspinal muscle sparing approach and percutaneous screw fixation are less traumatic procedures in comparison with the conventional midline approach. These techniques have been used with the goal of reducing muscle injury. The purpose of this study was to evaluate and to compare the safety and efficacy of the paraspinal muscle sparing technique and percutaneous screw fixation for the treatment of L5-S1 spondylolisthesis. METHODS: Twenty patients who had undergone posterior lumbar interbody fusion (PLIF) at the L5-S1 segment for spondylolisthesis were prospectively studied. They were divided into two groups by screw fixation technique (Group I : paraspinal muscle sparing approach and Group II: percutaneous screw fixation). Clinical outcomes were assessed by Low Back Outcome Score (LBOS) and Visual Analogue Scale (VAS) for back and leg pain at different times after surgery. In addition, modified MacNab's grading criteria were used to assess subjective patients' outcomes 6 months after surgery. Postoperative midline surgical scarring, intraoperative blood loss, mean operation time, and procedure-related complications were analyzed. RESULTS: Excellent or good results were observed in all patients in both groups 6 months after surgery. Patients in both groups showed marked improvement in terms of LBOSs all over time intervals. Postoperative midline surgical scarring and intraoperative blood loss were lower in Group II compared to Group I although these differences were not statistically significant. Low back pain (LBP) and leg pain in both groups also showed significant improvement when compared to preoperative scores. However, at 7 days and 1 month after surgery, patients in Group II had significantly better LBP scores compared to Group I. CONCLUSION: In terms of LBP during the early postoperative period, patients who underwent percutaneous screw fixation showed better results compared to ones who underwent screw fixation via the paraspinal muscle sparing approach. Our results indicate that the percutaneous screw fixation procedure is the preferable minimally invasive technique for reducing LBP associated with L5-S1 spondylolisthesis.

Minimally-invasive Percutaneous Screw Fixation of Displaced Intra-articular Calcaneal Fractures / 대한족부족관절학회지

PURPOSE: The purpose of this study is to analyze the clinical and radiological results of minimally invasive percutaneous screw fixation in intra-articular calcaneal fractures and its complications. MATERIALS AND METHODS: This study is based on 30 intra-articular calcaneal fractures that treated by index operation from June 2005 to November 2006 with at least 6 months follow-up. We assessed the clinical and radiological outcomes and complications. RESULTS: According to Sanders classification, there were 8 in type IIA, 7 in type IIB, 3 in type IIIAB, 6 in type IIIBC, 6 in type IV. And according to Essex-Lopresti classification, there were 9 in the tongue type, 21 in the joint depression type. Average follow-up period was 14.6 months (range: 6-23 months). Average interval between from injury to operation was 2.3 days. Average AOFAS score was 87.7 (range: 52-92). Satisfactory results were obtained in 22 cases (73.3%) by AOFAS score and in 20 cases (66.7%) by VAS score (mean: 3.4). Radiological results improved from 8.7 to 20.3 degrees in the Bohler angle and from 40.2 mm to 52.1 mm in calcaneal height. Postoperative complications were 2 skin and soft tissue problems and 1 sural neuropathy. CONCLUSION: Minimally invasive percutaneous screw fixation may be useful alternative surgical method in the management of Sanders type II and III calcaneal fractures, which is possible to achieves the anatomical restoration and minimizes postoperative complication in patients with high risks of soft tissue compromise and allows relatively early operation.

Modified Volar Percutaneous Screw Fixation for the Scaphoid Fractures: Trans-trapezial Approach

PURPOSE: The purpose of this study is to evaluate the clinical results of modified volar percutaneous fixation, in which a screw is introduced through the trapezium (trans-trapezial approach) for the treatment of undisplaced scaphoid fractures and nonunions. MATERIALS AND METHODS: We performed modified volar percutaneous screw fixation in 15 patients between December 2008 and October 2009. There were ten men and five women. The mean age was 45 years (range, 20-59 years). Seven patients had a isolated scaphoid fracture, four had a concomitant distal radius fracture, two had multiple fractures besides scaphoid fracture, one had a trans-scaphoid perilunar fracture-dislocation and one had a cystic nonunion of the scaphoid. The mean follow-up time was 13 months. A standard Acutrak headless screw (Acumed(R)) was used in all cases. RESULTS: At the final follow-up, the average arc of wrist motion was 60degrees of flexion and 65degrees of extension. The average grip power of the affected hand reached 90% compared with the unaffected side. The clinical results assessed by the modified Mayo wrist score showed twelve excellent and three good results. Plain radiographs showed accurate central placement of the screw without degenerative change in the scaphotrapezial joint in all patients. The mean time to union was 7.8 weeks. CONCLUSION: We believe that the modified volar percutaneous screw fixation is reliable method. However, long term follow-up is required to determine whether this approach would increase the risk of scaphotrapezial joint osteoarthritis.

Results after Operative Treatment for Maisonneuve Fracture / 대한족부족관절학회지

PURPOSE: This study is to analysis the outcome of patient with surgically treated Maisonneuve fracture and find out the factors that might influence the outcome. MATERIAL AND METHODS: 20 patients who had surgical treatment due to Maisonneuve fracture between February, 2001 to March, 2005 were studied. The patients were followed for at least 1 year and average follow up period was 25 months. The average age was 41 years, 16 were male and 4 were female. Mechanism of injury according to Rouge- Hansen classification was supination-external rotation. In all cases, percutaneous screw fixation was applied proximal to tibiofibular syndesmosis. The screws were removed after 8 weeks under local anesthesis. Clinical, functional and radiographic results were evaluated. RESULTS: 17 cases (85%) showed satisfying clinical and radiographic results. The mean functional score according to Ankle Scoring System was 91 (83 to 95). Complication occurred in 1 case with underlying systemic disease and 2 cases with initial ankle joint dislocation. CONCLUSION: Surgical treatment of Maisonneuve fracture showed relatively satisfying result. However, initial injury state and accompanying disease seem to have great effect on the result.

Clinical Results after Closed Reduction and Internal Fixation for Unstable Subtle Injuries of Lisfranc Joint / 대한족부족관절학회지

PURPOSE: The purpose of this study was to evaluate retrospectively the clinical results of closed reduction and percutaneous screw fixation for unstable injuries on stress radiographs in subtle injuries of Lisfranc joint. MATERIALS AND METHODS: From June 1997 to March 2003, 6 cases of unstable injuries on stress radiograph in subtle injuries of Lisfranc joint were treated by percutaneous cannulated screw fixation after closed reduction. All cases were injuried by indirect force (twisting injury). The average diastasis between the 1st and 2nd metatarsal base was 3 mm (2-4 mm) on initial nonweight bearing AP radiograph. The average follow-up period was 20 months. Clinical evaluation was assessed according to the American Orthopedic Foot and Ankle Society (AOFAS) midfoot score. RESULTS: The AOFAS midfoot score was average 86 (80-90) points. The average diastasis between 1st and 2nd metatarsal base was 2 mm (1-3 mm) on weight bearing AP radiograph in final follow up. The final diastasis was increased slightly than diastasis in initial postoperative radiographs. But the clinical results were good. There was no correlation between the degree of diastasis and the clinical results. On weight bearing lateral radiograph, the average difference with normal foot in the distance between plantar aspect of 5th metatarsus and medial cuneiform was 2 mm (0-3 mm). One case had mild arthritic change on the radiographs CONCLUSION: When the Lisfranc injuries, especially in the subtle injuries were suspicious, the stress views are helpful to assess stability of the Lisfranc injuries and planning of treatment. For unstable injuries on stress radiographs in subtle injuries of Lisfranc joint, closed reduction and percutaneous screw fixation is useful method to expect good clinical results.