Dual Plate Fixation for Displaced Transverse Fracture of the Lower Sacrum / 대한정형외과학회잡지

Isolated fractures of lower sacrum are commonly treated conservatively in most cases because of low energy damage and stable fracture. However, surgical treatment is required in displaced unstable fracture. But the surgical technique is not established and even case reports are not common. We reported a case of displaced transverse fracture of the lower sacrum that was treated with an open reduction and dual plate fixation.

Ultrasonographic Assessment of the Pronator Quadratus Muscle after Surgical Treatment for Distal Radius Fractures

PURPOSE: This study was to assess the morphological changes of the pronator quadratus (PQ) muscle using an ultrasonography in the volar locking plate fixation group and in the percutaneous K-wire fixation group for distal radius fracture, and to evaluate the impact on clinical outcomes. MATERIALS AND METHODS: Fifty-four patients who received surgical treatment for distal radius fracture were enrolled in this study. They were divided into two groups according to treatment modality: Group 1 included 34 patients who underwent internal fixation with volar locking plate and Group 2 included 20 patients with percutaneous K-wire fixation. Thickness of the PQ muscle was measured using an ultrasonography at the final follow-up. We evaluated the outcomes using the Mayo wrist score, wrist range of motion, and grip strength at the final follow-up. RESULTS: Compared with the uninjured side, thickness of the PQ muscle showed 31.9% of mean atrophy in Group 1 and 11.4% in Group 2. The atrophy of PQ muscle was severe in Group 1 (p=0.01). However, there was no significant difference in the mean Mayo wrist score between the two groups (83.1±10.9 in Group 1 and 80.2±8.9 in Group 2, p=0.28), except a mild limitation of pronation in Group 1. CONCLUSION: The healed PQ muscle from fracture itself after distal radius fracture revealed a morphological atrophy. Moreover, the volar locking plate resulted in greater atrophy of the PQ muscle, but there was no specific impact on clinical outcomes.

Prediction of midline depth from skin to cervical epidural space by lateral cervical spine X-ray

BACKGROUND: Previous studies have shown that measuring the distance from the skin to the ligamentum flavum by ultrasound preceding cervical epidural block can be beneficial in excluding false loss of resistance. However, the measurement value using ultrasound may vary depending on the degree of operator experience. Therefore, we aimed to determine the depth from skin to cervical epidural space by using lateral cervical spine X-ray, which is a more intuitive method. METHODS: We enrolled 102 adult patients who were scheduled to undergo cervical epidural anesthesia for vascular bypass surgery of upper arm. After attaching a steel rod on the needle insertion site, lateral cervical spine X-ray was taken before the epidural procedure. We measured the distance from the steel rod to the midpoint of interlaminar space on the spinolaminar line. The X-ray depth was compared with needle depth. RESULTS: Of the 102 enrolled patients, 18 patients including 13 in whom we were unable to measure X-ray depth were excluded from the analysis. In total, 84 patients were included in the analysis. Concordance correlation coefficient between the X-ray-measured depth and needle depth was 0.925. Bland-Altman analysis indicated a mean difference of ± 1.96 SD with 0.06 ± 0.56 cm. CONCLUSIONS: Lateral cervical spine X-ray can be useful for prediction of the midline depth from skin to epidural space, particularly for operators who are not skilled at spine ultrasound or the use the C-arm fluoroscopy.

Effects of Thoracic Epidural Anesthesia on Hemodynamic Changes Induced by Hypercapnia during Sevoflurane Anesthesia

OBJECTIVE: Many studies have demonstrated that carbon dioxide has direct depressive effects on the myocardium and dilates the vascular bed. However, it leads to an increase in arterial blood pressure and cardiac output because of sympathetic stimulating effect. Extensive epidural block may impair the sympathetic innervation to the heart as well as to the adrenal gland. The present study was set up in order to investigate how an extensive epidural block would affect the hemodynamic response to sympathetic stimulation induced by hypercapnia. METHODS: Twenty patients were mechanically ventilated under general anesthesia after epidural catheter insertion on T6–T7 intervertebral space. Hypercapnia was obtained by CO2 breathing. PaCO2 (partial pressure of CO2, arterial) was adjusted to 30, 45, and 60 mm Hg with each concentration being maintained for 10 minutes. In each period, hemodynamic variables were monitored by pulmonary artery catheter. After returning to normocarbia for 15 minutes, 20 mL of 0.375% ropivacaine was injected epidurally and PaCO2 was adjusted in the same manner, and then, the hemodynamic variables of each period were checked. RESULTS: There were no changes in mean arterial pressure and heart rate by hypercapnia after combined epidural anesthesia compared with general anesthesia only. Hypercapnia increased cardiac output and cardiac index. Systemic vascular resistance was decreased significantly. Pulmonary artery pressure was increased but not significantly. The degrees of hemodynamic changes were similar between in general anesthesia alone and in combined epidural anesthesia. CONCLUSION: In spite of an extensive epidural block, hemodynamic changes induced by hypercarbnia were not changed. There are some ‘escaped’ sympathetic nerve fibers.

Indirect Repair with Surgicel® and Fibrin Glue for Postoperative Cerebrospinal Fluid Leakage after Cervical Anterior Foraminotomy: A Case Report

STUDY DESIGN: A case report. OBJECTIVES: To report a case of indirect repair of cerebrospinal fluid (CSF) leakage after cervical anterior foraminotomy using Surgicel® and fibrin glue. SUMMARY OF LITERATURE REVIEW: There is no single modality that is best practice for this type of case because it is difficult to apply primary repair for a case of CSF leakage after cervical anterior decompression. MATERIALS AND METHODS: A 49-year-old female patient was diagnosed with CSF leakage on the second day after cervical anterior foraminotomy. We performed coverage with Surgicel® and fibrin glue at the CSF leak site. RESULTS: The patient was treated with indirect repair of CSF leakage without any complications. The clinical and radiological outcomes were excellent upon follow-up 1 year postoperatively. CONCLUSIONS: Indirect repair using Surgicel® and fibrin glue is an effective treatment for postoperative CSF leakage after cervical anterior foraminotomy.

Effectiveness of Doppler Image of the Vertebral Artery as an Anatomical Landmark for Identification of Ultrasound-Guided Target Level in Cervical Spine

STUDY DESIGN: A prospective sonographic study. PURPOSE: To verify the effectiveness of simultaneous application of two landmarks, Doppler image of the vertebral artery and shape of the transverse tubercle of the seventh cervical (C7) vertebra. OVERVIEW OF LITERATURE: Counting upwards from the C7 vertebra which only has a posterior tubercle of the transverse process is a commonly used method for ultrasound-guided cervical nerve root block. However, each transverse process has a different shape. METHODS: Sonograms of 20 volunteers were examined. At first, we identified the C7 transverse process based on the presence of the vertebral artery without the anterior tubercle. The C5 and C6 transverse processes were identified based on the presence of anterior tubercle without the vertebral artery. Subsequently, we placed needles on the C5, C6, and C7 transverse processes and the location and direction of needles were confirmed by fluoroscopy. RESULTS: In the 120 segments, 93.3% of needles were placed correctly as desired; 97.5% of needles were placed on the 5C transverse process; 97.5% of needles were placed on the C6 transverse process; and 85.0% of needles were placed on the C7 transverse process, respectively. Both sides showed the same accuracy of 93.3%. CONCLUSIONS: Simultaneous application of Doppler image of the vertebral artery and shape of the C7 transverse tubercle showed 93.3% accuracy in identifying the target cervical level. Therefore, Doppler image of the vertebral artery can be considered to be a useful landmark for ultrasound-guided cervical nerve root block.

What Is the Effect of Spino-Pelvic Sagittal Parameters and Back Muscles on Osteoporotic Vertebral Fracture?

STUDY DESIGN: Case control study. PURPOSE: To examine the effect of spino-pelvic sagittal parameters and back muscles on osteoporotic vertebral fracture. OVERVIEW OF LITERATURE: Low bone mass is not the only important component of the risk on osteoporotic vertebral fracture; many other risk factors also contribute to skeletal fragility. METHODS: Seventy-two patients who had a lateral radiograph of the whole spine, magnetic resonance imaging of the lumbar spine, and bone densitometry, were enrolled. The spino-pelvic sagittal parameters (pelvic incidence, pelvic tilt [PT], sacral slope, thoracic kyphosis, lumbar lordosis), age, lumbar bone mineral density, and amount of back muscle around the lumbar spine were analyzed. RESULTS: There was higher sagittal imbalance of the spine in the vertebral fracture group (p=0.011). In spinopelvic parameters, the average of PT was 22.13degrees in vertebral fracture group and 13.70degrees in the non-fracture group (p=0.002). The amount of lower back extensor muscle in the vertebral fracture group was 2,170 mm2, which was lower than the non-fracture group (3,040 mm2, p=0.001). Multiple logistic regression analysis for the risk of osteoporotic vertebral fracture was significant in lumbar bone mineral density (odds ratio [OR], 0.313; 95% confidence interval [CI], 0.139-0.706, p=0.005) and the muscle ratio of extensor back muscle (OR, 0.902; 95% CI, 0.826-0.984; p=0.020). CONCLUSIONS: These results suggest that osteoporotic vertebral fracture could be developed easily by weakness of extensor back muscle in sagittal imbalance of the spine with high pelvic tilt.

Treatment of the Femoral Fracture Using Sirus(R) Nail: A Comparison of Complication according to the Entry Potal

PURPOSE: The purpose of this study is to analyze the clinical results of fixation using Sirus(R) nail in patients with femoral subtrochanteric and shaft fracture and the difference in the frequency of complications according to the entry portal. MATERIALS AND METHODS: From July 2006 to August 2013, at least 1-year clinical follow-up, we retrospectively analyzed 36 cases with femoral subtrochanteric (15 cases) and shaft fracture (21 cases) who underwent surgery using Sirus(R) nail. We reviewed the records of operation time, intra-operative amounts of bleeding and complications. At last follow-up, we reviewed clinical results by Ray-Sanders criteria and analyzed the periods of bone union on the radiograph. We also measured changing of the femoral neck-shaft angle in the subtrochanteric fractures and angulation in the shaft fractures, respectively. Considering anatomical variation of the trochanter and fracture position of subtrochanteric and femoral shaft, entry points were divided into subgroups, and the clinical results were compared. RESULTS: The mean Ray-Sanders score was 27.4, 27 cases (75.0%) were good or excellent. The mean periods of bone union was 21.1 weeks in 31 cases. The mean neck-shaft angles were 135.7o preoperatively, 130.2o postoperatively. The mean angulation of the femur was 24.4o preoperatively, 2.4o postoperatively in patients of femoral shaft fractures. Despite no statistical significance, greater trochanter tip entry point and lateral entry point had a higher rate of frequency than medial entry point, with respect to the occurrence of iatrogenic fracture and malalignment. CONCLUSION: Using Sirus(R) nail for femoral subtrochanteric and shaft fractures showed good clinical and radiographic results and a high rate of union. Medial entry point yielded slightly better results in the occurrence of iatrogenic fracture and malalignment, compared to greater trochanter tip entry point and lateral entry point.

How Many High Risk Korean Patients with Osteopenia Could Overlook Treatment Eligibility?

STUDY DESIGN: Retrospective study. PURPOSE: To determine the prevalence of high risk patient with osteopenia requiring pharmacologic treatment and investigate the difference of 10-year fracture probability whether bone mineral density (BMD) include or not in Korean FRAX model. OVERVIEW OF LITERATURE: Many people with the fracture have osteopenia rather than osteoporosis, and BMD alone could be considered as a chance to prevent fracture. METHODS: Three hundred sixty-nine patients who was diagnosed as osteopenia were divided into two groups according to age (group 1, under 65 years; group 2, over 65 years), and 10-year fracture probabilities were calculated by FRAX algorithm with and without femur neck T-score. RESULTS: The high risk patients of the fracture who had above 3% of 10-year hip fracture probability were 15 cases in group 1 and 121 cases in group 2. In 193 patients of group 1, the mean 10-year fracture probability with BMD was significantly higher than the results without BMD (hip fracture: p=0.04, major osteoporotic fracture: p=0.01). Unlike the results of the group 1, the mean 10-year fracture probability without BMD was significantly higher than the results with BMD in 176 patients of group 2 (hip fracture: p=0.01, major osteoporotic fracture: p=0.01). CONCLUSIONS: Total of 136 cases (36.8%) as a high risk of the fracture with osteopenia could be overlooked treatment eligibility in Korean. The Korean FRAX model without BMD could be effective in predicting fracture risk especially in the individuals who were over 65 years.

The Influence of Fat Infiltration of Back Extensor Muscles on Osteoporotic Vertebral Fractures

STUDY DESIGN: Retrospective study. PURPOSE: To investigate the influence of fat infiltration at low back extensor muscles on osteoporotic vertebral fracture. OVERVIEW OF LITERATURE: In persons with stronger back muscles, the risk of osteoporotic vertebral fractures will likely be lower than in those persons with weaker back muscles. However, the degree of influence of fat infiltration of the back extensor muscle on osteoporotic vertebral fracture remains controversial. METHODS: Two hundred and thirty-seven patients who had undergone lumbar spine magnetic resonance imaging and bone mineral density (BMD) were enrolled in this study. The amount of low back extensor muscle was determined using the pseudocoloring technique on an axial view of the L3 level. The patients were divided into two groups: osteoporotic vertebral fracture group (group A) and non-fracture group (group B). The amount of low back extensor muscle is compared with BMD, degenerative change of disc, osteophyte grade of facet joint and promontory angle to reveal the association between these factors. RESULTS: A negative correlation is found between age and the amount of low back extensor muscle (p=0.001). The amount of low back extensor muscle in group A and group B was 60.3%+/-14.5% and 64.2%+/-9.3% respectively, thus showing a significantly smaller amount of low back extensor muscle in the osteoporotic vertebral fracture group (p=0.015). CONCLUSIONS: Fat infiltration of low back extensor muscle was increased in osteoporotic vertebral fracture patients. Therefore, fat infiltration of low back extensor muscle in an elderly person may be a risk factor of osteoporotic vertebral fracture.

Relationship between New Osteoporotic Vertebral Fracture and Instrumented Lumbar Arthrodesis

STUDY DESIGN: Retrospective study. PURPOSE: To evaluate the relationship between a new osteoporotic vertebral fracture and instrumented lumbar arthrodesis. OVERVIEW OF LITERATURE: In contrast to the growing recognition of the importance of adjacent segment disease after lumbar arthrodesis, relatively little attention has been paid to the relationship between osteoporotic vertebral fractures and instrumented lumbar arthrodesis. METHODS: Twenty five patients with a thoracolumbar vertebral fracture following instrumented arthrodesis for degenerative lumbar disorders (study group) were investigated. The influence of instrumented lumbar arthrodesis was examined by comparing the bone mineral density (BMD) of the femoral neck in the study group with that of 28 patients (control group) who had sustained a simple osteoporotic vertebral fracture. The fracture after instrumented arthrodesis was diagnosed at a mean 47 months (range, 7 to 100 months) after the surgery. RESULTS: There was a relatively better BMD in the study group, 0.67 +/- 0.12 g/cm2 compared to the control group, 0.60 +/- 0.13 g/cm2 (p = 0.013). The level of back pain improved from a mean of 7.5 +/- 1.0 at the time of the fracture to a mean of 4.9 +/- 2.0 at 1 year after the fracture (p = 0.001). However, 12 (48%) patients complained of severe back pain 1 year after the fracture. There was negative correlation between the BMD of the femoral neck and back pain at the last follow up (r = - 0.455, p = 0.022). CONCLUSIONS: Osteoporotic vertebral fractures after instrumented arthrodesis contribute to the aggravation of back pain and the final outcome of degenerative lumbar disorders. Therefore, it is important to examine the possibility of new osteoporotic vertebral fractures for new-onset back pain after lumbar instrumented arthrodesis.

Clinical Significance of the Rectus Abdominis Muscle Free Flap for Large Diabetic Ulcer and Necrosis of the Foot

The purpose of this study was to present the clinical significance of rectus abdominis free muscle flap for large sized diabetic ulcer and necrosis of the foot to salvage limb. From June 2000 to February 2006, eleven patients were included in our study. There were seven males and four females with a mean age of 58.3 years (48~65) at the surgery. All had a history of diabetics and subsequent huge soft tissue defect caused by necrotizing abscess formation around the foot and the ankle. After complete debridement of large sized, infected necrotic tissue, susceptible intravenous antibiotics and wound care were done. After control of infection, confirmed by clinical and laboratory findings, the rectus abdominis free muscle flap was applied to cover remained large soft tissue defect and to prevent the recurrence of infection. All flaps survived and it provided satisfactory coverage for the soft tissue defect on the foot and the ankle area for a mean of 41.1 months (24~85) follow up period. All except of one patients did not have any recurrence of infection on the operation site and could salvage their limbs. The rectus abdominis free muscle flap could be recommended for large sized soft tissue defect after necrotizing abscess in diabetic foot to salvage major limb.

Reconstruction of the Pretibial Soft Tissue Lesion after Chronic Tibia Osteomyelitis using Anterolateral Thigh Perforator Flap

The purpose of this study was to present the clinical result of anterolateral thigh free flap for pretibial soft tissue lesion after chronic tibia osteomyelitis. From December 2006 to September 2008, Five patients were included in our study. 4 of 5 were superficial or localized types of chronic tibia osteomyelitis, based on the classification of Cierny and Mader. Average age at the surgery was 45 years, three were males and two were females. All had a history of chronic tibia osteomyelitis and subsequent pretbial soft tissue lesions coming from previous operations or pus drainage. Pretibial soft tissue defects included small ulcers, fibrotic, bruisable soft tissue and small bony exposures, but not large-sized bony exposures nor active pus discharge. After complete debridement of large sized pretibial soft tissue lesions and decortication of anterior tibial cortical dead bone, anterolateral thigh free flap was applied to cover remained large pretibial soft tissue defect and to prevent the recurrence of infection. All flaps survived and provided satisfactory coverage of soft tissue defect on pretibial region for 16 months' mean follow up period. No patients has had recurrence of osteomyelitis. Anterolateral thigh free flap could be recommend for large sized pretibial soft tissue defect of supreficial or localized types of chronic tibia osteomyelitis after through debridement.