Tile Type C Pelvic Fractures: Initial Management, Surgery and Rehabilitation Results of 12 Cases with Literature Review

We report the results of 12 patients followed for Tile type C pelvic fractures treated with percutaneous sacroiliac screwing combined to anterior ring reduction and fixation provided by plate or external fixator during the last 4 years. this study was carried out in the light of literature review to focus on the therapeutic principles of the initial management, the different surgical techniques described for the definitive treatment of bone lesions, the current attitude regarding the rehabilitation of patients and the perspectives under development.

Design and Research of Highly Integrated Multi-channel Tile-type T/R Module

This paper introduces a design scheme and key technology of a multi-channel tile-type T/R module. In order to meet the requirements of high reliability, miniaturization, lightweight and multi-functional integration, a vertical interconnection design method of high integrated multi-channel tile-type T / R module is proposed. LTCC technology is used to achieve high-density stacking of radio frequency devices, while bare chips are used to improve system integration and reliability. The module integrates 4 isolated transceiver channels with a size of 40mm×40mm×10mm, which significantly reduces the volume and weight compared to the traditional T/R module structure. The module simulation results prove that the design scheme is easy to implement and fault location maintenance, and the test results meet the design indicators.

Non-Traumatic Tile Type B3 Pelvic Fracture Combined With Garden Type III Femoral Neck Fracture Caused By Hypocalcaemia-Induced Convulsions

BACKGROUND Non-traumatic fractures caused by convulsions are relatively rare and are often overlooked due to the lack of obvious evidence of injury. Non-traumatic fractures due to convulsions are diverse, but the concomitant of pelvic and femoral fractures has not been reported previously. CASE SUMMARY A 47-year-old woman with a no significant medical history, was taken to the nearest hospital after one episode of generalized tonic-clonic seizure that had occurred during sleep. After the postictal phase, the patient regained consciousness and experienced diffuse pain in the inguinal regions bilaterally with inability to stand or walk. The entire attack was witnessed by the family members who confirmed that there was not external trauma. Blood investigations revealed high creatinine and uric acid levels, along with a low calcium level. Conventional radiograph of the pelvis was performed to detect the cause of pain. The patient was noted to have a pelvic fracture and unilateral fracture of the neck of the femur. She was then transferred to our hospital for further management. The patient was diagnosed as having Tile type B3 pelvic fractures combined with a Garden type III femoral neck fracture on three-dimensional computed tomography (3D-CT). In view of her blood results, nephrology consultation was sought. The patient was identified as having a stage 5 chronic kidney disease (CKD), hypocalcemia, and hyperphosphatemia. However, neurological examination showed no abnormalities. No surgical intervention was adopted for her pelvic fractures. In addition to complete bed rest, closed reduction and percutaneous cannulated screw fixation was performed for the treatment of the right femoral neck fracture. An arteriovenous fistula was created for maintenance hemodialysis on the tenth postoperative day. At follow-up, twelve months follow-up after the operation, the patient had a normally gait and was satisfied with the outcome. CONCLUSION Patients who present with convulsive seizures especially patients with ion metabolism disorder should be examined thoroughly to ensure that no injury is missed.

Virtual Mosaic Knot Theory

Mosaic diagrams for knots were first introduced in 2008 by Lomanoco and Kauffman for the purpose of building a quantum knot system. Since then, many others have explored the structure of these knot mosaic diagrams, as they are interesting objects of study in their own right. Knot mosaics have been generalized by Garduño to virtual knots, by including an additional tile type to represent virtual crossings. There is another interpretation of virtual knots, however, as knot diagrams on surfaces, which inspires this work. By viewing classical mosaic diagrams as [Formula: see text]-gons and gluing edges of these polygons, we obtain knots on surfaces that can be viewed as virtual knots. These virtual mosaics are our present objects of study. In this paper, we provide a set of moves that can be performed on virtual mosaics that preserve knot and link type, we show that any virtual knot or link can be represented as a virtual mosaic, and we provide several computational results related to virtual mosaic numbers for small classical and virtual knots.

Investigation of an Inset Micro Permanent Magnet Synchronous Motor Using Soft Magnetic Composite Material

This paper presents the world’s smallest inset permanent magnet synchronous motor (PMSM) with a soft magnetic composite (SMC) core, providing ease of manufacturing for micromachine applications without silicon steel laminations. The inset motor can offer an additional reluctance torque and higher torque density with a lower usage amount of permanent magnet. A 15 mm diameter inset motor was developed with the thickness of a tile-type permanent magnet which is limited to 1 mm by the manufacturer. The motor was designed with high torque density and low torque ripple by varying the interpole iron width for the rotor. Two inset motors were made using both SMC and silicon steel materials for comparison. The performance of the SMC motor was inferior to the silicon steel motor, but it still meets the specifications of the commercial market. If the thickness of the tile-type permanent magnet is further reduced, the micro inset motor with a SMC core can be easily mass-manufactured using powder sintering.

A Study on Mode of Injury, Types of Fractures and Associated Trauma in Unstable Pelvic Fractures

Aim: The present study was aimed to analyze the mode of injury, different type of fractures and associated injuries in patients with unstable pelvic fractures who are later managed by surgical interventions. Materials and Methods: The study involved 21 cases of unstable pelvic injuries (Tile type B and C) managed surgically patients. Results: The result showed that out of 21 patients, 6 patients (28.6%) had associated skeletal and/or soft tissue injuries. Of which 9.4% (n=2) patients had nerve injury. Despite aggressive resuscitation including application of external fixators, the mortality of 10-20% remain unchanged. Conclusion: Anatomic reduction and internal fixation of unstable pelvic injuries gives excellent stability, allows for early mobility with good functional outcome.