[Ultrasound, abdominal X-ray and dual-source CT in the diagnosis of colon tumor mechanical obstruction].

Objective: To study the value of ultrasound, abdominal X-ray, and dual-source CT (DSCT) in the diagnosis of colon tumor obstruction.

Methods: A retrospective analysis was conducted among 45 patients who were admitted to our department between October 2010 and August 2011 for abdominal pain. All the patients underwent ultrasound, abdominal X-ray and DSCT examinations and subsequent surgical interventions, which confirmed the diagnosis of colon tumor obstruction.

[Imaging findings of craniopharyngioma in relation to its surgical management: a retrospective analysis].

Objective: To analyze the CT and magnetic resonance imaging (MRI) findings of craniopharygioma and explore the correlation between the pathological findings and clinical features of the disease.

Methods: The CT and MRI findings of 123 pathologically confirmed craniopharygioma cases were reviewed retrospectively in conjunction with the pathological findings and surgical data.

Results: This patient cohort consisted of 70 male and 53 female patients with their age ranging from 1 to 72 years (mean 23.

[High-field MRI and pathological diagnosis of supratentorial primitive neuroectodermal tumors].

Objective: To analyze the magnetic resonance imaging (MRI) features of supratentorial primitive neuroectodermal tumors (sPNET) and improve the diagnosis of this disease.

Methods: MRI manifestations of 14 cases of PNET were retrospectively analyzed and compared with their pathological features.

Results: The supratentorial lesions involved the occipital lobe in 4, frontal lobe in 3, fronto-occipital lobe in 2, temporo-occipital lobe in 3, lateral ventricle in 1 case and the saddle region in 1.

[Clinical value of multislice spiral CT in caudal block].

Objective: To explore a new method for body surface orientation of the puncture site, determination of the direction of the needling and puncture depth for caudal block.

Methods: Three-dimensional reconstruction of the pelvis was performed in 8 cases for measuring the distances between the sacral hiatus and the planned site of anesthetic delivery and the size of the sacral hiatus. After image processing with the technique of shaded surface display (SSD), the shapes of sacral hiatus and sacral tube were evaluated.

[Value of multislice spiral CT scanning and three-dimensional reconstruction in selecting optimal length and shape of mandible internal fixation material].

Objective: To investigate the value of multislice spiral CT (MSCT) scanning and three-dimensional reconstruction in selecting optimal length and shape of mandible internal fixation material.

Methods: Three-dimensional reconstruction of the mandible was performed in 5 cases by MSCT scanning and the length of the mandible for operation was measured. Some isometric points were chosen on the mandibular curve and the distance from these points to the two ends of the curve was measured to depict the mandibular curve using a self-designed skeletal curve-depicting software.

[Fabrication of laryngeal cartilage by means of tissue engineering technique].

Objective: To explore the method of fabricating tissue engineered laryngeal cartilage.

Methods: The rib and articular cartilage of infant New Zealand white rabbits were harvested in sterile condition. The chondrocytes were separated by collagenase digestion and cultured in vitro for 3 passage.

[Finger reconstruction with extended free second toe flap transfer].

Objective: To investigate an ideal method for finger reconstruction with extended the second toe flap transfer.

Methods: The second toe free flap was created, combined with an pedicled skin flap from the fibular side of the great toe inlaid in the ventral side of the second toe, a double-wing flap and the distal part of the metatarsal bone. The composite free flap was transferred by vascular anastomosis for finger reconstruction.

[An experimental study of treatment of comminuted distal femur fracture with locked double- plating].

Objective: To explore new techniques for the treatment of comminuted distal femoral fractures to promote functional restoration and reduce the complications of the fracture.

Methods: Sixteen adult canines were selected for this study, and the experimental and control hindlimb for each canine were randomly determined. Distal comminuted fracture (AO/ASIF Type C2) was induced in both sides of the canine's femurs, and one side was fixed with the double plates (steel plate and polyethylene plate), whereas the other with a single steel plate.

[Biomechanical study of double-plate fixation for comminuted fractures of the distal femur].

Objective: To explore the new treatment approach for comminuted fractures of the distal femur.

Methods: Supra- and intercondylar comminuted fractures were induced in the femurs of 20 fresh adult cadavers, 10 of which received fixation with lateral steel plates and medial polyethylenes plates while the rest with single plate in the lateral only. Biomechanical tests of bending, torsion and compression were performed.

[mRNA expression of recombinant human bone morphogenetic protein 7 in skeletal muscle satellite cells with retroviral vector-mediated rhBMP7 gene transfection].

Objective: To detect the expression of recombinant human bone morphogenetic protein7 (rhBMP7) in skeletal muscle satellite cells (SMSCs) with rhBMP7 gene transfection mediated by retroviral vector.

Methods: rhBMP7 gene was reconstructed in retroviral vector and transferred into packaging cells PT67 via liposome reagent, with the positive cell clones selected with G418. In vitro cultured SMSCs were transfected with the virus granules secreted by PT67 cells and followed by G418 selection.