C M Chen

Chang Gung Memorial Hospital, Taipei, Taipei, Taiwan

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Publications (28)50.35 Total impact

  • C.-Y. Fann · F.-Y. Chiu · T.-Y. Chuang · C.-M. Chen · T.-H. Chen
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    ABSTRACT: Background: The high rate of nonunion makes surgical intervention necessary for a distal clavicle fracture. This report presents the outcome of a simple surgical method using a transacrominal Knowles pin for this unstable fracture. Methods: In this study, 32 patients with Neer type 2 distal clavicle fractures were treated using a single transacromial Knowles pin without repair of the torn ligament. All 32 patients were studied prospectively and followed up for a mean of 80 months (range, 12-132 months). The clinical outcome was evaluated with the UCLA score, and the fracture union was judged roentgenographically. Results: All the patients showed excellent results with solid union. The mean union time was 6.8 weeks (range, 4-12 weeks). No major complication was noted, and only one asymptomatic acromioclavicular arthrosis developed. Conclusions: Single transacrominal Knowles pin fixation offers a simple and safe method for treating patients with displaced Neer type 2 distal clavicle fractures.
    No preview · Article · May 2004
  • C M Chen · FY Chiu · W H Lo
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    ABSTRACT: We reported on 7 cases of avascular necrosis of the femoral head after treatment of an unstable intertrochanteric fracture with the Asian Pacific gamma-nail. The incidence was about 1.16% (7 of 604) in our series. Good reduction and good implant position were achieved in all 7 men. Avascular necrosis was found about 6 months to 3 years after the initial operation, and all the fractures were solidly united at the final diagnosis. The possible etiologies were initial high energy trauma and combining basal neck fracture and iatrogenic damage of the blood supply to the femoral head.
    No preview · Article · Nov 2001 · Archives of Orthopaedic and Trauma Surgery
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    FY Chiu · C.-F.J. Lin · C M Chen · W H Lo · TY Chaung
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    ABSTRACT: We have performed a prospective single-blinded randomised study to evaluate the role of antibiotic-impregnated cement in the prevention of deep infection at primary total knee arthroplasty (TKA) in patients with diabetes mellitus. We studied prospectively 78 arthroplasties performed for osteoarthritis in such patients. They were randomly separated into two groups. In group 1 (41 knees), cefuroxime-impregnated cement was used while in group 2 (37 knees) cefuroxime was not added to the cement. The preoperative, intraoperative and postoperative management was the same for both groups. The mean follow-up was 50 months (26 to 88). There were no cases of deep infection in group 1, but five (13.5%) occurred in group 2 (p = 0.021). We conclude that cefuroxime-impregnated cement is effective in the prevention of deep infection at primary TKA in patients with diabetes mellitus.
    Preview · Article · Aug 2001 · The Bone & Joint Journal
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    C M Chen · FY Chiu · W H Lo · TY Chung
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    ABSTRACT: We evaluated the effect of cerclage wiring in the open reduction and internal fixation of displaced both-column fractures of the acetabulum. This was a prospective clinical evaluation of such cases where the main surgical strategy was open reduction and internal fixation with cerclage wire and supplemental reconstruction plates. Data on 35 cases treated by open reduction (all via the triradiate approach)/internal fixations with cerclage wire and reconstruction plates were collected. The follow-up period was 40 months (18-69). Reduction with a fracture gap of less than 2 mm without articular stepping was achieved in all 35 cases. Postoperative complications developed in seven cases, including subcutaneous haematoma in two, wound infection in two and heterotopic ossification in three. All the complications had no adverse effect on the clinical outcome, and all the cases had good to excellent final results. Cerclage wiring is very useful and effective in the reduction and fixation of displaced both-column fractures of the acetabulum, and supplemental fixation with reconstruction plates and screws is necessary.
    Preview · Article · Jul 2001 · Injury
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    F.-Y. Chiu · C.-F. J. Lin · C.-M. Chen · W.-H. Lo · T.-Y. Chaung

    Preview · Article · Jul 2001 · Acoustics, Speech, and Signal Processing Newsletter, IEEE
  • T C Chen · K F Ng · L B Jeng · T S Yeh · C M Chen

    No preview · Article · Apr 2001 · Digestive Diseases and Sciences
  • L C Hwang · W H Lo · W M Chen · C F Lin · C K Huang · C M Chen
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    ABSTRACT: This study reviewed 66 intertrochanteric fractures in patients younger than 40 years old (average 33.0 years old; range 17-40 years old). In contrast to the usual population with intertrochanteric fractures, the factors male predominance (46/66), less pre-injury comorbidity (9/66), more outdoor high energy trauma (47/66), and more associated injuries (32/66) were evident. The distribution of associated injuries was wide. Some of them were life threatening. According to Boyd's classification, 20 were type I, 24 were type II, 13 were type III, and 9 were type IV. Twenty-nine were stable, and 37 were unstable. Stratified by the mechanism of injury, the difference in distribution between the subgroups was significant (p = 0.027, two-tail Fisher's exact test). Simple falls only caused Boyd type I and II fractures. Boyd type III or IV fractures were found more often after vehicular trauma or falls from a height. All the intertrochanteric fractures healed on average 70.5 days (range 31-213 days) after operation. The fractures resulting from vehicular trauma or fall from a height healed significantly more slowly (p = 0.02, univariant log-rank test). There were 6 intertrochanteric fracture-related complications. The mechanism of injury determines the character of intertrochanteric fractures in young adults. Given tougher bone stock, better healing ability, and less co-morbidity, proper management can lead to healing of all intertrochanteric fractures. The extent of functional recovery was also determined by the associated injuries.
    No preview · Article · Feb 2001 · Archives of Orthopaedic and Trauma Surgery
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    C M Chen · FY Chiu · W H Lo
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    ABSTRACT: The effect of semirigid Ender nails (EN) in the treatment of closed humeral shaft fractures was reviewed and analyzed. Clinical study was set retrospectively with detailed parameters. One hundred and eighteen closed humeral shaft fractures, treated with closed reduction and internal fixation with ENs, were collected. The follow-up period was 78 (24-175) months. The average operation blood loss was 105 cc, operation time was 57 min, hospital stay was 6.5 days, and union time was 10.5 weeks. The postoperative complications included three superficial infections, one iatrogenic radial nerve palsy, eight nail backouts, and eight nonunions. In our experience, for closed humeral shaft fractures fixed surgically, EN is a good choice for its simplicity and efficacy, but the fracture gap should be minimized after fixation and postoperative care should be closely observed.
    Preview · Article · Dec 2000 · Injury
  • C M Chen · F Y Chiu · T Y Chuang · W H Lo
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    ABSTRACT: Acetabular fracture is a controversial and difficult fracture to manage. We retrospectively evaluated the outcome of the traditional management of acetabular fractures. From 1987 to 1996, 112 cases of acetabular fracture presented at the Taipei Veterans General Hospital and were managed surgically in 73 cases and nonsurgically in 39 cases. The follow-up period was 90 (36-140) months. In the nonsurgically managed group, congruent reduction was achieved in 29 cases (74.3%) and good to excellent functional results were achieved in 25 cases (64.1%). In the surgically managed group, congruent reduction was achieved in 60 cases (82.2%) and good to excellent functional results were achieved in 57 cases (74.3%). In 51 (45.5%) cases, early or late complications developed after management, including one femoral artery perforation, one screw penetration, three wound infections, one iatrogenic sciatic nerve injury, one deep vein thrombosis, 21 heterotopic ossifications, two chondrolyses, three avascular necroses of the femoral head and 18 cases of symptomatic traumatic arthritis. The functional results correlated well with the final congruity of the joints and the severity of the complications.
    No preview · Article · Jun 2000 · Zhonghua yi xue za zhi = Chinese medical journal; Free China ed
  • C M Chen · FY Chiu · W H Lo · TY Chuang
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    ABSTRACT: We tried to find the trauma mechanism and treatment rationale of ipsilateral concomitant hip and distal femoral fractures involving the articular surface. Between 1988 and 1995, 15 cases of ipsilateral hip (confined to neck or trochanteric areas of the femur) and distal (confined to supra- and intercondylar area of the femur) femoral articular fractures were collected. The hip fractures consisted of 10 trochanteric fractures and five neck fractures, which were managed with reduction and fixation in 14 (Knowles' pin in eight, DHS in four and standard Gamma nail in two), and primary bipolar hemiarthroplastry in one. The distal femoral articular fractures were open in 11; these were managed with radical debridement, implantation of Septopal chains and immediate internal fixation, followed by prophylactic autogenous bone grafting 6 weeks later in the recent six cases (five Judet plates, four dynamic condylar screws and two condylar plates). The other four closed distal femoral fractures were managed with early reduction and internal fixation (two Judet plate, one dynamic condylar screw and one condylar plate). The union time was 20.3 (12-48) weeks for proximal fractures and 23.7 (12-36) weeks for distal fractures. Early infection developed in three cases. Nonunion of a femoral neck fracture developed in one case. The other complications were implant failure in one, coxa vara in one, refracture in one, delayed union in one and knee stiffness in one.
    No preview · Article · May 2000 · Injury
  • FY Chiu · C M Chen · W H Lo
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    ABSTRACT: Seventy-two displaced acetabular fractures managed surgically were evaluated retrospectively. The follow-up period was 10 (6-14) yr. The commonest fractures were posterior wall (28) and both columns (10). The surgical approaches were Kocher-Langenbeck (47), ilioinguinal (19) and extended iliofemoral (6). No neural monitoring was used in operations and no preventive agents for heterotopic ossification or thromboembolism were used perioperatively. Reduction was rated congruent in 59 (81.9%) and noncongruent in 13 (18.1%). The early postoperative complications were 1 vascular injury, 1 iatrogenic sciatic nerve injury, 1 deep vein thrombosis and 2 wound infections. The late complications were heterotopic ossification in 20 patients, avascular necrosis of the femoral head in 4 and symptomatic arthritis in 10. Functional outcomes were rated as excellent in 31, good in 23, fair in 7 and poor in 11. Our results show that traditional management is effective enough for displaced acetabular fractures.
    No preview · Article · May 2000 · Injury
  • M C Chang · W H Lo · C M Chen · T H Chen
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    ABSTRACT: This article reports on the use of double-strut, free vascularized fibular grafts to treat six patients with infected nonunion or traumatic bone loss in the femur or tibia after prolonged treatment and multiple operations. The defects were 6-13 cm long. Five patients achieved solid union within 6 months, and one patient required additional cancellous grafting to achieve union at the distal end of the fibula. One patient experienced a stress fracture due to strenuous exercise, and union was achieved 3 months after reapplying an external fixator. Although three patients had some restricted knee motion, all patients had a satisfactory outcome in regard to walking, and no limb-length discrepancies were noted in any patient.
    No preview · Article · Sep 1999 · Orthopedics
  • C M Chen · T C Lu · W H Lo · F Y Chiu
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    ABSTRACT: A case of Salmonella enteritidis group C infection following total hip replacement was treated by resectional arthroplasty and appropriate antibiotics. Total hip replacement with reimplantation of an antibiotic-impregnated cemented hip prosthesis was performed five months later. The postoperative course was smooth and hip function was good, without any sign of infection recurrence throughout 10 years of follow-up. The treatment protocol and clinical results are discussed along with a review of the literature.
    No preview · Article · Aug 1999 · Zhonghua yi xue za zhi = Chinese medical journal; Free China ed
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    L R You · C M Chen · T S Yeh · TY Tsai · R T Mai · C H Lin · Y. H. W. Lee
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    ABSTRACT: The nucleocapsid core protein of hepatitis C virus (HCV) has been shown to trans-act on several viral or cellular promoters. To get insight into the trans-action mechanism of HCV core protein, a yeast two-hybrid cloning system was used for identification of core protein-interacting cellular protein. One such cDNA clone encoding the DEAD box family of putative RNA helicase was obtained. This cellular putative RNA helicase, designated CAP-Rf, exhibits more than 95% amino acid sequence identity to other known RNA helicases including human DBX and DBY, mouse mDEAD3, and PL10, a family of proteins generally involved in translation, splicing, development, or cell growth. In vitro binding or in vivo coimmunoprecipitation studies demonstrated the direct interaction of the full-length/matured form and C-terminally truncated variants of HCV core protein with this targeted protein. Additionally, the protein's interaction domains were delineated at the N-terminal 40-amino-acid segment of the HCV core protein and the C-terminal tail of CAP-Rf, which encompassed its RNA-binding and ATP hydrolysis domains. Immunoblotting or indirect immunofluorescence analysis revealed that the endogenous CAP-Rf was mainly localized in the nucleus and to a lesser extent in the cytoplasm, and when fused with FLAG tag, it colocalized with the HCV core protein either in the cytoplasm or in the nucleus. Similar to other RNA helicases, this cellular RNA helicase has nucleoside triphosphatase-deoxynucleoside triphosphatase activity, but this activity is inhibited by various forms of homopolynucleotides and enhanced by the HCV core protein. Moreover, transient expression of HCV core protein in human hepatoma HuH-7 cells significantly potentiated the trans-activation effect of FLAG-tagged CAP-Rf or untagged CAP-Rf on the luciferase reporter plasmid activity. All together, our results indicate that CAP-Rf is involved in regulation of gene expression and that HCV core protein promotes the trans-activation ability of CAP-Rf, likely via the complex formation and the modulation of the ATPase-dATPase activity of CAP-Rf. These findings provide evidence that HCV may have evolved a distinct mechanism in alteration of host cellular gene expression regulation via the interaction of its nucleocapsid core protein and cellular putative RNA helicase known to participate in all aspects of cellular processes involving RNA metabolism. This feature of core protein may impart pleiotropic effects on host cells, which may partially account for its role in HCV pathogenesis.
    Preview · Article · May 1999 · Journal of Virology
  • T C Chen · J M Lien · K F Ng · C J Lin · YP Ho · C M Chen

    No preview · Article · Mar 1999 · Gastrointestinal Endoscopy
  • C M Chen · F Y Chiu · W H Lo · Y L Huang · T H Chen · C K Huang
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    ABSTRACT: To define the efficacy of dynamic compression plates (DCPs) for the treatment of closed humeral shaft fractures. A total of 165 patients with closed humeral shaft fractures were studied retrospectively. There were 120 patients who underwent open reduction and internal fixation with DCPs and no bone grafting (BG). Forty-five patients received the same procedures with BG. The mean follow-up period was 93 months. In the DCP without BG group, the average blood loss was 350 ml, operation time was 105 minutes, hospital stay was 8.5 days and fracture union time was 13.5 weeks. In the DCP with BG group, the average blood loss was 525 ml, operation time was 115 minutes, hospital stay was 7.9 days and fracture union time was 9.2 weeks. In our experience, DCPs are effective for surgical fixation of humeral shaft fractures. Prophylactic BG is recommended for cases with more comminution.
    No preview · Article · Nov 1998 · Zhonghua yi xue za zhi = Chinese medical journal; Free China ed
  • F Y Chiu · C M Chen · C F Lin · W H Lo · Y L Huang · T H Chen
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    ABSTRACT: We tried to define the roles of the rigid dynamic compression plate (DCP) and the semi-rigid Ender nail (EN) in the treatment of closed humeral shaft fractures. A prospective, randomized clinical study was performed with detailed comparison parameters. Ninety-one closed humeral shaft fractures were treated. Randomly, 30 humeri were treated with open reduction and internal fixation with DCP and no bone grafting (BG), 29 were treated with the same procedure but with BG, and 32 were treated with closed reduction and internal fixation with Ender nails. The average follow-up period was 32 months (range, 13-54 months). In the group with DCP without BG, the average blood loss was 270 mL, operation time was 92 minutes, hospital length of stay was 6.5 days, and union time was 12.5 weeks. In the group with DCP with BG, the average blood loss was 325 mL, operation time was 108 minutes, hospital length of stay was 6.9 days, and union time was 9.4 weeks. In the EN group, the average blood loss was 114 mL, operation time was 54 minutes, hospital length of stay was 5.6 days, and union time was 9.9 weeks. Analysis of variance and Fisher's exact test were used to evaluate the statistical significance. In our experience, for humeral shaft fractures fixed surgically, EN is better than DCP without BG. When DCP is chosen for the means of fixation, prophylactic BG is recommended, especially in cases with more comminution.
    No preview · Article · Jan 1998 · The Journal of trauma
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    C.M. Chen · L.R. You · L.H. Hwang · Y.-H.W. Lee
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    ABSTRACT: Previous studies suggest that the core protein of hepatitis C virus (HCV) has a pleiotropic function in the replication cycle of the virus. To understand the role of this protein in HCV pathogenesis, we used a yeast two-hybrid protein interaction cloning system to search for cellular proteins physically interacting with the HCV core protein. One such cellular gene was isolated and characterized as the gene encoding the lymphotoxin-beta receptor (LT-betaR). In vitro binding analysis demonstrated that the HCV core protein binds to the C-terminal 98 amino acids within the intracellular domain of the LT-betaR that is involved in signal transduction, although the binding affinity of the full-length HCV core protein was weaker than that of its C-terminally truncated form. Our results also indicated that the N-terminal 40-amino-acid segment of the HCV core protein was sufficient for interaction with LT-betaR and that the core protein could form complexes with the oligomeric form of the intracellular domain of LT-betaR, which is a prerequisite for downstream signaling of this receptor. Similar to other members of the tumor necrosis factor (TNF) receptor superfamily, LT-betaR is involved in the cytotoxic effect of the signaling pathway, and thus we have elucidated the biological consequence of interaction between the HCV core protein and LT-betaR. Our results indicated that in the presence of the synergizing agent gamma interferon, the HCV core protein enhances the cytotoxic effects of recombinant forms of LT-betaR ligand in HeLa cells but not in hepatoma cells. Furthermore, this enhancement of the cytolytic activity was cytokine specific, since in the presence of cycloheximide, the expression of the HCV core protein did not elicit an increase in the cytolytic activity of TNF in both HeLa and hepatoma cells. In summary, the HCV core protein can associate with LT-betaR, and this protein-protein interaction has a modulatory effect on the signaling pathway of LT-betaR in certain cell types. Given the known roles of LT-betaR/LT-alpha1,beta2 receptor-ligand interactions in the normal development of peripheral lymphoid organs and in triggering cytolytic activity and NF-kappaB activation in certain cell types, our finding implies that the HCV core protein may aggravate these biological functions of LT-betaR, resulting in pathogenesis in HCV-infected cells.
    Preview · Article · Jan 1998 · Journal of Virology
  • C M Chen · C S Wu · S L Tasi · C F Hung · T C Chen
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    ABSTRACT: A wide variety of neoplastic lesions may involve the ampulla of Vater, but squamous cell carcinoma has not been reported. Here we report a case of squamous cell carcinoma of papilla Vater. A 72-year-old Chinese female was manifested by obstructive jaundice and biliary tract infection. Duodenoscopic study revealed a polypoid mass with deep and broad ulcer on the ampulla of Vater. Histological examination revealed a metastatic squamous cell carcinoma. The gynecologist had examined the patient carefully and revealed a negative tumor survey. Other sources were also intensively studied but which revealed nothing. The patient developed biliary tree infection after endoscopic retrograde cholangiopancreatic study so that percutaneous transhepatic cholangiography & drainage was performed. Pseudomonas aeruginosa and Enterococcus were cultured from the drainaged bile. Radiotherapy was used and the bleeding was halted temporarily but the patient later expired due to persistent bleeding.
    No preview · Article · Sep 1996
  • Y L Huang · F Y Chiu · W H Lo · T H Chen · C M Chen
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    ABSTRACT: This retrospective study aims to evaluate the effect of Ender nail in management of unstable closed tibial fractures. From January 1985 to May 1992, 99 cases of unstable closed tibial shaft fractures (with fibular fractures) were collected for retrospective study. All the 99 tibiae were fixed with Ender nails. The mean follow up period was 80 (26-115 months). The clinical results were evaluated with special charts. The average blood loss was 126 ml. Operation time was 45 minutes. Hospital day was 10.2 days. Union time was 16.8 weeks for Winquist-Hansen (WH) type I-II fractures and 20.5 weeks for VVH type III-V fractures. Student t test revealed statistically significant differences between the clinical results of WH type I-II cases and those of WH type III-V cases. The postoperative complications included superficial infection in 1 case (1%), nail protrusion in 13 (13%), malunion in 10 (10%), aseptic nonunion in 2 (2%) and infected nonunion in 1 (1%) (overall 18% in the 99 cases). Ender nail is no doubt effective in treatment of less comminuted unstable tibial shaft fractures, but should be used carefully for more comminuted unstable tibial shaft fractures.
    No preview · Article · Sep 1996 · Zhonghua yi xue za zhi = Chinese medical journal; Free China ed

Publication Stats

597 Citations
50.35 Total Impact Points

Institutions

  • 1999-2001
    • Chang Gung Memorial Hospital
      • • Department of Pathology
      • • Division of Hepato-Gastroenterology
      Taipei, Taipei, Taiwan
  • 1996-2001
    • National Yang Ming University
      • Department of Biochemistry
      T’ai-pei, Taipei, Taiwan
  • 1996-2000
    • Taipei Veterans General Hospital
      • • Department of Orthopedics
      • • Department of Physical Medicine and Rehabilitation
      T’ai-pei, Taipei, Taiwan