A simple method to estimate elastic follow-up factors for transient creep parameter C(t) under secondary stress

2016 ◽  
Vol 51 (5) ◽  
pp. 336-346 ◽  
Author(s):  
Jinho Je ◽  
Kukhee Lee ◽  
Yunjae Kim ◽  
Dongwook Jerng
Keyword(s):  
Transient Creep ◽  
Creep Parameter ◽  
Secondary Stress ◽  
Simple Method

Staged Management of Severely Displaced Calcaneal Fractures With Transarticular Pinning: A Damage Control Strategy

2021 ◽  
pp. 107110072110130
Author(s):  
Kyeong-Hyeon Park ◽  
Chang-Wug Oh ◽  
Joon-Woo Kim ◽  
Hee-June Kim ◽  
Dong-Hyun Kim ◽  
...  
Keyword(s):  
Soft Tissue ◽  
Internal Fixation ◽  
Kirschner Wire ◽  
Wound Complications ◽  
Calcaneal Fractures ◽  
Simple Method ◽  
Wire Fixation ◽  
The Mean ◽  
Radiographic Union

Background: Severely displaced calcaneal fractures can result in considerable morphology derangement and may be accompanied by soft tissue compromise. Delayed operative restoration of the calcaneal morphology may result in acute retensioning of the damaged soft tissue with associated wound-related complications. In this study, we describe a staged treatment of displaced intra-articular calcaneal fractures that uses temporary transarticular Kirschner wire (K-wire) fixation and staged conversion to definite fixation. Methods: We identified all of the patients who were treated at our institution for calcaneal fractures between 2015 and 2019. A total of 17 patients with 20 calcaneal fractures were selectively treated with 2-stage management. Temporary transarticular K-wire fixation was performed 24 hours after the injury to restore calcaneal morphology and the surrounding soft tissue. After the soft tissue was considered safe, delayed open reduction and internal fixation was performed. The time to definite surgery, radiographic alignment, wound complications, time to radiographic union, and hindfoot American Orthopaedic Foot & Ankle Society (AOFAS) scores were recorded. Results: The average follow-up period was 17 months (range, 12-43). The average Böhler angle increased from a mean of −22 degrees (range, −109 to 25) to 25 degrees (range, 0 to 47) after temporary transarticular K-wire fixation. The mean time from temporary pinning to conversion to definite internal fixation was 20 (range, 10-32) days. There were no immediate postoperative complications. The average time to radiographic union was 13.7 (range, 10-16) weeks. The mean AOFAS score was 87 (range, 55-100). No infections or wound complications were reported during the follow-up period. Conclusion: Temporary transarticular pinning for staged calcaneal fracture treatment is safe and effective in restoring the calcaneal morphology. This novel and relatively simple method may facilitate delayed operation and decrease wound-related complications. Level of Evidence: Level IV, retrospective case series.

scholarly journals Comparing Patient and Endoscopist Perceptions of the Colonoscopy Indication

2010 ◽  
Vol 24 (11) ◽  
pp. 656-660 ◽  
Author(s):  
Maida J Sewitch ◽  
Dara Stein ◽  
Lawrence Joseph ◽  
Alain Bitton ◽  
Robert J Hilsden ◽  
...  
Keyword(s):  
Kappa Statistic ◽  
Cross Sectional Study ◽  
Routine Screening ◽  
Self Report ◽  
Administrative Databases ◽  
Screening Colonoscopy ◽  
Cross Sectional ◽  
Simple Method ◽  
Patient Questionnaires

BACKGROUND: Determining whether a colonoscopy is performed for screening or nonscreening purposes can facilitate clinical practice and research. However, there is no simple method to determine the colonoscopy indication using patient medical files or health administrative databases.OBJECTIVE: To determine patient-endoscopist agreement on the colonoscopy indication.METHODS: A cross-sectional study was conducted among staff endoscopists and their patients at seven university-affiliated hospitals in Montreal, Quebec. The study participants were 50 to 75 years of age, they were able to understand English or French, and were about to undergo colonoscopy. Self- (endoscopist) and interviewer-administered (patient) questionnaires ascertained information that permitted classification of the colonoscopy indication. Patient colonoscopy indication was defined as the following: perceived screening (routine screening, family history, age); perceived nonscreening (follow-up); medical history that implied nonscreening; and a combination of the three preceding indications. Agreement between patient and endoscopist indications was measured using concordance and Kappa statistic.RESULTS: In total, 702 patients and 38 endoscopists participated. The three most common reasons for undergoing colonoscopy were routine screening/regular check-up (33.8%), follow-up to a previous problem (30.2%) and other problem (24.6%). Concordance (range 0.79 to 0.85) and Kappa (range 0.58 to 0.70) were highest for perceived nonscreening colonoscopy. Recent large bowel symptoms accounted for 120 occurrences of disagreement in which the patient perceived a nonscreening colonoscopy while the endoscopist perceived a screening colonoscopy.CONCLUSIONS: Patient self-report may be an acceptable means for rapidly assessing whether a colonoscopy is performed for screening or nonscreening purposes. Delivery of patient-centred care may help patients and endoscopists reach a shared understanding of the reason for colonoscopy.

scholarly journals Candy Closure Technique for Chronic Open Infective Lateral Malleolus Bursitis

2019 ◽  
Vol 2019 ◽  
pp. 1-5
Author(s):  
Jin Su Kim ◽  
Woo Jong Kim ◽  
Ki Won Young ◽  
Kyu Hwan Bae ◽  
Han Hoon Kim ◽  
...  
Keyword(s):  
Dead Space ◽  
Primary Closure ◽  
Complete Healing ◽  
Lateral Malleolus ◽  
Closure Technique ◽  
Simple Method ◽  
Secondary Operation ◽  
Control Infection

The aim of this study was to report the effectiveness of the Candy closure technique as a treatment for chronic open infective lateral malleolus bursitis. From June 2014 to March 2018, we performed the Candy closure technique as a treatment for chronic open infective lateral malleolus bursitis in nine patients without secondary operation. We first performed infectious tissue debridement to control infection, and if primary closure was not possible, we performed the Candy closure technique for small wounds. The duration of the wound prior to surgery varied from 4 weeks to 2 years. Seven cases were due to infection on the bursa and two cases were ulcer-type bursitis. All the wounds were small (average, 3.80 cm2; range, 2.25-4 cm2) and circular. Seven wounds showed complete healing at 4 weeks after surgery, one wound showed complete healing at 8 weeks after surgery, and one wound with infected state was lost to missing follow-up. Of the seven wounds that showed complete healing, one wound recurred 6 months after surgery. The Candy closure technique is a simple method for ensuring healing and coverage of chronic open lateral malleolus bursitis, especially for small wounds with dead space.

scholarly journals Surgical management of sacral meningeal cysts by obstructing the communicating holes with muscle graft

2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Kai Yang ◽  
Huiren Tao ◽  
Chaoshuai Feng ◽  
Jiawei Xu ◽  
Chunguang Duan ◽  
...  
Keyword(s):  
Cyst Wall ◽  
Simple Method ◽  
Muscle Graft ◽  
Meningeal Cyst ◽  
Dural Sac ◽  
Neurological Score ◽  
Male Patients ◽  
Meningeal Cysts

Abstract Background The surgical indication and treatment of sacral meningeal cyst have not been well established and current methods are usually accompanied by complications and recurrence. The aim of this study is to discuss the treatment of symptomatic sacral meningeal cyst, by investigating the surgical results of our surgically treated patients, and minimize the complications and recurrence. Methods We retrospectively reviewed all patients with symptomatic sacral meningeal cysts who were surgically treated by a single surgeon in the same institution from 2002 to 2017. All patients underwent the same operation by incising the cyst wall and obstructing the communicating hole with muscle graft, while the cyst wall was left untreated instead of resected or imbricated. The obstruction was verified by doing a Valsalva-like maneuver. The preoperative symptoms and signs, and the outcomes at most recent follow-up were rated and compared by Neurological Scoring System. Results A total of 18 patients (7 male patients and 11 female patients, average age 42.3 years) were followed up for an average of 51.7 months. All patients had communicating holes linking the cysts and the dural sacs. The average preoperative neurological score was 19.7 ± 2.2, and it was improved to 23.2 ± 2.8 at the most recent follow-up (p < 0.01). Conclusions The sacral meningeal cyst originated from the communication with the dural sac. Surgical treatment of symptomatic sacral meningeal cysts can yield a long-term resolution of the appropriately selected patient’s symptoms. Obstructing the communicating hole with muscle graft is an effective and simple method to obliterate the cyst. The incised cyst wall can be left untreated instead of resected or imbricated.

scholarly journals Management of Cerebrospinal Fluid Rhinorrhea in the Sphenoid Sinus Lateral Recess Through an Endoscopic Endonasal Transpterygoid Approach With Obliteration of the Lateral Recess

2020 ◽  
pp. 014556132095514
Author(s):  
Chao He ◽  
Hong-Tao Zhen
Keyword(s):  
Cerebrospinal Fluid ◽  
Sphenoid Sinus ◽  
Surgical Repair ◽  
Endoscopic Endonasal ◽  
Simple Method ◽  
Lateral Recess ◽  
Cerebrospinal Fluid Rhinorrhea ◽  
Surgical Access ◽  
Skull Base Defect

Background: Cerebrospinal fluid rhinorrhea in the sphenoid sinus lateral recess is a rare occurrence and poses unique challenges due to limited surgical access for surgical repair. Objective: To report our experience of surgical repair of cerebrospinal fluid rhinorrhea in the sphenoid sinus lateral recess through an endoscopic endonasal transpterygoid approach with obliteration of the lateral recess. To evaluate the efficiency of this surgical procedure. Methods: A retrospective study. Twelve cases with cerebrospinal fluid rhinorrhea in the sphenoid sinus lateral recess were reviewed. Assisted by image-guided navigation, cerebrospinal fluid rhinorrhea was repaired through an endoscopic endonasal transpterygoid approach, with obliteration of the lateral recess. Complications and recurrence were recorded. Medical photographs were used. Results: This surgical approach provided a relatively spacious corridor to dissect the sphenoid sinus lateral recess and do postoperative surveillance. The repair area completely healed in 3 months after surgery. Cerebrospinal fluid rhinorrhea in the sphenoid sinus lateral recess was successfully repaired on the first attempt in all cases (100%). No main complications or recurrence was observed during a mean follow-up time of 40.3 months. Conclusion: The endoscopic endonasal transpterygoid approach gives appropriate access for the treatment of spontaneous cerebrospinal fluid rhinorrhea in the sphenoid sinus lateral recess. Multilayer reconstruction of a skull base defect with obliteration of the lateral recess is a reliable and simple method.

Elastic Follow-Up Factors to Estimate C(t) Under Secondary Loading

2012 ◽  
Author(s):  
Kuk-Hee Lee ◽  
Yun-Jae Kim ◽  
Robert A. Ainsworth ◽  
David Dean
Keyword(s):  
Crack Growth ◽  
Creep Crack Growth ◽  
Transient Creep ◽  
Independent Method ◽  
Finite Element Analyses ◽  
Creep Crack ◽  
Reference Stress ◽  
Growth Increase ◽  
Plastic Creep

This paper proposes a method to determine the elastic follow-up factors for C(t)-integral under secondary stress. The rate of creep crack growth for transient creep is correlated with C(t)-integral. The elastic follow-up behaviour, which occurs in structures under secondary loading, prevents a relaxation of stress during transient creep. Thus, both the value of C(t) and creep crack growth increase with an increasing elastic follow-up. An estimation solution for C(t) has been proposed by Ainsworth and Dean based on the reference stress method. In order to predict the value of C(t) using this solution, an independent method to determine the elastic follow-up factors for cracked bodies is required. This paper proposes that the elastic follow-up factors for C(t) can be determined by elastic-plastic analyses by using the plastic-creep analogy. Finite element analyses have been performed to verify this method.

scholarly journals Follow-up of a simple method for aortic valve reconstruction with fixed pericardium in children

2017 ◽  
Vol 25 (6) ◽  
pp. 983-984 ◽  
Author(s):  
Amir-Reza Hosseinpour ◽  
Alejandro Adsuar-Gómez ◽  
Antonio González-Calle ◽  
Antonio Moruno-Tirado ◽  
Francisco García-Angleu ◽  
...  
Keyword(s):  
Aortic Valve ◽  
Simple Method ◽  
Valve Reconstruction

Antegrade Transsphenoidal Vidian Neurectomy: Short-Term Surgical Outcome Analysis

2011 ◽  
Vol 25 (6) ◽  
pp. e217-e220 ◽  
Author(s):  
Wan-Fu Su ◽  
Shao-Cheng Liu ◽  
Feng-Shiang Chiu ◽  
Chia-Hsuan Lee
Keyword(s):  
Allergic Rhinitis ◽  
Surgical Outcomes ◽  
Transsphenoidal Approach ◽  
Type I ◽  
Type Ii ◽  
Short Term ◽  
Surgical Morbidity ◽  
Simple Method ◽  
Vidian Neurectomy

Background Vidian neurectomy was an option for treating allergic rhinitis in the past but outcomes varied. A modified transsphenoidal approach is proposed to simplify endoscopic vidian neurectomy. The postoperative evaluation of rhinorrhea, sneezing, and recurrence was investigated. Methods A total of 317 patients with refractory allergic rhinitis underwent 414 transsphenoidal vidian neurectomies from September 2006 to December 2010. A rigid nasal endoscope was used through a transsphenoidal approach to reach the vidian canal inside the sphenoid sinus (type I) or through its anterior opening into the pterygopalatine fossa (type II) and to cut or cauterize the vidian nerve. The surgical outcomes were analyzed for patients with at least 6 months of follow-up. Results Our approach was successful in 90.3% of the 414 vidian neurectomies. Vidian neurectomy was successful via the type I approach in 27 sides and type II approach in 347 sides. The short-term surgical outcomes of 163 patients who underwent a total of 236 vidian neurectomies with at least 6 months of follow-up were analyzed. Immediate, complete cessation of sneezing and rhinorrhea occurred uniformly. Three recurrences were detected during the 1–2 years of follow-up. The symptom of dry eye was reported for 172 surgical sides, but only 6 had persistent symptoms for > 6 months. Conclusion The transsphenoidal approach in a vidian neurectomy is a simple method that removes the need for sphenopalatine artery ligation and causes less surgical morbidity. However, the possibility of recurrence of this condition in the long term needs further investigation.

scholarly journals The albumin–bilirubin score as a predictor of outcomes in Japanese patients with PBC: an analysis using time-dependent ROC

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Takanori Ito ◽  
Masatoshi Ishigami ◽  
Hikaru Morooka ◽  
Kenta Yamamoto ◽  
Norihiro Imai ◽  
...  
Keyword(s):  
Liver Transplantation ◽  
Roc Analysis ◽  
Japanese Patients ◽  
Hepatic Function ◽  
Time Dependent ◽  
Prognostic Scores ◽  
Primary Biliary Cholangitis ◽  
Simple Method ◽  
Mayo Score

Abstract The albumin–bilirubin (ALBI) score is calculated using only serum albumin and bilirubin levels, and was developed as a simple method to assess hepatic function. In this study, a total of 409 patients with primary biliary cholangitis (PBC) were enrolled between March 1990 and October 2018. The predictive performances of the ALBI score and other well-established prognostic scores were compared using time-dependent receiver operating characteristic (ROC) analysis. During the follow-up period, 60 patients died, 45 due to liver-related diseases and 15 due to non-liver-related diseases, and 16 patients underwent liver transplantation. Time-dependent ROC analysis showed that the ALBI score has higher the areas under the ROC curves (AUROCs) than the Child–Pugh (C–P) score at each time point; AUROCs at 3, 5, and 10 years after the start of follow-up were 0.94, 0.91, and 0.90 for the ALBI score, and 0.89, 0.88, and 0.82 for the C–P score, respectively. The ALBI score showed the highest AUROCs within 2 years after the start of observation; beyond 2 years, however, the Mayo score had better prognostic ability for mortality and liver transplantation. The ALBI score/grade, derived from objective blood tests, and the Mayo score were superior prognostic tools in PBC patients.

scholarly journals Simple Sari Cloth Filtration of Water Is Sustainable and Continues To Protect Villagers from Cholera in Matlab, Bangladesh

mBio ◽  
2010 ◽  
Vol 1 (1) ◽  
Author(s):  
Anwar Huq ◽  
Mohammed Yunus ◽  
Syed Salahuddin Sohel ◽  
Abbas Bhuiya ◽  
Michael Emch ◽  
...  
Keyword(s):  
Field Trial ◽  
Chi Square ◽  
Simple Method ◽  
Filtration Method ◽  
Follow Up Study ◽  
Household Water ◽  
Study Population ◽  
Original Field ◽  
Village Women

ABSTRACTA simple method for filtering water to reduce the incidence of cholera was tested in a field trial in Matlab, Bangladesh, and proved effective. A follow-up study was conducted 5 years later to determine whether the filtration method continued to be employed by villagers and its impact on the incidence of cholera. A total of 7,233 village women collecting water daily for their households in Bangladesh were selected from the same study population of the original field trial for interviewing. Analysis of the data showed that 31% of the women used a filter of which 60% used sari filters for household water. Results showed that sari filtration not only was accepted and sustained by the villagers and benefited them, including their neighbors not filtering water, in reducing the incidence of cholera, the latter being an unexpected benefit.IMPORTANCEA simple method for filtering pond and river water to reduce the incidence of cholera, field tested in Matlab, Bangladesh, proved effective in reducing the incidence of cholera by 48%. A follow-up study conducted 5 years later showed that 31% of the village women continued to filter water for their households, with both an expected and an unexpected benefit that filtration had both a direct and indirect effect in reducing cholera (chi-square statistic of 1,591.94;P= <0.0001). Results of the study showed that the practice of filtration not only was accepted and sustained by the villagers but also benefited those who filtered their water as well as neighbors not filtering water for household use in reducing the incidence of cholera.

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