scholarly journals A fibrin seal closure technique for prolonged postoperative pharyngocutaneous fistula

2015 ◽  
Vol 25 (1) ◽  
pp. 99-102
Author(s):  
Kenichiro Yabuki ◽  
Daisuke Sano ◽  
Goshi Nishimura ◽  
Hiroshi Hyakusoku ◽  
Yasuhiro Arai ◽  
...  
Author(s):  
Gopu Govindasamy ◽  
Subbiah Shanmugam ◽  
Arul Murugan

<p class="abstract"><strong>Background:</strong> The purpose of this retrospective analysis was to review our single institute based experience with the pharyngocutaneous fistula following total laryngectomy and to determine the impact of pharyngeal closure technique in the development of PCF in our patients.</p><p class="abstract"><strong>Methods:</strong> The medical records of the patients, who underwent total laryngectomy for squamous cell carcinoma of the larynx and hypopharynx in Government Royapettah Hospital, center for oncology between January 2010 and December 2017, were retrospectively reviewed.  </p><p class="abstract"><strong>Results:</strong> 26 patients were included in the study of which 25 were male and 1 was female. Mean age of the patients were 58 years. Horizontal closure was done in 9 patients (35%) and T closure was done in 17 patients (65%). PCF was observed in 1 of 9 patients in horizontal closure. Remaining 17 patients underwent T closure of whom 8 patients developed PCF (p=0.06). Eight out of 18 patients (44%) developed PCF after salvage surgery after radiotherapy failure, Remaining 8 patients underwent primary laryngectomy for advanced stage cancers with cartilage involvement, of whom 1 patient developed PCF (12.5%) (p=0.11). In salvage laryngectomy (n=18), 1 of 6 cases developed PCF in horizontal closure and 7 of 12 cases in T closure technique (p=0.09).</p><p class="abstract"><strong>Conclusions:</strong> The incidence of fistula in our study was 34%. Horizontal closure was associated with decreased incidence of PCF when compared to ‘T’ closure of the defect. Prior radiotherapy had increased incidence of PCF.</p>


2018 ◽  
Vol 46 (3) ◽  
pp. 130-152
Author(s):  
Dennis S. Kelliher

ABSTRACT When performing predictive durability analyses on tires using finite element methods, it is generally recognized that energy release rate (ERR) is the best measure by which to characterize the fatigue behavior of rubber. By addressing actual cracks in a simulation geometry, ERR provides a more appropriate durability criterion than the strain energy density (SED) of geometries without cracks. If determined as a function of crack length and loading history, and augmented with material crack growth properties, ERR allows for a quantitative prediction of fatigue life. Complications arise, however, from extra steps required to implement the calculation of ERR within the analysis process. This article presents an overview and some details of a method to perform such analyses. The method involves a preprocessing step that automates the creation of a ribbon crack within an axisymmetric-geometry finite element model at a predetermined location. After inflating and expanding to three dimensions to fully load the tire against a surface, full ribbon sections of the crack are then incrementally closed through multiple solution steps, finally achieving complete closure. A postprocessing step is developed to determine ERR as a function of crack length from this enforced crack closure technique. This includes an innovative approach to calculating ERR as the crack length approaches zero.


2015 ◽  
Vol 66 (4) ◽  
pp. 262-266
Author(s):  
Hiroko Monobe ◽  
Masato Mochiki ◽  
Katsumi Takizawa ◽  
Kazunari Okada

2020 ◽  
Vol 27 (7) ◽  
pp. S105
Author(s):  
S. Behbehani ◽  
E. Suarez-Salvador ◽  
H. Kosiorek ◽  
J. Yi ◽  
J.F. Magrina

Head & Neck ◽  
2021 ◽  
Author(s):  
Teresa Bernadette Steinbichler ◽  
Dolores Wolfram ◽  
Annette Runge ◽  
Roland Hartl ◽  
Daniel Dejaco ◽  
...  

Cancers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 1474
Author(s):  
Stefan Grasl ◽  
Elisabeth Schmid ◽  
Gregor Heiduschka ◽  
Markus Brunner ◽  
Blažen Marijić ◽  
...  

(1) Objective: To evaluate long-term functional outcome in patients who underwent primary or salvage total laryngectomy (TL), TL with partial (TLPP), or total pharyngectomy (TLTP), and to establish a new scoring system to predict complication rate and long-term functional outcome; (2) Material and Methods: Between 1993 and 2019, 258 patients underwent TL (n = 85), TLPP (n = 101), or TLTP (n = 72). Based on the extent of tumor resection, all patients were stratified to (i) localization I: TL; II: TLPP; III: TLTP and (ii) surgical treatment (A: primary resection; B: salvage surgery). Type and rate of complication and functional outcome, including oral nutrition, G-tube dependence, pharyngeal stenosis, and voice rehabilitation were evaluated in 163 patients with a follow-up ≥ 12 months and absence of recurrent disease; (3) Results: We found 61 IA, 24 IB, 63 IIA, 38 IIB, 37 IIIA, and 35 IIIA patients. Complications and subsequently revision surgeries occurred most frequently in IIIB cases but rarely in IA patients (57.1% vs. 18%; p = 0.001 and 51.4% vs. 14.8%; p = 0.002), respectively. Pharyngocutaneous fistula (PCF) was the most common complication (33%), although it did not significantly differ among cohorts (p = 0.345). Pharyngeal stenosis was found in 27% of cases, with the highest incidence in IIIA (45.5%) and IIIB (72.7%) patients (p < 0.001). Most (91.1%) IA patients achieved complete oral nutrition compared to only 41.7% in class IIIB patients (p < 0.001). Absence of PCF (odds ratio (OR) 3.29; p = 0.003), presence of complications (OR 3.47; p = 0.004), and no need for pharyngeal reconstruction (OR 4.44; p = 0.042) represented independent favorable factors for oral nutrition. Verbal communication was achieved in 69.3% of patients and was accomplished by the insertion of voice prosthesis in 37.4%. Acquisition of esophageal speech was reached in 31.9% of cases. Based on these data, we stratified patients regarding the extent of surgery and previous treatment into subgroups reflecting risk profiles and expectable functional outcome; (4) Conclusions: The extent of resection accompanied by the need for reconstruction and salvage surgery both carry a higher risk of complications and subsequently worse functional outcome. Both factors are reflected in our classification system that can be helpful to better predict patients’ functional outcome.


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