Management of Radiation-Induced Complete Esophageal Obstruction with a Concurrent Antegrade-Retrograde Endoscopic Rendezvous Technique

2005 ◽  
Vol 100 ◽  
pp. S223-S224
Author(s):  
John T. Maple ◽  
Bret T. Petersen ◽  
Todd H. Baron ◽  
Jan L. Kasperbauer ◽  
Mark V. Larson ◽  
...  
Keyword(s):  
Esophageal Obstruction ◽  
Rendezvous Technique ◽  
Radiation Induced

Endoscopic management of radiation-induced complete upper esophageal obstruction with an antegrade-retrograde rendezvous technique

2006 ◽  
Vol 64 (5) ◽  
pp. 822-828 ◽  
Author(s):  
John T. Maple ◽  
Bret T. Petersen ◽  
Todd H. Baron ◽  
Jan L. Kasperbauer ◽  
Louis M. Wong Kee Song ◽  
...  
Keyword(s):  
Endoscopic Management ◽  
Esophageal Obstruction ◽  
Rendezvous Technique ◽  
Radiation Induced

Anterograde–retrograde rendezvous approach for radiation-induced complete upper oesophageal sphincter stenosis: case report and literature review

2011 ◽  
Vol 125 (7) ◽  
pp. 761-764 ◽  
Author(s):  
M P Kos ◽  
E F David ◽  
H F Mahieu
Keyword(s):  
Case Report ◽  
High Risk ◽  
Normal Diet ◽  
Complete Obstruction ◽  
Endoscopic Gastrostomy ◽  
Rendezvous Technique ◽  
Upper Oesophageal Sphincter ◽  
Radiation Induced ◽  
Safe Technique ◽  
Primary Radiotherapy

AbstractBackground:Strictures of the hypopharynx and oesophagus are frequently observed following (chemo)radiation. Anterograde dilatation of a complete stenosis carries a high risk of perforation. An alternative is described: a combined anterograde–retrograde approach.Case report:A 75-year-old man developed complete stenosis of the oesophageal inlet after primary radiotherapy for laryngeal carcinoma and full percutaneous endoscopic gastrostomy feeding. To prevent creation of a false route into the mediastinum, a dilatation wire was introduced in a retrograde fashion into the oesophagus, through the gastrostomy opening. The wire was endoscopically identified from the proximal side and then passed through a perforation created by CO2 laser. Anterograde dilatation was safely performed, and the patient returned to a normal diet. There is consensus in the literature that blind anterograde dilatation carries a high risk of perforation; therefore, an anterograde–retrograde rendezvous technique is advisable.Conclusion:In cases of complete obstruction of the oesophageal inlet, anterograde–retrograde dilatation represents a safe technique with which to restore enteric continuity.

scholarly journals Endoscopic Reconstruction of an Oral Feeding Route Using a Rendezvous Approach

2021 ◽  
pp. 1-6
Author(s):  
Sara Teles de Campos ◽  
Ricardo Rio-Tinto ◽  
Paulo Fidalgo ◽  
Miguel Bispo ◽  
Susana Marques ◽  
...  
Keyword(s):  
Balloon Dilation ◽  
Oral Feeding ◽  
Clinical Settings ◽  
Esophageal Obstruction ◽  
Case Presentation ◽  
Surgical Closure ◽  
Esophageal Lumen ◽  
Rendezvous Technique ◽  
Successful Case ◽  
Endoscopic Reconstruction

<b><i>Background:</i></b> The approach to esophageal obstruction or discontinuity remains challenging and often involves complex reconstructive surgeries. The rendezvous endoscopic technique might be interesting in cases of complete esophageal obstruction. <b><i>Case Presentation:</i></b> Herein we describe a successful case of endoscopic recanalization of the esophageal lumen in a patient with a long-standing esophageal discontinuity resulting from several surgeries and chemoradiation for a squamous cell carcinoma of the hypopharynx, ending in a major cervical amputation, construction of a neopharynx, and definitive surgical closure of the superior esophagus with a PEG placement. With a rendezvous technique (peroral and through the gastrostomy) and under radiographic guidance, puncture from the neopharynx into the distal esophagus was performed, followed by balloon dilation and covered metal stent placement in order to reconstruct a neoesophagus. Five weeks later, the stent was removed (using a stent-in-stent technique). No complications occurred. The patient has been able to eat soft food and is being kept under regular endoscopic surveillance to control/treat a luminal stenosis of the neoesophagus. <b><i>Conclusions:</i></b> This case report illustrates a successful endoscopic treatment of post-surgical complete esophageal obstruction. This approach should be considered in the therapeutic armamentarium of these difficult clinical settings.

Functional outcome of patients treated for radiation-induced complete esophageal obstruction after successful endoscopic recanalization (with video)

2014 ◽  
Vol 80 (1) ◽  
pp. 175-181 ◽  
Author(s):  
Karina V. Grooteman ◽  
Louis M. Wong Kee Song ◽  
Frank P. Vleggaar ◽  
Peter D. Siersema ◽  
Todd H. Baron
Keyword(s):  
Functional Outcome ◽  
Esophageal Obstruction ◽  
Radiation Induced

Radiation-Induced Precipitation at Thin Foil Surfaces in Ni-Be Alloys

1982 ◽  
Vol 40 ◽  
pp. 598-599
Author(s):  
T. Mukai ◽  
T. E. Mitchell
Keyword(s):  
Electron Microscopy ◽  
High Voltage ◽  
Electron Irradiation ◽  
High Vacuum ◽  
Thin Foil ◽  
Homogeneous Precipitation ◽  
High Voltage Electron Microscopy ◽  
Voltage Electron ◽  
High Voltage Electron ◽  
Radiation Induced

Radiation-induced homogeneous precipitation in Ni-Be alloys was recently observed by high voltage electron microscopy. A coupling of interstitial flux with solute Be atoms is responsible for the precipitation. The present investigation further shows that precipitation is also induced at thin foil surfaces by electron irradiation under a high vacuum.

Annealing Of Radiation Damage in Tungsten

1970 ◽  
Vol 28 ◽  
pp. 412-413
Author(s):  
Robert C. Rau ◽  
John Moteff
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Radiation Damage ◽  
Thermal Annealing ◽  
Neutron Fluence ◽  
Dislocation Loops ◽  
Defect Clusters ◽  
Polycrystalline Tungsten ◽  
Transmission Electron ◽  
Radiation Induced

Transmission electron microscopy has been used to study the thermal annealing of radiation induced defect clusters in polycrystalline tungsten. Specimens were taken from cylindrical tensile bars which had been irradiated to a fast (E > 1 MeV) neutron fluence of 4.2 × 1019 n/cm2 at 70°C, annealed for one hour at various temperatures in argon, and tensile tested at 240°C in helium. Foils from both the unstressed button heads and the reduced areas near the fracture were examined.Figure 1 shows typical microstructures in button head foils. In the unannealed condition, Fig. 1(a), a dispersion of fine dot clusters was present. Annealing at 435°C, Fig. 1(b), produced an apparent slight decrease in cluster concentration, but annealing at 740°C, Fig. 1(C), resulted in a noticeable densification of the clusters. Finally, annealing at 900°C and 1040°C, Figs. 1(d) and (e), caused a definite decrease in cluster concentration and led to the formation of resolvable dislocation loops.

Radiation-induced surface decomposition

1983 ◽  
Vol 41 ◽  
pp. 368-369
Author(s):  
M. L. Knotek
Keyword(s):  
Ionizing Radiation ◽  
Atomic Structure ◽  
Chemical Bonding ◽  
Neutral Species ◽  
Radiation Induced ◽  
Physical And Chemical ◽  
Surface Decomposition ◽  
The Relationship ◽  
Electron And Photon ◽  
Surface Bond

Modern surface analysis is based largely upon the use of ionizing radiation to probe the electronic and atomic structure of the surfaces physical and chemical makeup. In many of these studies the ionizing radiation used as the primary probe is found to induce changes in the structure and makeup of the surface, especially when electrons are employed. A number of techniques employ the phenomenon of radiation induced desorption as a means of probing the nature of the surface bond. These include Electron- and Photon-Stimulated Desorption (ESD and PSD) which measure desorbed ionic and neutral species as they leave the surface after the surface has been excited by some incident ionizing particle. There has recently been a great deal of activity in determining the relationship between the nature of chemical bonding and its susceptibility to radiation damage.

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