Vascular Studies for Nonvascular Surgeons

Author(s):  
Ali Rajabi-Estarabadi ◽  
Mahtab Forouzandeh ◽  
Ahmed Kayssi ◽  
Robert S. Kirsner ◽  
Afsaneh Alavi
Keyword(s):  
Author(s):  
Assaf Kadar ◽  
Sorin D. Iordache

Abstract Background Scaphocapitate syndrome is a rare injury where the proximal pole of the capitate rotates 90 to 180 degrees. The proximal pole of the capitate, thought to receive its vascular supply retrograde, is rendered avascular in such cases. However, recent evidence of low rates of avascular necrosis in displaced capitate fractures, and new vascular studies of the capitate, challenge this paradigm. Case Description We report a case of a missed and neglected scaphocapitate syndrome with more than 30 years follow-up. While the patient experienced midcarpal arthritis, the injury had not resulted in capitate proximal pole avascular necrosis as per T1 magnetic resonance imaging studies. Literature Review Missed and chronic cases of scaphocapitate syndrome were reported previously. Successful outcomes were achieved with anatomical reduction in cases without midcarpal arthritis. Salvage procedures or arthroplasty procedures are recommended with the presence of midcarpal arthritis. However, there are no reports of a neglected case with more than 30 years follow-up with preserved vascularity of the proximal pole of the capitate. Clinical Relevance This case illustrates that vascularity of the proximal pole of the capitate can be preserved even in longstanding displaced fractures.


1992 ◽  
Vol 262 (6) ◽  
pp. H1669-H1675 ◽  
Author(s):  
F. W. Sellke ◽  
Y. Kagaya ◽  
R. G. Johnson ◽  
T. Shafique ◽  
F. J. Schoen ◽  
...  

Porcine hearts have relatively few native collateral vessels and lack the propensity to develop normal perfusion to the collateral-dependent myocardium. To examine microvascular responses in the collateral-dependent region, collateral vessels were stimulated in pigs by the Ameroid constrictor technique. After 4–7 wk, isolated microarterial vessels (90–170 microns ID) were studied in a pressurized (40 mmHg), no-flow state. Microvessels from noninstrumented pigs were used as controls for vascular studies. Although myocardium in the collateral-dependent region showed minimal evidence of infarction, percent systolic shortening was reduced at rest and after pacing compared with myocardium in the normally perfused region. Relaxations to the receptor-mediated endothelium-dependent agents ADP and bradykinin were impaired in collateral-dependent coronary microvessels. Relaxations to the calcium ionophore A23187, which acts through a non-receptor-mediated mechanism, were similar in control and Ameroid microvessels. Relaxations to the endothelium-independent agent sodium nitroprusside were markedly enhanced in microvessels from the collateral-dependent region compared with microvessels from control hearts. In conclusion, receptor-mediated endothelium-dependent relaxation is impaired and endothelium-independent relaxation to sodium nitroprusside is enhanced in microvessels from myocardium perfused by immature collateral vessels.


2016 ◽  
Vol 2 (1) ◽  
pp. 31-37
Author(s):  
Daniel A. Wolff ◽  
Gustavo J. Armand Ugón ◽  
Jesús R. Manzani

Introducción: El éxito de éste colgajo depende de la anatomía vascular de su pedículo y de la existencia de anastomosis con pedículos proximales. Los estudios vasculares anatómicos en cadáveres fundan las bases para la realización de colgajos musculares. El cirujano debe conocer cuales de los resultados de un estudio cadavérico son aplicables al paciente. Objetivos: Estudiar en cadáveres el número de pedículos distales, su topografía y la existencia de anastomosis con vasos proximales. Luego comparar estos datos con los hallados en pacientes. Material y Métodos: En 9 piernas cadavéricas se estudió la anatomía de los pedículos distales. En 5 pacientes se realizó colgajo de hemisóleo a pedículo distal y se verificó la correspondencia de los datos cadavéricos con los hallados en el vivo. Resultados: En el grupo cadavérico los pedículos distales para el músculo sóleo se originaron tanto de la arteria tibial posterior como de la peronea. El vaso mas distal se encontró en promedio a 6,32 cm de la línea intermaleolar y su origen mas frecuente fue la arteria tibial posterior. La presencia de anastomosis no fue demostrable en las disecciones cadavéricas pero si en el vivo.       Conclusiones: Los resultados cadavéricos fueron comparables con los hallazgos del modelo vivo, salvo en la identificación de anastomosis, sólo evidenciables en éstos últimos. Esta información es útil para el abordaje y localización del pedículo distal que nutre el colgajo, pero no para definir el territorio anatómico del vaso. Por lo tanto, debe conocerse que datos originados de estudios cadavéricos pueden aplicarse al vivo. Introduction: The success of this flap depends on the vascular anatomy of its pedicle and on the existence of anastomosis with proximal pedicles. The anatomic cadaveric vascular studies set the foundation for muscle flap designs. Surgeons should know which results of cadaveric studies are applicable to the patient. Our objective was to study, in cadavers, the number and situation of distal pedicles to the soleous muscle and the existence of anastomosis between them and proximal dominant vessels for this muscle, and to compare this data with those found in patients. Material and Methods: The anatomy of distal pedicles was studied in nine cadaveric legs. Distally based hemisoleus flap was performed in five patients. The correspondence between cadaveric and patients data was verified. Results: Cadaveric group distal pedicles for soleus muscle were originated from the posterior tibial artery and also from the fibular artery. The most distal vessel was found at an average of 6.32 cm from the intermaleolar line. Its most frequent origin was the posterior tibial artery. The presence of anastomosis was demonstrated in patients but not in cadaveric dissections. Conclusions: Cadaveric results were comparable with those found in patients, except for the identification of the anastomosis. This information is useful for the localization and surgical approach of the distal pedicle that nourish the flap, but not to define the anatomical territory of the vessel. Therefore, it should be known which cadaveric data can be applied to the patients.   


1988 ◽  
Vol 22 (4) ◽  
pp. 343-346 ◽  
Author(s):  
S. R. Milligan ◽  
C. Edwards

Vascular permeability in the uterus and other tissues of mice was assessed using the accumulation of 125I-human serum albumin 30 min after its intravenous injection. The anaesthetic agent employed for the 125I-albumin injection differentially affected the estimates of vascular permeability: intraperitoneal (i.p.) tribromoethanol of pentobarbitone sodium produced significantly higher values for the uterus and body wall than ether. The i.p. administration of either Saffan or pentobarbitone sodium reduced estimates of vascular permeability in the duodenum. These results emphasize the importance of the choosing a suitable anaesthetic agent in vascular studies of the uterus and other abdominal tissues.


2000 ◽  
Vol 04 (04) ◽  
pp. 297-302
Author(s):  
Myung-Sang Moon ◽  
Young-Kyun Woo ◽  
Gong-Sub Yeom

Study design: A study comparing the vasculature of the normal and regenerated menisci in rabbits' knees. Objectives: To observe the patterns of the new vessel growth in the regenerating meniscus from its developmental stage to its maturity. Summary of background data: There have been no comparative vascular studies in the normal and regenerated menisci in animals in spite of the well-known previous vascular studies in normal and degenerated menisci in human. Methods: At 3, 4, 6, 10 and 16 weeks after unilateral total meniscectomy in both knees of 25 immature rabbits, aged 6–8 weeks, radiopague blue dye was injected through the abdominal aorta of five rabbits for vascular study before sacrifice, and then the five rabbits were sacrificed at each observation time. A modified Spalteholz clearing technique was employed, and the menisci were examined and photographed under dissecting microscope with reflected light and transillumination. Results: New vessel growth was observed in the regenerating menisci at three weeks after meniscectomy. The blood supply was present in the outer 30–50% of the regenerated meniscus at six weeks postmeniscectomy and then it slightly regressed. The regenerated menisci were smaller in size as compared with normal ones. The anterior and posterior horns were more vascular than the rest of the regenerated menisci. Conclusion: The regenerated medial and lateral menisci had almost the same vascular patterns as those seen in the normal menisci.


1985 ◽  
Vol 14 (11) ◽  
pp. 1081-1084 ◽  
Author(s):  
Steven C Curry ◽  
James C Kraner ◽  
Donald B Kunkel ◽  
Patricia J Ryan ◽  
Michael V Vance ◽  
...  
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1999 ◽  
Vol 1 (2) ◽  
pp. 57-63 ◽  
Author(s):  
Paola Sandroni ◽  
Mark D.P. Davis ◽  
C. Michel Harper ◽  
Roy S. Rogers ◽  
C. Michel Harper ◽  
...  
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