Four studies were performed to evaluate the thrombogenicity of different central venous catheter materials. Two of these studies consisted of evaluating the amount of platelet deposition on different catheter materials, firstly in vitro and then in vivo using dogs. In these studies, 51-chromium was used to label the platelets. In the following study, the volume of clot and the degree of fibrin sheath were determined by placing catheters in both arteries and veins of dogs for two to four weeks before removing the vessels and performing a quantitative analysis. For the fourth study, indium labelled platelet deposition with scintillation counting was performed on six dogs in whom catheters had been placed in the femoral and carotid arteries. The vessels in three of these animals were removed 48 hours after imaging was completed to correlate the scintigraphic findings with a quantitative analysis of the clot and fibrin sheath on each catheter. There was a high degree of correlation between all these studies. The most consistently thrombogenic catheter material was polyurethane, and the least thrombogenic catheter material was polyurethane coated with hydromer. Silicone was the next least thrombogenic material examined.
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http://dx.doi.org/10.1111/j.1399-6576.1985.tb02329.x | DOI Listing |
Oral Maxillofac Surg
January 2025
Department of Oral and Maxillofacial Surgery, German Armed Forces Central Hospital, Rübenacherstr. 170, 56072, Koblenz, Germany.
Purpose: This study aims to analyze microvascular reconstruction in Oral and Maxillofacial Surgery (OMFS) in Europe.
Methods: Based on previous studies, a dynamic online questionnaire was developed and subjected to internal and external evaluation. The questionnaire comprised multiple-choice, rating, and open-ended questions, addressing general and specific aspects and the impacts of the COVID-19 pandemic on microvascular reconstruction in OMFS in Europe.
Acta Ophthalmol
January 2025
Preventive Cardiology and Preventive Medicine, Center for Cardiology, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany.
Aims: Childhood cancer is a risk factor for cardiovascular diseases in later life. Retinal examination allows to non-invasively observe the vasculature of an end-organ. We observe alterations in long-term childhood cancer survivors (CCS).
View Article and Find Full Text PDFSurg Pract Sci
March 2024
Surgery Department, Hospital Pedro Hispano, R. de Dr. Eduardo Torres, Matosinhos, Senhora da Hora 4464-513, Portugal.
Background: Totally implantable venous central access devices (TIVADs) can be implanted by open surgery or by direct puncture in the subclavian (ScV), internal jugular (IJV) or cephalic (CephV) veins.
Methods: A retrospective study was conducted in 201 patients. Thirty-day follow-up data was analyzed to compare the outcomes of different techniques and evaluation of risk factors.
Case Rep Surg
January 2025
Division of Vascular Surgery, Department of Surgery, College of Medicine, King Saud University, Riyadh 11322, Saudi Arabia.
Phlebolith is a term that refers to round-shaped calcified thrombi commonly located in the pelvic region. The occurrence of dense, linear calcifications or phlebolith-like formations within the soft tissues of the lower extremities, particularly in the superficial femoral, greater saphenous, or popliteal veins, is rare. This study presents the case of a 73-year-old woman who was being evaluated for postmenopausal bleeding.
View Article and Find Full Text PDFCureus
December 2024
Ophthalmology, Palmetto Retina Center, Columbia, USA.
The purpose of this manuscript is to report a rare case of pediatric central retinal artery occlusion (CRAO) in the setting of atypical hypercoagulable tests. An 11-year-old female presented to the emergency department with painless, visual changes in the left eye. Ophthalmological examination was remarkable for a central area of retinal ischemia and edema with sparing along the distribution of the cilioretinal artery along with a cherry red spot, all of which were consistent with a CRAO.
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