____________ _ Complement activation induced by latex, polyvinylchloride, and silicone tubings for extracorporeal circulation was studied in 2 in vitro situations: Fresh whole human blood mixed with priming solution was circulated through 1 00 em tubing lengths for 1 hour, and small tubing pieces were incubated in fresh human serum for 7 hours. Activation of C3 and of the terminal pathway (C5-C...

Voltammetric detection of metals in natural waters suffers from interference by dissolved oxygen. We describe here a deoxygenation method suitable for ̄ow analysis with detection by cathodic stripping voltammetry (FIA-CSV). The apparatus is based on the permeation of oxygen through semi-permeable tubing (silicone, Pore ̄on and others) into an oxygen-free chamber. Two methods of oxygen removal ar...

HYPOTHESIS Transdermal sustained-delivery oxygen therapy improves wound healing. DESIGN Experimental study using a well-established rabbit ear model for acute wound healing. SETTING Wound-healing research laboratory in a university center. METHODS Four full-thickness 7-mm punch wounds were created on each ear of young, female New Zealand white rabbits. Treated ears received transdermal su...

Silicone tubing is used in small-diameter long-sized tubes for medical applications, such as urinary catheters. However, bacteria urine adhere to the catheters, forming colonies and biofilms resulting blockages tract infections. Therefore, we have reported a method of AC high-voltage plasma chemical vapor deposition prevent bacterial adhesion by depositing diamond-like carbon (DLC) on lumen sil...

BACKGROUND Septal deviation and inferior turbinate hypertrophy are important contributors to nasal airflow obstruction. In recent years, a closed septoturbinotomy, whereby a speculum is inserted into the nose and the blades are spread, has been shown to centralize the bony septum and outfracture the turbinates in most cases. It is a minimally invasive procedure that frequently corrects bony sep...

Introduction: Since the days of Hippocrates, many modifications have been proposed in endonasal dacrocystorhinostomy (DCR), with the use of new drugs and implants showing variable results. The objective of this study was to analyze whether the use of silicon tubing or mitomycin C administration has an added advantage over conventional endonasal DCR.  Materials and Methods: A randomized controll...

Silicone, which is considered biologically inert, has been used in many different types of medical devices, including tubing; breast, joint and penile implants; artificial heart valves; and intraocular lenses, among others. After a silicone implant is placed, a mild reaction to the foreign body is generally observed, followed by encapsulation (1). Case reports of women with silicone breast impl...

Three normal digital flexor tendon sheaths and the corresponding tissue formed around five silicone rod tendon implants, two silicone rubber mammary prostheses and one polyethylene tubing implant have been examined by light microscopy and by transmission and scanning electron microscopy. No principal difference in morphology was found. The surface facing tendon or implant was almost invariably ...