Ball valve is one of valves that have many applications in industry especially in gas delivery systems. This kind of valve is categorized in the on- off flow control valve. This study aims to investigate unusual application of ball valve to control fluid flow in the oil and gas industry and its destructive effect including erosion of ball and body of valve. Simulation of industrial ball valve i...

a 45- year old man with a history of aortic valve replacement presented with acute chest pain which was diagnosed to be anterior wall myocardial infarction. he received thrombolytic therapy with streptokinase. echocardiography and fluoroscopy showed normally functioning ball and cage aortic prosthesis. coronary arteriography showed globular filling defect in midportion of left anterior descendi...

Respiratory tract obstruction due to a blood clot may result in life threatening ventilatory impairment. Ball valve blood clot obstructions of the airways are rare. A ball valve blood clot acts as a one-way valve, allowing (near) normal air entry into the airways, but (completely) blocking expiration. In a near fatal case of obstruction of the airways by a ball valve blood clot, we performed 'w...

Marked stenosis or incompetence of the aortic valve invariably causes progressive disability and early death. They are best treated by surgery, and since July 1964 the treatment of choice in Bristol has been replacement with the Starr-Edwards ball valve prosthesis. Originally constructed of a silicone rubber ball contained in a Vitallium-like alloy cage, the ball has shown signs of wearing out ...

A 26-year-old man was admitted for follow-up after VSD closure without any symptoms. Echocardiography showed a mobile mass of the tricuspid valve (Fig. 1). The peduncu-lated ball-shaped mass was attached to the anterior leaflet of the tricuspid valve (Fig. 2). Histopathological examination revealed an organized thrombus without any tumor components. Fig. 1. Preoperative transthoracic echocardio...

PURPOSE The Starr-Edwards ball valve was first applied clinically in 1960. In our hospital, this valve has been used since 1963, and some patients have been followed up for 30 years or more. Based on our experience, therapeutic strategies included revalve replacement as a preventive procedure in the absence of valve-related complications. In this study, we investigated whether prophylactic reop...

We report a case of a male patient who received an implantation of a Starr-Edwards-caged-ball-valve-prosthesis in 1967. The surgery and postoperative course were without complications and the patient recovered well after the operation. For the next four decades, the patient remained asymptomatic--no restrictions on his lifestyle and without any complications. In 2006, 39 years after the initial...

The purpose of this report is to review the results of mitral valve replacement since a first report in the Annals of Surgery in 1961, in order to determine the relative importance of new valve designs versus other surgical variables. The continued use of the silastic ball valve in its 1966 configuration (Model 6120), by providing a comparative data base for other new prosthetic valves, allows ...

Left atrial ball valve thrombus is an unusual condition, especially in patients with normal mitral valve. In the present case, we describe a 61-year-old female with restrictive cardiomyopathy who presented with a large left atrial ball valve thrombus, which subsequently embolized to right carotid artery and was treated with intravenous thrombolysis. This case provides useful insight into the ge...

Total mitral valve replacement was first successfully accomplished by Starr and Edwards (1961) using a ball valve prosthesis. We have adopted their method for patients in whom the pathological changes make it impossible to obtain a mobile anterior mitral leaflet due to calcifications or shortened fused chordae tendineae. This paper describes an instrument that holds the ball valve prosthesis in...