Swan-necked, angled, and grooved forceps.

Swan-necked, angled, and grooved forceps.

THE purpose of this paper is mainly to describe swan-necked grooved forceps which have been constantly in use for about 6 years in suturing cataract sections, corneal grafts, corneal wounds, scleral flaps, and also mucosal flaps in dacryocystorhinostomy. Angled, blocked suture-tying forceps are also described and illustrated. Fig. 1 shows the general pattern of the forceps. The handles are thos...

Comparative Analysis of Helically Grooved and Circumferentially Grooved Labyrinth Seal

Labyrinth seals are used in turbo-machinery for reducing the leakage of working fluid. The energy lost by the fluid passing through the gap between labyrinth seal and rotor causes the reduction in leakage rate. But the fluid in between the labyrinth seal and rotor induce various forces (radial and tangential forces). These forces can be represented by certain numbers of coefficients, such as st...

Willett's Forceps

Willett (1925) first published his account of the treatment of placenta praevia byscalp forceps and weight traction, in 1925. He describes the treatment of seven cases by means of a modification of de Martell's surgical scalp forceps?the modification being the increase in length of the handles to inches. His two resident medical officers assured him that they found the method both easy and quic...

Missing Forceps

Patterning flows using grooved surfaces.

Through a simple analytical description we quantify how pressure-driven flows over grooved surfaces develop transverse components, which, for shallow grooves, can be modeled with simple anisotropic effective boundary conditions. Helical recirculation results in channels or capillaries with grooved walls. An experimental validation of our model is presented. Our analysis provides a workable guid...