A NEW MUSCLE CLAMP

A New Eyelid Clamp

A new bronchus clamp.

Bronchus clamps for use in lung resection have never been entirely satisfactory. The very large number of models available make this plain. When lung resection presents no problems almost any model of bronchus clamp is suitable. In a technically difficult situation all have shortcomings. The basic requirements of a bronchus clamp are: 1. It must be easy to pass with the minimum of dissection of...

A new stomach clamp.

An efficient stomach clamp is one which exerts an even and sufficient pressure across the whole width of the stomach without causing undue trauma at any one point. Very few stomach clamps at present obtainable fulfil these conditions satisfactorily because they ate mainly constructed on the ' bow handle ' principle, or are of the crushing type. All clamps of this type necessarily exert most pre...

Voltage-Clamp Studies on Uterine Smooth Muscle

These studies have developed and tested an experimental approach to the study of membrane ionic conductance mechanisms in strips of uterine smooth muscle. The experimental and theoretical basis for applying the double sucrose-gap technique is described along with the limitations of this system. Nonpropagating membrane action potentials were produced in response to depolarizing current pulses un...

Voltage Clamp Experiments in Striated Muscle Fibers

1. Membrane currents during step depolarizations were determined by a method in which three electrodes were inserted near the end of a fibre in the frog's sartorius muscle. The theoretical basis and limitations of the method are discussed.2. Measurements of the membrane capacity (C(M)) and resting resistance (R(M)) derived from the current during a step change in membrane potential are consiste...