Use of the "S" Quattro dynamic external fixator in the treatment of difficult hand fractures

Thirty-seven patients were treated over a 7-year period using the "S" Quattro dynamic external fixator. There were 30 intra-articular and nine extra-articular fractures. Patients were reviewed at an average of 22.5 months. The average total range of motion for the affected digit at follow-up was 232 degrees for intra-articular and 241 degrees for extra-articular fractures. We believe that this device is a simple, reliable technique in the treatment of these difficult fractures.

Dibutyryl cyclic adenosine monophosphate stimulates the sodium pump in rabbit renal cortical tubules

The elevation in oxygen consumption (QO2) observed following addition of the sodium ionophore nystatin in suspensions of rabbit renal proximal tubules was significantly increased by 1 mM dibutyryl cyclic adenosine monophosphate (db-cAMP). The QO2 after subsequent addition of strophanthidin to block the sodium pump was unaffected by db-cAMP. However, 10 microM forskolin in the presence of 100 microM IBMX had no significant effect on the QO2 observed following addition of either nystatin or strophanthidin. Nevertheless, we can conclude that db-cAMP does stimulate the sodium pump activity independently of sodium transport mechanisms in the rabbit renal proximal tubule.