Vagal influence during worry and cognitive challenge.

The primary foci of the study were exploration of the linkage between cognitive and autonomic inflexibility of worry and generalized anxiety disorder (GAD) and examination of the effects of an analog cognitive restructuring task on this relationship. Cardiac responses of GAD and non-GAD participants were measured to examine the sympathetic and parasympathetic effects of worry and cognitive challenge. Diagnostic groups of undergraduate students were determined via administration of a structured interview, yielding a GAD group (n=16) and a control group (n=19) of individuals without GAD, depression, or panic disorder diagnoses.

Metal hypersensitivity: can it mimic infection?

Metal hypersensitivity leading onto hardware rejection is reported as a rare phenomenon. If not suspected, it can be a harrowing experience for the patient because it can lead to a seemingly never-ending cycle of tests and procedures. This case highlights the fact that although metal hypersensitivity is rare, it should be included in the differential once infection has been excluded.

Yearly incidence of unicompartmental knee arthroplasty in the United States.

Our purpose was to estimate the incidence of unicompartmental knee arthroplasty in the United States. Three major implant manufacturers provided data over an 8-year period from 1998 to 2005. In addition, a database from 44 hospitals was used to derive national estimates for implants manufactured by all other companies.