Critical structures in the needle path of the costoclavicular brachial plexus block: a cadaver study.

Purpose: The costoclavicular block is a relatively novel alternative to the infraclavicular block. We aimed to determine the anatomical structures vulnerable to needle injury during a costoclavicular block.

Methods: The needle path consistent with a costoclavicular block approach was performed bilaterally on four lightly embalmed cadavers using ultrasound guidance.

The relationship between nicotine cessation and mental disorders in a nationally representative sample.

The objective of this study was to examine the relationship between Axis I and II mental disorders, quality of life, and nicotine dependence cessation in a nationally representative sample. Data came from Wave 2 of the National Epidemiologic Survey on Alcohol and Related Conditions (NESARC), a nationally representative survey of adults in the United States (N = 34,653). People who met DSM-IV criteria for nicotine dependence previously but who had abstained from nicotine in the last year (nicotine cessation) were compared to people currently dependent on nicotine as well as lifetime abstainers using multivariate logistic regression.