False positive radiographical evidence of pump catheter migration into the spinal cord.

Intrathecal drug delivery systems are becoming an increasingly common modality used by physicians to treat patients. Specifically, chronic spasticity secondary to multiple sclerosis (MS) may be treated with intrathecal baclofen (ITB) therapy when oral antispasmodics do not provide adequate relief. ITB therapy is effective, localizes drug delivery, and does not have the same degree of intolerable systemic effects often seen with oral and parenteral medications.

Ultrasound-guided needle EMG of the diaphragm: technique description and case report.

We describe an ultrasound (US)-guided technique for needle examination of the diaphragm and report a case in which the adjuvant use of diagnostic US in conjunction with electrophysiologic studies provided additional information regarding the motion of the diaphragm in a patient who was a potential candidate for phrenic nerve pacing. US imaging provides excellent direct and real-time visualization of soft tissue, anatomic landmarks, fascial planes, and neurovascular structures. It thereby enhances safety by avoiding accidental needle puncture of vital organs, and it also increases the diagnostic utility of the needle examination.

Myonuclear addition to uninjured laryngeal myofibers in adult rabbits.

Objectives: In normal mature limb skeletal muscle, satellite cells are quiescent and myonuclei do not divide after formation of their associated myofibers in the absence of injury. The possibility of myonuclear addition in uninjured laryngeal myofibers of adult rabbits was investigated in an immunohistochemical pilot study.

Methods: Bromodeoxyuridine (brdU), a marker for cell division, was administered by intraperitoneal injection over a 12-hour period in rabbits.