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A lumbar puncture. The needle is inserted between the lumbar vertebrae and into the spinal canal.
Types of bariatric surgery; A, laparoscopic adjustable gastric banding; B, Roux-en-Y gastric bypass.
Subcutaneous drug administration: (a) cross section of skin showing depth of needle insertion;
Surgical needle shapes: (A) taper point; (B) cutting point.
Vacutainer brand safety lock needle holder.
A needle that drops to near zero when the engine is accelerated rapidly and then rises slightly to ...