Related Experiment Video
Updated: Feb 23, 2026

Fabrication of an Expandable Brain Matrix Customizable Across Developmental Stages
Published on: February 20, 2026
If I had a hammer
M Tarazi1, N Mayooran1, J Hinchion1
1Cardiothoracic Surgery, Cork University Hospital, Ireland.
Abstract:
We present the case of a 64-year-old man who was referred to our service after sustaining a self-inflicted nail-gun injury to his chest. He received three nails penetrated into his chest. Computer tomography revealed no massive haemorrhage or damage to major vessels. He underwent an emergency sternotomy, two nails caused pericardial perforation and myocardial injury were noted easily and removed easily via sternotomy. Myocardial injury showed a trajectory near the junction of the left anterior descending artery and the diagonal artery with no significant bleeding appreciated. The third nail was deep in the lung parenchyma at the hilum. A pacemaker magnet was used to locate the third nail, which was subsequently removed. Our case demonstrates the use of magnets in emergency surgery, to locate and remove metallic foreign bodies.
Related Concept Videos
Moment of a Force: Problem Solving
Brick Cutting Techniques
Cut bricks are categorized by size. Bricks cut to half their original length are called half-bats, while those cut to three-fourths their length are known as three-fourth bats.
Special types of...
Machines: Problem Solving I
The toggle clamp system is a machine structure consisting of movable, pin-connected multi-force members that form a stabilized system to transmit forces. The...
Self-Locking Screw
A square-threaded screw jack carrying a load is considered self-locking if the screw retains its position even after the moment applied to it is removed.
Machines
A free-body diagram of the...
Composite Bodies
Composite bodies have widespread applications in mechanical engineering, from automobiles to aircraft to rockets. For example, an automobile wheel comprises...

