Retroperitoneal migration of a self-inflicted ballpoint pen via the urethra.

Self-inflicted orbitocranial injury with a plastic ballpoint pen.

Self-inflicted, trans-optic canal, intracranial penetrating injury with a ballpoint pen.

Trans-orbital penetrating injuries are not common. If not promptly treated, these injuries can lead to serious disabilities and even death. A 60-year-old man, who had multiple underlying diseases, was admitted to our medical ward for the treatment of aspiration pneumonia; he attempted suicide by inserting a ballpoint pen into his left eye. CT of the brain showed a foreign body penetrating throu...

Misalignment Tolerance of Pluggable Ballpoint-Pen Interconnect of Graded-Index Plastic Optical Fiber for 4K/8K UHD Display

We investigate the influence of launching conditions on misalignment tolerance of pluggable ballpoint-pen interconnects, where graded-index plastic optical fibers (GI POFs) are coupled with ball lenses mounted on their end faces. The lateral-misalignment tolerance of the ballpoint-pen connector decreased with an increase in the driving current of a vertical cavity surface emitting laser (VCSEL)...

An electromyographic study of two different types of ballpoint pens--investigation of a one hour writing operation.

Recently there has been an increasing incidence of occupational cervicobrachial disorders (OCD) and writer's cramp in office workers using ballpoint pens in writing operations. For the sake of workers who use ballpoint pens, it is essential to prevent such health hazards. It has been observed that a strong gripping pressure on the ballpoint pen significantly contributes to the development of th...

Penetrating brain injury caused by retained plastic tip of ballpoint pen.

Radiological evaluation was performed using a 64MDCT scanner without any sedation. Multiplanar reformation images clearly revealed a residual foreign body – possibly the tip of the ballpoint pen – in the frontal lobe ( fig. 1 ). Therefore, surgical removal of the foreign body was planned. Bifrontal craniotomy was performed. The orbital roof was found to be fractured, and bone fragments were lod...