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Biomedical subjects

Mike Johnson

Publications and source records attributed to Mike Johnson.

4 recordsLinked to original sources
PubMed2006

A summary of some experimental data on LNG safety.

In a recent paper, Luketa-Hanlin reviewed the information in the public domain related to LNG safety. The purpose of this paper is to supplement that work by providing a summary of the experimental information that Advantica has collected on LNG behaviour over the course of the last 30 years. This summary includes previously unpublished information obtained as a result of a number of collaborative projects. Subjective comments are also made on the status of modelling for each of the topic areas and, in a discussion, views are provided on those areas where there are currently gaps that may have a major impact on evaluating the individual or societal risks associated with LNG operations.

Accidents↗
PubMed2004

Digital video.

The process of digital capture, editing, and archiving video has become an important aspect of documenting arthroscopic surgery. Recording the arthroscopic findings before and after surgery is an essential part of the patient's medical record. The hardware and software has become more reasonable to purchase, but the learning curve to master the software is steep. Digital video is captured at the time of arthroscopy to a hard disk, and written to a CD at the end of the operative procedure. The process of obtaining video of open procedures is more complex. Outside video of the procedure is recorded on digital tape with a digital video camera. The camera must be plugged into a computer to capture the video on the hard disk. Adobe Premiere software is used to edit the video and render the finished video to the hard drive. This finished video is burned onto a CD. We outline the choice of computer hardware and software for the manipulation of digital video. The techniques of backup and archiving the completed projects and files also are outlined. The uses of digital video for education and the formats that can be used in PowerPoint presentations are discussed.

Humans↗
PubMed2003

Anterior occiput-to-axis screw fixation: part I: a case report, description of a new technique, and anatomical feasibility analysis.

STUDY DESIGN: A case report of anterior screw fixation from the axis to the occiput is described, as is the surgical technique. The pertinent anatomy is described with a radiographic assessment of the feasibility, safety, and general applicability of this technique. OBJECTIVES: To describe a novel technique of anterior occipitocervical fixation and the pertinent anatomy. SUMMARY OF BACKGROUND DATA: In unique clinical situations where posterior fixation techniques may not be possible or may have already failed, an anterior screw fixation technique may add stability to further attempts at obtaining a posterior arthrodesis. METHODS: A case report is presented, followed by a detailed description of the surgical technique. Ten normal cervical spines had radiographs and computed tomography scans with reformats reviewed to determine screw entry points, target points, and proposed screw trajectories. Following screw insertion in eight fresh frozen human cadaver spine specimens, dissection verified screw location relative to structures at risk. RESULTS: The ideal entry point is located caudal to the C2 superior facet joint in line with the medial third of the C2 superior facet. The screw is directed 25 degrees posteriorly in the sagittal plane and 15 degrees laterally in the coronal plane. The screw tip is located in the posterolateral third of the occipital condyle. Anatomic variation is considerable and makes this technique inadvisable in up to 20% of cases. Structures at risk include the vertebral artery and the hypoglossal nerve. CONCLUSIONS: This new technique of anterior fixation of the atlas to the occiput is feasible and safe if meticulous surgical planning is performed.

Accidents, Traffic↗