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K Q Robert

Publications and source records attributed to K Q Robert.

4 recordsLinked to original sources

Evaluation of the cervical spine in the polytrauma patient.

STUDY DESIGN: Two-part study. Part One: the analysis of surveys distributed to members of the Orthopaedic Trauma Association (OTA) and 1000 surgeon members of NASS. Part Two: a prospective clinical study evaluating a new algorithm to evaluate the cervical spine in polytrauma patients. OBJECTIVES: To determine if there is a consensus of the optimal method for "clearing the cervical spine"; to assess the safety and efficacy of a newly proposed algorithm. SUMMARY OF BACKGROUND DATA: There is no uniformly accepted algorithm for "clearing the cervical spine" in the polytrauma patient or those patients with altered mental status secondary to the influence of alcohol, drugs or a closed head injury. METHODS: All members of the OTA and 1000 surgeon members of NASS were sent questionnaires to assess their methods of "clearing the cervical spine" in the polytrauma patient. Their answers were collated, analyzed and compared to standard ATLS protocol guidelines. A new protocol, which includes a surgeon, controlled stretch test and flouroscopically visualized flexion-extension views, was initiated and evaluated for safety and efficacy. RESULTS SURVEY: Fifty-five percent of the members of the OTA and 31% of the NASS surgeons responded to the questionnaire. Among the responses from the NASS members, the ratio of orthopaedic spine surgeons to neurosurgeons accurately parallels the society's membership (77% ortho, 23% neuro). Sixty-nine of the OTA and 54% of the NASS responders replied that they followed ATLS guidelines. Analysis of their responses showed only 40% compliance. Eighty-one percent of the OTA respondents utilize the standard three view cervical spine trauma series, only 31% of the NASS members adhere to this guideline. Nearly 90% of all respondents identified the presence of neck pain or retropharygeal soft tissue swelling as an indicator to expand their initial radiographic evaluation. There was no consensus as to management of the polytrauma patient with a closed head injury. Eighty-two percent of all respondents has seen or treated a purely ligamentous injury of the c-spine. SPECTIVE STUDY: Prospective clinical protocol. 35-month period: enrolled 153 patients, 12,000 patients seen in trauma unit. Completed data 149/153. 8/153 unable to be cleared due to poor visualization of cervical-thoracic junction. 3/153 positive findings identified during fluoro examination. All three instability patterns verified in surgery (true positives). No untoward events to date. CONCLUSIONS: A standardized protocol to safely and effectively clear the cervical spine has yet to be established. Preliminary results of a new protocol to safely evaluate the cervical spine in the polytrauma patient are promising.

Adult↗

Occult ligamentous injury of the cervical spine.

Evaluating the cervical spine for injury is an essential part of the assessment of a traumatized patient. Clinical examination and radiographs are the traditional techniques used for this evaluation. Often, however, a reliable clinical examination is not possible because of head injury, altered mental status, or "distracting" injuries. In such cases, cervical spine injury that is not apparent on radiographs may be missed. This case report illustrates a purely ligamentous cervical spine injury resulting in cervical instability. We describe our method of screening for and evaluating these types of injuries using physician-controlled stretch, flexion, and extension examination under fluoroscopy.

Adult↗

Cotton dust sampling efficiency of the vertical elutriator.

A theoretical model of the vertical elutriator air sampler based upon the phenomenon of flow separation at the inlet was developed at SRRC. The model's equations were simulated by a computer program (VELUT). The model was calibrated by comparison of available experimental results to isokinetic sampling efficiencies calculated by the model. The calibrated model was used to predict integral efficiencies for a systematic assortment of size distributions of cotton dust. Rather than cutting off cleanly at 15 micrometers, the computer model exhibited a 50% differential efficiency at approximately 20 micrometers. Furthermore, the model predicted substantial non-zero collection efficiencies in the aerodynamic size range of individual cotton fibers. Program VELUT represents an objective method whereby the isokinetic sampling efficiency of the vertical elutriator can be explicitly calculated for any known or postulated ambient dust distribution presented to the sampler at its inlet plane.

Dust↗