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Biomedical subjects

A L Chen

Publications and source records attributed to A L Chen.

20 records · Page 2Linked to original sources

Developing partnerships in Washington State to prevent hepatitis B virus infection in Asian Americans and Pacific Islanders.

PURPOSE: The purpose of this paper is to describe the partnerships and activities of the Washington State Asian and Pacific Islander Task Force on Hepatitis B Immunization to: 1) increase hepatitis B vaccination of older Asian American and Pacific Islander (AAPI) children and 2) prevent hepatitis B virus (HBV) infection in Washington State. METHODS: Multiple strategies were used to increase hepatitis B vaccination rates among AAPI children, including developing a Task Force consisting of members from public and private organizations. Specific strategies included: 1) developing and distributing culturally specific hepatitis B educational materials, 2) supporting a household cluster survey to assess hepatitis B vaccination coverage rates of AAPI children, 3) conducting hepatitis B immunization and blood testing clinics at local Chinese language schools, and 4) conducting outreach through media sources. PRINCIPAL FINDINGS: Hepatitis B vaccination data from two clinics with large numbers of AAPI clients were evaluated for children aged 0 to 19 years. The results suggest that the average number of hepatitis B vaccinations given per month has been increasing between 1995 through March 2001. Although no causal association between vaccination rates and activities of the Task Force can be made, these data suggest that our efforts may have had a positive impact. CONCLUSIONS: Hepatitis B prevention efforts in a high-risk community can be accomplished in partnership with the AAPI community and organizations working with these communities. Collaborations require persistence, patience, flexibility, and creativity to achieve community and public health goals.

Adolescent↗

The effect of distal screw orientation on the intrinsic stability of a tibial intramedullary nail.

To compare the intrinsic stability of two distal interlocking screw orientations for tibial nailing of distal third tibial diaphyseal fractures without isthmal support, six Depuy (Warsaw, Indiana) tibial intramedullary nails were implanted in simulated distal tibiae. The constructs received both two parallel (medial to lateral) and two perpendicular (one medial to lateral, one anterior to posterior) distal interlocking screws in a random order Angular, translational, and torsional displacements of the nails were measured in response to 70 N proximal applications of anterior, posterior, medial, and lateral loads, and a 7.7 Newton-meter torsional load. There were no differences in medial or lateral angulations between the screw orientations (average: 2.5 degrees, p > 0.8). Angulation in the sagittal plane (anterior and posterior) was slightly less for parallel screw fixation (1.6 degrees versus 2.4 degrees), but this was not statistically significant (p > 0.1). Rotational angulation was higher in the parallel (average: 9.9 degrees) versus the perpendicular (average: 8.1 degrees) screw orientation, but these results were not statistically significant (p > 0.1). Pure translation did not occur in either the parallel or perpendicular screw orientations. These results indicate that fixation stability of these tibial intramedullary nails is not significantly influenced by distal interlocking screw orientation in response to sagittal, coronal, or rotational forces.

Bone Nails↗