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Biomedical subjects

J Fielden

Publications and source records attributed to J Fielden.

7 recordsLinked to original sources
PubMed2001

Hip fracture incidence in New Zealand, revisited.

AIM: Earlier predictions of the incidence of hip fractures in the older adult population suggested that by 2011 the rate would rise to epidemic proportions. The purpose of this study was to compare the number hip fractures occuring in New Zealand from 1988 to 1999 with the hip fracture rate predicted in 1990 by Rockwood, Horne and Cryer. METHODS: Data on the number of patients admitted to New Zealand hospitals with a diagnosis of fractured neck of femur were obtained, and compared with weighted regression and baseline predictions of Rockwood et al. RESULTS: The numbers of hip fractures for females, from 1988 to 1993, were similar to the number predicted, yet have been significantly lower than stated predictions since 1995. For males, hip fracture numbers since 1995 were less than the weighted regressions predicted (NS). CONCLUSIONS: Numbers of hip fractures since 1995 have been fewer than predicted. Possible reasons for maintaining the rates of hospitalisation due to fractured neck of femur at pre-1995 levels, are discussed.

Accidental Falls↗
PubMed2000

Creating a child abuse policy that reflects an ethic of care.

The primary purpose of child abuse policy is to guide the action of health care providers and so ensure that the fundamental rights of those the policy intended to protect are not compromised. This discussion paper explores the ethical considerations underlying child abuse policy from bioethical and from caring ethical perspectives, both of which are outlined briefly. A process that could be used to create or analyse existing child abuse policy, in relation to underlying ethical considerations, definitions of child abuse, level of health care, resourcing needs and relationship to employment policy is outlined. A hypothetical example of such a policy is used to illustrate elements of this process. Assuming that policy is designed to direct action, it is argued that if child abuse policies were rewritten to reflect an ethic of care the quality and scope of health care provided to children and their families would improve. Consequently, stated government objectives of improving child health services, as well as primary health care aims of achieving equitable, accessible and affordable health care for children in New Zealand would be better facilitated.

Child↗
PubMed1993

Correction of translational motion artifacts in multi-slice spin-echo imaging using self-calibration.

In this paper, we describe a method for detecting and correcting in-plane bulk translational motion in multislice spin-echo imaging using self-calibration and postprocessing. A constant phase encoding offset between slices is used to evenly spread out the low spatial frequency echoes to allow accurate motion detection by self-calibration. Motion detection in both x and y directions is achieved by interchanging the readout and phase encoding directions for the alternate slices. Displacements are determined by cross correlating the modulus of each 1D transformed echo with a reference box car function whose width equals that of the imaged object. In addition, phase errors induced by the velocity in the readout direction are estimated and corrected using the displacement data. The results obtained from knee studies at 0.5 T and 1.5 T show that the artifacts due to translational motions are significantly suppressed upon correction. The method does not require any additional pulses or time, and the data processing can be easily implemented.

Algorithms↗