90 research outputs found

    Application of Statistical Shape Modeling to Predict Clinical Metric of Femoral Head Coverage in Patients with Developmental Dysplasia

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    Developmental dysplasia of the hip (DDH) is described as under-coverage of the femoral head by the acetabulum, resulting in mechanical instability. Though DDH is often diagnosed using plain film radiographs, these images cannot adequately capture 3D joint coverage. Herein, we applied a 3D statistical shape model (SSM) to the femur and hemi-pelvis of patients with DDH to objectively measure shape variation and evaluated whether SSM outputs could predict measurements of joint coverage. The femur and hemi-pelvis were semi-automatically segmented from CT images (83 hips from 47 females with DDH). Surfaces of each hip were reconstructed from segmentations, aligned, and input into a multi-domain SSM (shapeworks.sci.utah.edu). Correspondence particles were automatically placed over the bone surfaces and a subset on the femoral head and acetabulum were isolated for a joint-specific model. Modes of shape variation were determined with principal component analysis (PCA). A sparse model of PCA modes predicting coverage was determined using linear regression with Lasso regularization. Coverage measurements ranged from 27.3% to 39.4%. Eight and 13 modes were selected for the full bone and joint-specific models, respectively. These modes represented 6.1% and 39.6% of the overall shape variation for full bone and joint-specific models with mean prediction errors of 0.9% and 0.6% coverage, respectively (Figure 1). Selected modes represented the depth of the acetabulum and oblateness of the femoral head, aligning well with the clinical description of DDH. In addition, the full bone model captured morphological and pose-related differences potentially related to altered muscle paths or differences in femoral torsion

    Women's experience of intrapartum transfer from a Western Australian birth centre co-located to a tertiary maternity hospital

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    © 2016 Kuliukas et al. Background: The aim of this Western Australian study was to describe the overall labour and birth experience of women who were transferred during the first and second stages of labour from a low risk woman-centred, midwifery-led birth centre to a co-located tertiary maternity referral hospital. Methods: Using a descriptive phenomenological design, fifteen women were interviewed up to 8weeks post birth (July to October, 2013) to explore their experience of the intrapartum transfer. Giorgi's method of analysis was used. Results: The following themes and subthemes emerged: 1) The midwife's voice with subthemes, a) The calming effect and b) Speaking up on my behalf; 2) In the zone with subthemes, a) Hanging in there and b) Post birth rationalizing; 3) Best of both worlds with subthemes a) The feeling of relief on transfer to tertiary birth suite and b) Returning back to the comfort and familiarity of the birth centre; 4) Lost sense of self; and 5) Lost birth dream with subthemes a) Narrowing of options and b) Feeling of panic. Women found the midwife's voice guided them through the transfer experience and were appreciative of continuity of care. There was a sense of disruption to expectations and disappointment in not achieving the labour and birth they had anticipated. There was however appreciation that the referral facility was nearby and experts were close at hand. The focus of care altered from woman to fetus, making women feel diminished. Women were glad to return to the familiar birth centre after the birth with the opportunity to talk through and fully understand their labour journey which helped them contextualise the transfer as one part of the whole experience. Conclusions: Findings can inform midwives of the value of a continuity of care model within a birth centre, allowing women both familiarity and peace of mind. Maternity care providers should ensure that the woman remains the focus of care after transfer and understand the significance of effective communication to ensure women are included in all care discussions

    THE ORGANIC NATURE OF ATMOSPHERIC CONDENSATION NUCLEI

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    Indonesia-China Relations: The Politics of Reengagement

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    Registration of ‘VA‐C 92R’ Peanut

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