Exploring Biopharmaceutical Analysis with Compact Capillary Liquid Chromatography Instrumentation.

A recent trend in the design of liquid chromatography (LC) instrumentation is the move towards miniaturized and portable systems. These smaller platforms provide wider flexibility in operation, with the opportunity for conducting analysis directly at the point of sample collection rather than transporting the sample to a centralized laboratory facility. For the manufacturing of pharmaceutical and biopharmaceutical products, these platforms can be implemented for process monitoring and product characterization directly in manufacturing environments.

The effect of the immunoassay curve fitting routine on bias in troponin.

Objectives: Unlike many dose-response curves used in clinical chemistry, the immunoassay curve used to quantitate measurands is often sigmoidal rather than linear. Consequently, a more complex curve fitting model is required. Various models are available, but they can introduce bias, and there can be little awareness of why this error can be introduced.

Vitamin D testing: Impact of changes to testing guidelines on detection of patients at risk of vitamin D deficiency.

Background: Changes were made to the Australian guidelines for vitamin D testing in November 2014 which restricted the patients who could be tested and reimbursed under the Medical Benefits Schedule. A retrospective study was conducted to assess the impact of the changes.

Methods: Data from 588,021 cases tested for vitamin D over the period of 2014 to 2017 were obtained and the results in 149,808 cases tested before the change in guidelines were compared to 438,213 cases tested afterwards.

Diagnosis of Primary Aldosteronism by Seated Saline Suppression Test-Variability Between Immunoassay and HPLC-MS/MS.

Background: In primary aldosteronism (PA), excessive, autonomous secretion of aldosterone is not suppressed by salt loading or fludrocortisone. For seated saline suppression testing (SSST), the recommended diagnostic cutoff 4-hour plasma aldosterone concentration (PAC) measured by high-performance liquid chromatography-mass spectrometry (HPLC-MS/MS is 162 pmol/L. Most diagnostic laboratories, however, use immunoassays to measure PAC.

Sleep reductions associated with illicit opioid use and clinic-hour changes during opioid agonist treatment for opioid dependence: Measurement by electronic diary and actigraphy.

Sleep problems are commonly reported during opioid agonist treatment (OAT) for opioid use disorders. Inpatient studies have found both sleep disturbances and improved sleep during OAT. Illicit opioids can also disrupt sleep, but it is unclear how they affect sleep in outpatients receiving OAT.

Comorbidity burden and nonclinical factors associated with sinonasal cancer all-cause mortality.

Objective: To describe comorbidity burden and nonclinical factors associated with all-cause mortality of sinonasal cancer in the United States.

Methods: The National Cancer Database (2004-2013) was queried for adult cases of sinonasal cancer (n = 10,518). Outcome of interest was all-cause mortality.

Survival differences in nasopharyngeal carcinoma among racial and ethnic minority groups in the United States: A retrospective cohort study.

Objective: The literature on nasopharyngeal carcinoma survival in the United States has focused mostly on Whites or Asians and not much is known about survivorship in other minority racial and ethnic groups. We aimed to determine the disease-specific survival rate and prognostic factors for nasopharyngeal carcinoma survival across the minority United States population.

Design: A retrospective cohort study.

The investigation of interferences in immunoassay.

Immunoassay procedures have a wide application in clinical medicine and as such are used throughout clinical biochemistry laboratories both for urgent and routine testing. Clinicians and laboratory personnel are often presented with immunoassay results which are inconsistent with clinical findings. Without a high index of suspicion interferences will often not be suspected.

Morbidity, mortality and cost from HPV-related oropharyngeal cancer: Impact of 2-, 4- and 9-valent vaccines.

Objective: The incidence of oropharyngeal squamous cell carcinoma (OPSCC) related to human papillomavirus (HPV) is increasing at a dramatic rate, with men affected more commonly than women. Individuals who develop this disease suffer significant morbidity and potential mortality from their cancer and its associated treatment. We aim to evaluate the possible impact that the currently available HPV vaccines will have on this group of cancers.

Harmonised Australian Reference Intervals for Serum PINP and CTX in Adults.

Bone turnover markers (BTMs) are classified as either formation or resorption markers. Their concentrations in blood or urine of adults are considered to reflect the rate of bone remodelling and may be of use in the management of patients with bone disease. Major inter-method differences exist for BTMs, and harmonisation of methods is currently being pursued at an international level.

Longitudinal voice outcomes following laryngeal reinnervation via vagus-to-recurrent laryngeal nerve anastomosis after vagal nerve sacrifice: a case series.

Objective: This study aimed to describe longitudinal voice outcomes of vagus-to-recurrent laryngeal nerve anastomosis following operative vagal nerve sacrifice.

Methods: Two patients who underwent anastomosis were assessed by a multidisciplinary voice team at 1, 4, 9, 12, and 18 months after vagal sacrifice.

Results: Long-term changes in voice function based on auditory perceptual measures of voice quality and visual perceptual changes in glottal closure were observed and maintained for 18 months after vagus-to-recurrent laryngeal nerve anastomosis in 2 patients with proximal vagal nerve sacrifice.

A retrospective study of the safety and efficacy of ERCP in octogenarians.

Background: Pancreatobiliary disease is increased in elderly patients. Because of significant comorbidities, these patients may be at greater risk of developing complications related to endoscopic retrograde cholangiopantreatography (ERCP).

Objective: The purpose of this study was to compare the indications, interventions, and complications of ERCP of octogenarians with nonoctogenarians.

Interferences in immunoassay.

Substances that alter the measurable concentration of the analyte or alter antibody binding can potentially result in immunoassay interference. Interfering, endogenous substances that are natural, polyreactive antibodies or autoantibodies (heterophiles), or human anti-animal antibodies together with other unsuspected binding proteins that are unique to the individual, can interfere with the reaction between analyte and reagent antibodies in immunoassay. Lipaemia, cross-reactivity, and exogenous interferences due to pre-analytical variation, matrix and equipment reaction also affect immunoassay.

Automatic high-dynamic range image generation for dynamic scenes.

Automatic high-dynamic range image generation from low-dynamic range images offers a solution to conventional methods, which require a static scene. The method consists of two modules: a camera-alignment module and a movement detector, which removes the ghosting effects in the HDRI created by moving objects.