A retrospective evaluation of multiple definitions for ventilator associated pneumonia (VAP) diagnosis in an Australian regional intensive care unit.

BACKGROUND: Ventilator Associated Pneumonia is a common complication of invasively ventilated patients with significant and underestimated morbidity and mortality. Defining VAP cases is greatly varied as many definitions are used with varying success and sensitivity. This study evaluates VAP detection using four definitions in a regional Australian Intensive Care Unit (ICU). METHODS: A cohort of patients admitted to ICU at the Mackay Base Hospital from April 1st 2020 to March 31st 2021, who had endo-tracheal intubation and mechanical ventilation for longer than 48 h were identified. Each patient was examined across four common definitions of VAP. Head-to-head analysis of definitions was pursued to determine the most suitable definition. The four definitions used included: An Australian VAP definition, the CDC VAP definition, the Mackay Base Hospital Local Protocol and a Physician Decision Arm. RESULTS: 66 unique patients and 2 re-intubations were identified during the data collection window. The local protocol identified 8 cases of VAP. The Australian VAP definition identified 6 additional cases and 0 missed cases compared to the local protocol. The CDC definition missed 4 cases and identified 4 additional cases compared to the local protocol. Finally, the physician arm identified 10 cases including 8 additional cases and missed 6 cases. CONCLUSIONS: VAP is an extremely difficult clinical condition to define and detect. Definitions have varied accuracy and suffer logistically for application to the individual patient. Refined criteria for diagnosis of VAP is greatly needed and its prevalence in intensive care units likely remains uncertain.

GL2 EXPRESSION MODULATOR, a plant specific protein phosphatase one interactor that binds phosphoinositides.

Protein phosphatase one (PP1) is a major eukaryotic serine/threonine protein phosphatase whose activity is controlled by targeting or regulatory subunits. Currently, very few plant protein phosphatase one regulatory subunits are known. Here, Arabidopsis GL2 EXPRESSION MODULATOR (GEM) was identified and confirmed as a protein phosphatase one binding partner. GEM is a phosphoprotein, contains a highly conserved phosphoinositide binding GRAM domain and a classic protein phosphatase one binding RVXF motif. Lipid overlays show GEM has the ability to interact with phosphoinositides through its GRAM domain. GEM is the first plant specific protein phosphatase one interactor to be discovered.

Factors influencing physician risk estimates for acute cardiac events in emergency patients with suspected acute coronary syndrome.

BACKGROUND: Emergency physicians frequently assess risk of acute cardiac events (ACEs) in patients with undifferentiated chest pain. Such estimates have been shown to have moderate to high sensitivity for ACE but are conservative. Little is known about the factors implicitly used by physicians to determine the pretest probability of risk. This study sought to identify the accuracy of physician risk estimates for ACE in patients presenting to the ED with chest pain and to identify the demographic and clinical information emergency physicians use in their determination of patient risk. METHODS: This study used data from two prospective studies of consenting adult patients presenting to the ED with symptoms of possible acute coronary syndrome. ED physicians estimated the pretest probability of ACE. Multiple linear regression analysis was used to identify predictors of physician risk estimates. Logistic regression was used to determine whether there was a correlation between physicians' estimated risk and ACE. RESULTS: Increasing age, male sex, abnormal ECG features, heavy/crushing chest pain and risk factors were correlated with physician risk estimates. Physician risk estimates were consistently found to be higher than the expected proportion of ACE from the sampled population. CONCLUSION: Physicians systematically overestimate ACE risk. A range of factors are associated with physician risk estimates. These include factors strongly predictive of ACE, such as age and ECG characteristics. They also include other factors that have been shown to be unreliable predictors of ACE in an ED setting, such as typicality of pain and risk factors.

General practitioners' considerations when deciding whether to initiate end-of-life conversations: a qualitative study.

BACKGROUND: End-of-life discussions often are not initiated until close to death, even in the presence of life-limiting illness or frailty. Previous research shows that doctors may not explicitly verbalize approaching end-of-life in the foreseeable future, despite shifting their focus to comfort care. This may limit patients' opportunity to receive information and plan for the future. General Practitioners (GPs) have a key role in caring for increasing numbers of patients approaching end-of-life. OBJECTIVE: To explore GPs' thought processes when deciding whether to initiate end-of-life discussions. METHODS: A qualitative approach was used. We purposively recruited 15 GPs or GP trainees from South-East Queensland, Australia, and each participated in a semi-structured interview. Transcripts were analyzed using inductive thematic analysis. RESULTS: Australian GPs believe they have a responsibility to initiate end-of-life conversations, and identify several triggers to do so. Some also describe caution in raising this sensitive topic, related to patient, family, cultural and personal factors. CONCLUSIONS: These findings enable the development of approaches to support GPs to initiate end-of-life discussions that are cognizant both of GPs' sense of responsibility for these discussions, and factors that may contribute to caution initiating them, such as anticipated patient response, cultural considerations, societal taboos, family dynamics and personal challenges to doctors.

General practitioners' practical approach to initiating end-of-life conversations: a qualitative study.

BACKGROUND: As doctors who provide care across the life-course, general practitioners (GPs) play a key role in initiating timely end-of-life discussions. Nonetheless, these discussions are often not initiated until close to death. Given the ageing of the population, GPs will be confronted with end-of-life care more often, and this needs to become a core skill for all GPs. OBJECTIVE: To describe GPs' approach to initiating end-of-life discussions. METHODS: Fifteen GPs or GP trainees from South-East Queensland, Australia, were purposively recruited to participate in a semi-structured interview. We analysed transcripts using a thematic analysis. RESULTS: GPs' approach to initiating end-of-life discussions was summarized by four themes: (1) Preparing the ground; (2) finding an entry point; (3) tailoring communication and (4) involving the family. CONCLUSIONS: Emphasis on the doctor-patient relationship; assessing patient readiness for end-of-life discussions; and sensitive information delivery is consistent with factors previously reported to be important to both GPs and patients in this context. Our findings provide a framework for GPs initiating end-of-life discussions, which must be tailored to patient and GP personality factors. Further research is required to evaluate its outcomes.

Activation of Mitochondrial Protein Phosphatase SLP2 by MIA40 Regulates Seed Germination.

Reversible protein phosphorylation catalyzed by protein kinases and phosphatases represents the most prolific and well-characterized posttranslational modification known. Here, we demonstrate that Arabidopsis (Arabidopsis thaliana) Shewanella-like protein phosphatase 2 (AtSLP2) is a bona fide Ser/Thr protein phosphatase that is targeted to the mitochondrial intermembrane space (IMS) where it interacts with the mitochondrial oxidoreductase import and assembly protein 40 (AtMIA40), forming a protein complex. Interaction with AtMIA40 is necessary for the phosphatase activity of AtSLP2 and is dependent on the formation of disulfide bridges on AtSLP2. Furthermore, by utilizing atslp2 null mutant, AtSLP2 complemented and AtSLP2 overexpressing plants, we identify a function for the AtSLP2-AtMIA40 complex in negatively regulating gibberellic acid-related processes during seed germination. Results presented here characterize a mitochondrial IMS-localized protein phosphatase identified in photosynthetic eukaryotes as well as a protein phosphatase target of the highly conserved eukaryotic MIA40 IMS oxidoreductase.