Dose of dialysis in the intensive care unit: is the venom in the dose or in the clinical experience?

Many studies on the most 'adequate' dose of renal replacement therapy (RRT) in critically ill patients with acute kidney injury have obtained contradictory results. The previous issue of Critical Care reports a multi-centre study showing that a higher than conventional dose of RRT, whether continuous RRT or intermittent RRT, is not associated with better survival of these patients. This commentary highlights some of the problems associated with the interpretation of this and previously published studies. These problems include the use of targets of Kt/V urea or the ultrafiltration rate in millilitres per kilogram body weight, the latter quite difficult to estimate in these patients, the divergent co-morbidities of the patients, and the local experience of intensivists or nephrologists with either continuous RRT or intermittent RRT. The last factor could explain why some single centre studies did find an impact of dialysis dose on the survival of these patients whereas multi-centre studies did not.     

Does the orientation of the distal radioulnar joint influence the force in the joint and the tension in the interosseous membrane?

OBJECTIVE: To investigate the effect of change in the orientation of the distal radioulnar joint on the force in the joint and the strain in the interosseous membrane. DESIGN: Biomechanical study in fresh frozen cadavers. BACKGROUND: The articular surfaces of the distal radioulnar joint may be orientated in parallel with the long axis of the forearm (a Type I joint) or at an oblique angle opening distally to the ulnar side (a Type II joint). METHODS: Three cadaveric upper limbs were held on a custom built frame allowing measured rotation and axial loading across the wrist. Measurements of force in the distal radioulnar joint and strain in the interosseous membrane were taken and repeated after replacement of the distal radioulnar joint with prosthetic Type I and Type II joints. FINDINGS: The force in the joint and the strain in the interosseous membrane increased with increasing load across the wrist (P < 0.0001). The force in the Type I joint was reduced compared to the normal or Type II joint. This difference was greater with increasing load and was significant at 8 kg (P < 0.001). The strain in the interosseous membrane was maximal at neutral forearm rotation and decreased with increasing pronation and supination. INTERPRETATION: The force in the joint is greater with the Type II distal radioulnar joint. We believe this compressive force increases joint stability and this orientation of the articular surfaces should be considered in the design of a total distal radioulnar joint arthroplasty.     

Pneumonia in the elderly--what makes the difference?

Pneumonia has a particularly high incidence in the elderly, the cardinal risk factors being comorbidity and malnutrition. The independent bearing of age on the aetiology of pneumonia is a matter of controversy and is probably limited. Streptococcus pneumoniae is uniformly the most frequent pathogen. Elderly patients with pneumonia are frequently oligosymptomatic. Quite often, mental confusion may be the only clinical symptom. Physical and chest radiograph examination have specific and important pitfalls. Mental confusion as a surrogate marker of severe sepsis should be added to the criteria for assessing the severity of disease. Pneumonia in the elderly is associated with a considerably increased mortality, but age does not appear to be an independent predictor of death. The disease continues to be the old man's friend: survivors of a pneumonia episode are more likely to die during follow-up as compared to controls. Antimicrobial treatment in the elderly should follow a risk-adopted approach. When selecting antimicrobial agents for the treatment of the elderly, peculiarities in pharmacokinetics, drug interactions and side effects should be considered. The rate of radiographic clearance is inversely correlated with age. All elderly individuals are candidates for vaccination against pneumococci and influenza, particularly in the presence of cardiopulmonary comorbidity and any degree of immunosuppression.     

Cortical dysbalance in the brain in migraineurs--hyperexcitability as the result of sensitisation?

A cortical dysbalance has a pivotal role in the pathophysiology of migraine. Numerous electrophysiological and transcranial magnetic stimulation (TMS) studies have investigated the interictal excitability level in migraineurs and have shown a consistent lack of habituation during repetitive stimulation. There is some controversy in the current literature over whether this deficit is based on a lowered or an elevated preactivation level. However, the current discussion may be misguided. It seems that multiple external and intrinsic factors influence the level of cortical excitability and the frequency and intensity of attacks: Habituation is specific neither to migraine nor even to pain; the same phenomenon is found in tinnitus patients, for example. Cortical hyperexcitability is presumably the result of chronicity and the concomitant central sensitisation process.     

The truth is in the eye of the beholder? Quality in rehabilitation from the patients' perspective

The definition of "good" quality in health research and quality management in health care and rehabilitation are primarily based on health professionals and their associations. But laypersons, patients, and participants in rehabilitation programmes, too, develop cognitive concepts about what defines good quality in health care. Until now systematic knowledge about the role of the patients' views on quality in rehabilitation is rare. Existing data demonstrate that patients report detailed ideas about indicators and preconditions of good quality of rehabilitative care. Patients' quality concepts differ in some aspect from the quality definitions of health care professionals. There is some evidence that patients' views on quality are a necessary extension and completion of programme evaluation and of quality management. They influence usage and selection of rehabilitation facilities and programme elements and probably patient satisfaction and long-term outcomes as well. Patients' ideas could contribute to gaining a deeper understanding of patients' needs. Here, patients are experts to define challenges for long-term improvements in health and health-related behavior with regard to everyday life and related resources and barriers. Taking patients' views on the quality of rehabilitation into account could help to adapt rehabilitation features, programmes and long-term offers more adequately to patients' needs. More systematic evidence is however needed as a basis for further developments in rehabilitation programmes.     

Foreword to “the girl in the raindrop”

The issue of whether suicide can be a good death was separated into two different questions: (1) can suicide be an appropriate death, and (2) can suicide be a rational death? Several definitions of an “appropriate” death were proposed, and suicide was seen as potentially appropriate. Similarly, several criteria for rationality were proposed and suicide was seen as sometimes meeting these criteria. Thus, suicide can be sometimes conceptualized as a “good” death.     

Sounds of the future? Ultrasonography in the field

During the past two decades, the development and maturation of ultrasonography as a diagnostic tool has revolutionized the practice of radiology, cardiology, obstetrics and surgery. In fact, few areas of medicine have not been affected by this technology. Unlike the still-frame images of standard X-rays and computerized axial tomography (CAT) scans, ultrasound technology displays an ongoing cross-sectional image of an anatomic area in "real time," which can then be stored and played back on videotape. This ability to quickly assess function, as well as anatomy, has become invaluable in the management of critically ill patients.     

Infections in the survivors of out-of-hospital cardiac arrest in the first 7 days

Objective To evaluate the incidence, risk factors, foci, isolated organisms, and outcomes of infections in the survivors of out-of-hospital cardiac arrest (OHCA) within the first 7 days after resuscitation.Design and setting Retrospective cohort study in the intensive care unit of a university hospital.Patients and participants We enrolled 117 survivors of adult nontraumatic OHCA victims who survived more than 24 h between January 1999 and May 2004. We collected patients demographics, the causes and initial electrocardiographic rhythm of cardiac arrest, and the process of cardiopulmonary resuscitation. The incidence, clinical presentations and outcomes of infections occurring in the first 7 days after resuscitation were evaluated. Variables were compared between the infected and noninfected patients.Measurements and results Among our OHCA survivors asystole was the most common initial rhythm (66%). Eighty-three patients (71%) were found to have infection. Pneumonia was the most common infection (61%) followed by bacteremia (13%). Although the Gram-negative bacteria were responsible for most infections, the most commonly isolated organism was Staphylococcus aureus. The infection group had more patients with dementia and noncardiac causes of OHCA. The survival curves did not differ significantly between infection and noninfection groups.Conclusions Infections were common in OHCA survivors during the first 7 days. The most common responsible organisms were Gram-negative bacteria, and the most commonly isolated organism was S. aureus. Infections in the early stage after return of spontaneous circulation did not change the hospital mortality and hospitalization duration.     

Abdominal Pain in the Post-menopausal Female: Is Ovarian Torsion in the Differential?

Background

Ovarian torsion is often thought of as a disease process of reproductive-aged women; however, it is also seen in the extremes of age. In post-menopausal women, it can be both a challenge to diagnose and associated with increased morbidity.

Understanding the Outcome in the Chinese Changjiang Disaster in 2015: A Retrospective Study

Background

Rescue after a maritime disaster remains a great challenge in emergency medicine.