The potential impact of COVID-19 on male reproductive health

The SARS-CoV-2 virus continues to overwhelm health care systems impairing human to human social and economic interactions. Invasion or damage to the male reproductive system is one of the documented outcomes of viral infection. Existing studies have reported that SARS-CoV-2 may contribute to this loss in relation to inflammatory responses and the formation of cytokine storms in COVID-19 patients. Although direct infection of the testes and entry of SARS-CoV-2 into semen as well as subsequent consequences on the male reproductive system need to be studied more systematically, warnings from two organising ASRM and SART for prospective parents when infected with SARS-CoV-2 should be considered. In the context of an increasingly complex pandemic, this review provides preliminary examples of the potential impact of COVID-19 on male reproductive health and guidance for prospective parents currently infected with or recovering from SARS-CoV-2.

Skill decay following Basic Life Support training: a systematic review protocol

INTRODUCTION

Survival from out of hospital cardiac arrest (OHCA) is lower in the UK than in several developed nations. Bystander cardiopulmonary resuscitation (CPR) is associated with increased rates of survival to hospital discharge following OHCA, prompting the introduction of several initiatives by the UK government to increase rates of bystander CPR, including the inclusion of Basic Life Support (BLS) teaching within the English national curriculum. While there is clear benefit in this, increasing evidence suggests poor retention of skills following BLS teaching. The aim of this systematic review is to summarise the literature regarding skill decay following BLS training, reporting particularly the time period over which this occurs, and which components of would-be rescuers' performance of the BLS algorithm are most affected.

METHODS AND ANALYSIS

A search will be conducted to identify studies in which individuals have received BLS training and received subsequent assessment of their skills at a later date. A search strategy comprising relevant Medical Subject Headings (MeSH) terms and keywords has been devised with assistance from an experienced librarian. Relevant databases will be searched with titles, abstract and full-text review conducted independently by two reviewers. Data will be extracted from included studies by two reviewers, with meta-analysis conducted if the appropriate preconditions (such as limited heterogeneity) are met.

ETHIC AND DISSEMINATION

No formal ethical approval is required for this systematic review. Results will be disseminated in the form of manuscript submission to a relevant journal and presentation at relevant meetings. To maximise the public's access to this review's findings, any scientific report will be accompanied by a lay summary posted via social media channels, and a press release disseminated to national and international news agencies.

PROSPERO REGISTRATION NUMBER

CRD42021237233.

Spontaneous retropharyngeal haematoma with direct oral anticoagulant medication

A 79-year-old man presented to the emergency department following a 1-week history of dyspnoea, dysphonia, dysphagia and a nonproductive cough. Previous medical history included atrial fibrillation, for which he was taking rivaroxaban, hypertension and obstructive sleep apnoea. On assessment, there was a mild stridor, swelling of the anterior aspect of the neck and submandibular bruising. CT of the neck demonstrated prevertebral soft tissue swelling extending from C1 to C6 levels, approximately 88 mm in length with a maximum depth of 25 mm. A diagnosis of spontaneous retropharyngeal haematoma was made: the airway was secured with fibreoptic nasal intubation and the patient admitted to the intensive care unit. Direct and fibreoptic assessment of the airway on day 3 confirmed that the haematoma had significantly reduced in size. The patient was extubated on day 4 and made a good recovery.

Effect of Hydrocortisone on Mortality and Organ Support in Patients With Severe COVID-19: The REMAP-CAP COVID-19 Corticosteroid Domain Randomized Clinical Trial

IMPORTANCE

Evidence regarding corticosteroid use for severe coronavirus disease 2019 (COVID-19) is limited.

OBJECTIVE

To determine whether hydrocortisone improves outcome for patients with severe COVID-19.

DESIGN, SETTING, AND PARTICIPANTS

An ongoing adaptive platform trial testing multiple interventions within multiple therapeutic domains, for example, antiviral agents, corticosteroids, or immunoglobulin. Between March 9 and June 17, 2020, 614 adult patients with suspected or confirmed COVID-19 were enrolled and randomized within at least 1 domain following admission to an intensive care unit (ICU) for respiratory or cardiovascular organ support at 121 sites in 8 countries. Of these, 403 were randomized to open-label interventions within the corticosteroid domain. The domain was halted after results from another trial were released. Follow-up ended August 12, 2020.

INTERVENTIONS

The corticosteroid domain randomized participants to a fixed 7-day course of intravenous hydrocortisone (50 mg or 100 mg every 6 hours) (n = 143), a shock-dependent course (50 mg every 6 hours when shock was clinically evident) (n = 152), or no hydrocortisone (n = 108).

MAIN OUTCOMES AND MEASURES

The primary end point was organ support-free days (days alive and free of ICU-based respiratory or cardiovascular support) within 21 days, where patients who died were assigned -1 day. The primary analysis was a bayesian cumulative logistic model that included all patients enrolled with severe COVID-19, adjusting for age, sex, site, region, time, assignment to interventions within other domains, and domain and intervention eligibility. Superiority was defined as the posterior probability of an odds ratio greater than 1 (threshold for trial conclusion of superiority >99%).

RESULTS

After excluding 19 participants who withdrew consent, there were 384 patients (mean age, 60 years; 29% female) randomized to the fixed-dose (n = 137), shock-dependent (n = 146), and no (n = 101) hydrocortisone groups; 379 (99%) completed the study and were included in the analysis. The mean age for the 3 groups ranged between 59.5 and 60.4 years; most patients were male (range, 70.6%-71.5%); mean body mass index ranged between 29.7 and 30.9; and patients receiving mechanical ventilation ranged between 50.0% and 63.5%. For the fixed-dose, shock-dependent, and no hydrocortisone groups, respectively, the median organ support-free days were 0 (IQR, -1 to 15), 0 (IQR, -1 to 13), and 0 (-1 to 11) days (composed of 30%, 26%, and 33% mortality rates and 11.5, 9.5, and 6 median organ support-free days among survivors). The median adjusted odds ratio and bayesian probability of superiority were 1.43 (95% credible interval, 0.91-2.27) and 93% for fixed-dose hydrocortisone, respectively, and were 1.22 (95% credible interval, 0.76-1.94) and 80% for shock-dependent hydrocortisone compared with no hydrocortisone. Serious adverse events were reported in 4 (3%), 5 (3%), and 1 (1%) patients in the fixed-dose, shock-dependent, and no hydrocortisone groups, respectively.

CONCLUSIONS AND RELEVANCE

Among patients with severe COVID-19, treatment with a 7-day fixed-dose course of hydrocortisone or shock-dependent dosing of hydrocortisone, compared with no hydrocortisone, resulted in 93% and 80% probabilities of superiority with regard to the odds of improvement in organ support-free days within 21 days. However, the trial was stopped early and no treatment strategy met prespecified criteria for statistical superiority, precluding definitive conclusions.

TRIAL REGISTRATION

ClinicalTrials.gov Identifier: NCT02735707.

Effect of Hydrocortisone on Mortality and Organ Support in Patients With Severe COVID-19: The REMAP-CAP COVID-19 Corticosteroid Domain Randomized Clinical Trial

IMPORTANCE

Evidence regarding corticosteroid use for severe coronavirus disease 2019 (COVID-19) is limited.

OBJECTIVE

To determine whether hydrocortisone improves outcome for patients with severe COVID-19.

DESIGN, SETTING, AND PARTICIPANTS

An ongoing adaptive platform trial testing multiple interventions within multiple therapeutic domains, for example, antiviral agents, corticosteroids, or immunoglobulin. Between March 9 and June 17, 2020, 614 adult patients with suspected or confirmed COVID-19 were enrolled and randomized within at least 1 domain following admission to an intensive care unit (ICU) for respiratory or cardiovascular organ support at 121 sites in 8 countries. Of these, 403 were randomized to open-label interventions within the corticosteroid domain. The domain was halted after results from another trial were released. Follow-up ended August 12, 2020.

INTERVENTIONS

The corticosteroid domain randomized participants to a fixed 7-day course of intravenous hydrocortisone (50 mg or 100 mg every 6 hours) (n = 143), a shock-dependent course (50 mg every 6 hours when shock was clinically evident) (n = 152), or no hydrocortisone (n = 108).

MAIN OUTCOMES AND MEASURES

The primary end point was organ support-free days (days alive and free of ICU-based respiratory or cardiovascular support) within 21 days, where patients who died were assigned -1 day. The primary analysis was a bayesian cumulative logistic model that included all patients enrolled with severe COVID-19, adjusting for age, sex, site, region, time, assignment to interventions within other domains, and domain and intervention eligibility. Superiority was defined as the posterior probability of an odds ratio greater than 1 (threshold for trial conclusion of superiority >99%).

RESULTS

After excluding 19 participants who withdrew consent, there were 384 patients (mean age, 60 years; 29% female) randomized to the fixed-dose (n = 137), shock-dependent (n = 146), and no (n = 101) hydrocortisone groups; 379 (99%) completed the study and were included in the analysis. The mean age for the 3 groups ranged between 59.5 and 60.4 years; most patients were male (range, 70.6%-71.5%); mean body mass index ranged between 29.7 and 30.9; and patients receiving mechanical ventilation ranged between 50.0% and 63.5%. For the fixed-dose, shock-dependent, and no hydrocortisone groups, respectively, the median organ support-free days were 0 (IQR, -1 to 15), 0 (IQR, -1 to 13), and 0 (-1 to 11) days (composed of 30%, 26%, and 33% mortality rates and 11.5, 9.5, and 6 median organ support-free days among survivors). The median adjusted odds ratio and bayesian probability of superiority were 1.43 (95% credible interval, 0.91-2.27) and 93% for fixed-dose hydrocortisone, respectively, and were 1.22 (95% credible interval, 0.76-1.94) and 80% for shock-dependent hydrocortisone compared with no hydrocortisone. Serious adverse events were reported in 4 (3%), 5 (3%), and 1 (1%) patients in the fixed-dose, shock-dependent, and no hydrocortisone groups, respectively.

CONCLUSIONS AND RELEVANCE

Among patients with severe COVID-19, treatment with a 7-day fixed-dose course of hydrocortisone or shock-dependent dosing of hydrocortisone, compared with no hydrocortisone, resulted in 93% and 80% probabilities of superiority with regard to the odds of improvement in organ support-free days within 21 days. However, the trial was stopped early and no treatment strategy met prespecified criteria for statistical superiority, precluding definitive conclusions.

TRIAL REGISTRATION

ClinicalTrials.gov Identifier: NCT02735707.

Biomarker-guided antibiotic stewardship in suspected ventilator-associated pneumonia (VAPrapid2): a randomised controlled trial and process evaluation

BACKGROUND

Ventilator-associated pneumonia is the most common intensive care unit (ICU)-acquired infection, yet accurate diagnosis remains difficult, leading to overuse of antibiotics. Low concentrations of IL-1β and IL-8 in bronchoalveolar lavage fluid have been validated as effective markers for exclusion of ventilator-associated pneumonia. The VAPrapid2 trial aimed to determine whether measurement of bronchoalveolar lavage fluid IL-1β and IL-8 could effectively and safely improve antibiotic stewardship in patients with clinically suspected ventilator-associated pneumonia.

METHODS

VAPrapid2 was a multicentre, randomised controlled trial in patients admitted to 24 ICUs from 17 National Health Service hospital trusts across England, Scotland, and Northern Ireland. Patients were screened for eligibility and included if they were 18 years or older, intubated and mechanically ventilated for at least 48 h, and had suspected ventilator-associated pneumonia. Patients were randomly assigned (1:1) to biomarker-guided recommendation on antibiotics (intervention group) or routine use of antibiotics (control group) using a web-based randomisation service hosted by Newcastle Clinical Trials Unit. Patients were randomised using randomly permuted blocks of size four and six and stratified by site, with allocation concealment. Clinicians were masked to patient assignment for an initial period until biomarker results were reported. Bronchoalveolar lavage was done in all patients, with concentrations of IL-1β and IL-8 rapidly determined in bronchoalveolar lavage fluid from patients randomised to the biomarker-based antibiotic recommendation group. If concentrations were below a previously validated cutoff, clinicians were advised that ventilator-associated pneumonia was unlikely and to consider discontinuing antibiotics. Patients in the routine use of antibiotics group received antibiotics according to usual practice at sites. Microbiology was done on bronchoalveolar lavage fluid from all patients and ventilator-associated pneumonia was confirmed by at least 104 colony forming units per mL of bronchoalveolar lavage fluid. The primary outcome was the distribution of antibiotic-free days in the 7 days following bronchoalveolar lavage. Data were analysed on an intention-to-treat basis, with an additional per-protocol analysis that excluded patients randomly assigned to the intervention group who defaulted to routine use of antibiotics because of failure to return an adequate biomarker result. An embedded process evaluation assessed factors influencing trial adoption, recruitment, and decision making. This study is registered with ISRCTN, ISRCTN65937227, and ClinicalTrials.gov, NCT01972425.

FINDINGS

Between Nov 6, 2013, and Sept 13, 2016, 360 patients were screened for inclusion in the study. 146 patients were ineligible, leaving 214 who were recruited to the study. Four patients were excluded before randomisation, meaning that 210 patients were randomly assigned to biomarker-guided recommendation on antibiotics (n=104) or routine use of antibiotics (n=106). One patient in the biomarker-guided recommendation group was withdrawn by the clinical team before bronchoscopy and so was excluded from the intention-to-treat analysis. We found no significant difference in the primary outcome of the distribution of antibiotic-free days in the 7 days following bronchoalveolar lavage in the intention-to-treat analysis (p=0·58). Bronchoalveolar lavage was associated with a small and transient increase in oxygen requirements. Established prescribing practices, reluctance for bronchoalveolar lavage, and dependence on a chain of trial-related procedures emerged as factors that impaired trial processes.

INTERPRETATION

Antibiotic use remains high in patients with suspected ventilator-associated pneumonia. Antibiotic stewardship was not improved by a rapid, highly sensitive rule-out test. Prescribing culture, rather than poor test performance, might explain this absence of effect.

FUNDING

UK Department of Health and the Wellcome Trust.

Monitoring the injured patient

Monitoring of the injured patient is important. It includes clinical assessment, following the ABCDE approach, and the use of instruments found from the prehospital to critical care setting.

Correctly used, these provide important information about the patient's current physiological state and response to treatment plus diagnostic and prognostic implications that are useful to the clinician involved in the care of injured patients.

Prehospital anaesthesia performed by physician/critical care paramedic teams in a major trauma network in the UK: a 12 month review of practice

INTRODUCTION

In the West Midlands region of the UK, delivery of pre-hospital care has been remodelled through introduction of a 24 h Medical Emergency Response Incident Team (MERIT). Teams including physicians and critical care paramedics (CCP) are deployed to incidents on land-based and helicopter-based platforms. Clinical practice, including delivery of rapid sequence induction of anaesthesia (RSI), is underpinned by standard operating procedures (SOP). This study describes the first 12 months experience of prehospital RSI in the MERIT scheme in the West Midlands.

METHODS

Retrospective review of the MERIT clinical database for the 12 months following the launch of the scheme. Data was collected relating to the number of RSIs performed; indication for RSI; number of intubation attempts; grade of view on laryngoscopy and the base speciality/grade of the operator performing intubation.

RESULTS

MERIT teams were activated 1619 times, attending scene in 1029 cases. RSI was performed 142 times (13.80% of scene attendances). There was one recorded case of failure to intubate requiring insertion of a supraglottic airway device (0.70%). In over a third of RSI cases, CCPs performed laryngoscopy and intubation (n=53, 37.32%). Proficiency of obtaining Grade I view at laryngoscopy was similar for physicians (74.70%) and CCPs (77.36%). Intubation was successful at the first attempt in over 90% of cases.

CONCLUSIONS

This study demonstrates that operation within a system that provides high levels of exposure, underpinned by comprehensive and robust training and governance frameworks, promotes levels of performance in successful prehospital RSI regardless of base speciality or profession.

Comparison of the quality of basic life support provided by rescuers trained using the 2005 or 2010 ERC guidelines

INTRODUCTION

Effective delivery of cardiopulmonary resuscitation (CPR) and prompt defibrillation following sudden cardiac arrest (SCA) is vital. Updated guidelines for adult basic life support (BLS) were published in 2010 by the European Resuscitation Council (ERC) in an effort to improve survival following SCA. There has been little assessment of the ability of rescuers to meet the standards outlined within these new guidelines.

METHODS

We conducted a retrospective analysis of the performance of first year healthcare students trained and assessed using either the new 2010 ERC guidelines or their 2005 predecessor, within the University of Birmingham, United Kingdom. All students were trained as lay rescuers during a standardised eight hour ERC-accredited adult BLS course.

RESULTS

We analysed the examination records of 1091 students. Of these, 561 were trained and assessed using the old 2005 ERC guidelines and 530 using the new 2010 guidelines. A significantly greater proportion of candidates failed in the new guideline group (16.04% vs. 11.05%; p < 0.05), reflecting a significantly greater proportion of lay-rescuers performing chest compressions at too fast a rate when trained and assessed with the 2010 rather than 2005 guidelines (6.04% vs. 2.67%; p < 0.05). Error rates for other skills did not differ between guideline groups.

CONCLUSIONS

The new ERC guidelines lead to a greater proportion of lay rescuers performing chest compressions at an erroneously fast rate and may therefore worsen BLS efficacy. Additional study is required in order to define the clinical impact of compressions performed to a greater depth and at too fast a rate.

Peer-led training and assessment in basic life support for healthcare students: synthesis of literature review and fifteen years practical experience

BACKGROUND

In 1995, the University of Birmingham, UK, School of Medicine and Dentistry replaced lecture-based basic life support (BLS) teaching with a peer-led, practical programme. We present our 15-yr experience of peer-led healthcare undergraduate training and examination with a literature review.

METHODS

A literature review of healthcare undergraduate peer-led practical skills teaching was performed though Pubmed. The development of the Birmingham course is described, from its inception in 1995-2011. Training methods include peer-led training and assessment by senior students who complete an European Resuscitation Council-endorsed instructor course. Student assessors additionally undergo training in assessment and communication skills. The course has been developed by parallel research evaluation and peer-reviewed publication. Course administration is by an experienced student committee with senior clinician support. Anonymous feedback from the most recent courses and the current annual pass rates are reported.

RESULTS

The literature review identified 369 publications of which 28 met our criteria for inclusion. Largely descriptive, these are highly positive about peer involvement in practical skills teaching using similar, albeit smaller, courses to that described below. Currently approximately 600 first year healthcare undergraduates complete the Birmingham course; participant numbers increase annually. Successful completion is mandatory for students to proceed to the second year of studies. First attempt pass rate is 86%, and close to 100% (565/566 students, 99.8%) following re-assessment the same day. 97% of participants enjoyed the course, 99% preferred peer-tutors to clinicians, 99% perceived teaching quality as "good" or "excellent", and felt they had sufficient practice. Course organisation was rated "good" or "excellent" by 91%. Each year 3-4 student projects have been published or presented internationally. The annual cost of providing the course is currently £15,594.70 (Eur 18,410), or approximately £26 (Eur 30) per student.

CONCLUSIONS

This large scale, peer-led BLS course demonstrates that such programmes can have excellent outcomes with outstanding participant satisfaction. Peer-tutors and assessors are competent, more available and less costly than clinical staff. Student instructors develop skills in teaching, assessment and appraisal, organisation and research. Sustainability is possible given succession-planning and consistent leadership.

Comparison of the errors in basic life support performance after training using the 2000 and 2005 ERC guidelines

The importance of immediate cardiopulmonary resuscitation (CPR) and defibrillation after cardiac arrest is established. The 2005 European Resuscitation Council (ERC) guidelines were altered to try to improve survival after cardiac arrest. This observational study compares the errors in basic life support (BLS) performance after training using the 2000 or 2005 guidelines. First-year healthcare students at the University of Birmingham, United Kingdom, were taught adult BLS in a standardised 8-h course: an historical group with previous ERC guidelines (Old), the other with 2005 ERC guidelines (New). 2537 (Old 1773; New 764) students were trained and assessed in BLS. There was no difference in overall error rate between Old and New (5.53% vs. 6.70% (p>0.05)) or adherence to the sequence of the respective BLS algorithm. The New group ("hands in centre of the chest") had significantly more erroneous hand positions compared to the Old group (5.23% vs. 1.64%, p<0.001). The 2005 ERC guidelines do not significantly improve correct BLS performance. Removal of hand placement measurement results in a significant increase in hand position errors. The clinical benefit of an increased number of compressions impaired by worsened hand positioning is unknown and requires further study.

An assessment of the validity of SOFA score based triage in H1N1 critically ill patients during an influenza pandemic

Sequential Organ Failure Assessment (SOFA) score based triage of influenza A H1N1 critically ill patients has been proposed for surge capacity management as a guide for clinical decision making. We conducted a retrospective records review and SOFA scoring of critically ill patients with influenza A H1N1 in a mixed medical-surgical intensive care unit in an urban hospital. Eight critically ill patients with influenza A H1N1 were admitted to the intensive care unit. Their mean (range) age was 39 (26-52) years with a length of stay of 11 (3-17) days. All patients met SOFA score based triage admission criteria with a modal SOFA score of five. Five patients required invasive ventilation for a mean (range) of 5 (4-11) days. Five patients would have been considered for withdrawal of treatment using SOFA scoring guidelines at 48 h. All patients survived. We conclude that SOFA score based triage could lead to withdrawal of life support in critically ill patients who could survive with an acceptably low length of stay in the intensive care unit.

Resuscitation of patients after traumatic brain injury

Traumatic brain injury (TBI) is the commonest worldwide cause of death and disability in people under 45 years of age. Following an injury of this nature, physiological derangements, both systemic and within the brain, rapidly progress and have a deleterious effect on outcome. There is a lack of brain specific treatments that significantly improve outcome and management must therefore be best care of appropriate physiology, along the familiar ABC lines. There are international guidelines that describe targets to be achieved. Methods to do this plus the rationale for doing so are discussed in this article.

Teaching recognition of agonal breathing improves accuracy of diagnosing cardiac arrest

OBJECTIVE

Agonal breathing is present in up to 40% of pre-hospital cardiac arrests and is commonly mistaken as a sign of circulation leading to omission of bystander resuscitation. The aim of this study was to test the hypothesis that specific tuition on agonal breathing improves the accuracy of checking for signs of circulation as a diagnostic test for cardiac arrest.

METHODS

First year medical students were randomised to control or intervention groups. The control group were taught standard CPR according to current guidelines. The intervention group received standard CPR training plus specific tuition on the characteristics of agonal breathing. Two weeks after initial training, the students' ability to recognise cardiac arrest was tested using a simulated cardiac arrest victim demonstrating normal, absent or agonal breathing. Diagnostic accuracy, sensitivity and specificity for the decision to start CPR was calculated.

RESULTS

Sixty-four students were equally randomised to intervention and control groups. The intervention group had greater diagnostic accuracy for cardiac arrest compared to the control group (90% versus 78%, P=0.03). The intervention group were more likely to recognise cardiac arrest correctly and initiate CPR than the control group (sensitivity 90% versus 78%, P=0.02). The improved results were predominantly due to recognition that agonal breathing is a sign of cardiac arrest (75% intervention group versus 43% control group, P=0.01).

CONCLUSION

This study demonstrates improved diagnostic accuracy and sensitivity of "checking for signs of circulation" by teaching CPR providers to recognise agonal breathing as a sign of cardiac arrest.

Critically injured patients, inaccessible airways, and laryngeal mask airways

Managing the airway of a critically injured trauma patient in the prehospital environment is challenging, especially when access to the patient's airway is limited as is often the case in vehicle entrapment incidents. This paper reports the use of the laryngeal mask airway as an adjunct to airway management when attempts using simple airway management techniques have failed to provide adequate oxygenation and ventilation and limited access to the patient precluded endotracheal intubation.

Birmingham assessment of breathing study (BABS)

BACKGROUND

Current international resuscitation guidelines for lay people rely on the assessment of "normal breathing" as a key sign of breathing and circulation. However, it is not known how accurately laypersons can discriminate between "normal" and "abnormal" breathing. The aim of this study was to test the ability of medical students to discriminate between simulated normal and abnormal breathing patterns and select the correct treatment.

METHODS

Six video clips of simulated breathing were recorded showing: normal; abnormal -shallow, rapid, agonal (obstructed and unobstructed airways); or absent breathing. The clips were validated by three experienced emergency practitioners and then shown in a random order to 48 second-year medical students. For each clip observers were asked to indicate: "Is this patient breathing?" (yes-normal, yes-abnormal, no) and "What action would you take?" (rescue breathing or recovery position).

RESULTS

All experts correctly identified the breathing type and agreed on an appropriate emergency action. Students identified normal breathing as: normal 61%, abnormal 33% and absent 6%; abnormal breathing as: normal 29%, abnormal 61%, absent 10%; and absent breathing as: normal 8%, abnormal 6%, absent 85%. Correct actions were selected in 86% during normal breathing, 51% during abnormal breathing and 86% during absent breathing. The sensitivity for observers correctly identifying normal from abnormal breathing was 60% and specificity 75% and for selecting the correct action was 42% and 80%, respectively.

CONCLUSIONS

Medical students were unable to identify normal breathing from abnormal breathing reliably resulting in a high number of inappropriate, potentially harmful actions. Further evaluation of the optimal method for assessing for signs of breathing and circulation is required.

Severe lactic acidosis following alcohol related generalised seizures

A 45-year-old alcoholic man presented following several short grand-mal seizures. He was not known to be epileptic. Initial investigations demonstrated a severe lactic acidosis. The rise in lactate was one of the highest levels reported in similar patients. The patient recovered within 4 h of management with oxygen, fluids and sodium bicarbonate. Lactic acidosis following convulsions is often associated with spontaneous resolution and a favourable outcome.

Use of advanced life support skills

BACKGROUND

The Advanced Life Support (ALS) Provider Course trains healthcare professionals in a standardised approach to the management of a cardiac arrest. In the setting of limited resources for healthcare training, it is important that courses are fit for purpose in addressing the needs of both the individual and healthcare system. This study investigated the use of ALS skills in clinical practice after training on an ALS course amongst members of the cardiac arrest team compared to first responders.

METHODS

Questionnaires measuring skill use after an ALS course were distributed to 130 doctors and nurses.

RESULTS

91 replies were returned. Basic life support, basic airway management, manual defibrillation, rhythm recognition, drug administration, team leadership, peri- and post-arrest management and resuscitation in special circumstances were used significantly more often by cardiac arrest team members than first responders. There was no difference in skill use between medically and nursing qualified first responders or arrest team members.

CONCLUSION

We believe that the ALS course is more appropriately targeted to members of a cardiac arrest team. In our opinion the recently launched Immediate Life Support course, in parallel with training in the recognition and intervention in the early stages of critical illness, are more appropriate for the occasional or first responder to a cardiac arrest.

Peer-led resuscitation training for healthcare students: a randomised controlled study

OBJECTIVE

To determine the efficacy of a peer-led tuition model for training healthcare students in basic life support compared to tuition delivered by clinical tutors.

DESIGN AND SETTING

Randomised controlled trial in the Medical School, University of Birmingham, UK.

PARTICIPANTS

122 first-year medical, dental, nursing and physiotherapy students.

INTERVENTIONS

Students were randomised to receive basic life support tuition from either second-year student instructors or from experienced clinical staff.

MEASUREMENTS AND RESULTS

Students' practical skills, knowledge and satisfaction were tested at the end of the course. Instructor reliability was assessed throughout the course. Students taught by their peers were significantly more likely to be successful in the end-of-course practical CPR test than those taught by clinical staff (56/57 vs. 53/62). The student instructors were also found to be more reliable than clinical staff at attending the training sessions (48/48 vs. 36/48). There was no significant difference in the theoretical test results or the students' assessment of the quality of teaching.

CONCLUSIONS

This model of peer-led undergraduate training in basic life support provides a quality of education which is at least as good as that provided by clinical staff, while offering advantages in terms of reliability. The re-deployment of clinical tutors from basic to more advanced training may allow the overall enhancement of undergraduate resuscitation and critical care training.

Electromagnetic fields for the treatment of osteoarthritis

BACKGROUND

As the focus for osteoarthritis (OA) treatment shifts away from drug therapy, we consider the effectiveness of pulsed electric stimulation which is proven to stimulate cartilage growth on the cellular level.

OBJECTIVES

1)To assess the effectiveness of pulsed electric stimulation for the treatment of osteoarthritis (OA). 2) To assess the most effective and efficient method of applying an electromagnetic field, through pulsed electromagnetic fields (PEMF) or electric stimulation, as well as the consideration of length of treatment, dosage, and the frequency of the applications.

SEARCH STRATEGY

We searched PREMEDLINE, MEDLINE, HealthSTAR, CINAHL, PEDro, and the Cochrane Controlled Trials Register (CCTR) up to and including 2001. This included searches through the coordinating offices of the trials registries of the Cochrane Field of Physical and Related Therapies and the Cochrane Musculoskeletal Group for further published and unpublished articles. The electronic search was complemented by hand searches and experts in the area.

SELECTION CRITERIA

Randomized controlled trials and controlled clinical trials that compared PEMF or direct electric stimulation against placebo in patients with OA.

DATA COLLECTION AND ANALYSIS

Two reviewers determined the studies to be included in the review based on inclusion and exclusion criteria (JH,VR) and extracted the data using pre-developed extraction forms for the Cochrane Musculoskeletal Group. The methodological quality of the trials was assessed by the same reviewers using a validated scale (Jadad 1996). Osteoarthritis outcome measures were extracted from the publications according to OMERACT guidelines (Bellamy 1997) and additional secondary outcomes considered.

MAIN RESULTS

Only three studies with a total of 259 OA patients were included in the review. Electrical stimulation therapy had a small to moderate effect on outcomes for knee OA, all statistically significant with clinical benefit ranging from 13-23% greater with active treatment than with placebo. Only 2 outcomes for cervical OA were significantly different with PEMF treatment and no clinical benefit can be reported with changes of 12% or less.

REVIEWER'S CONCLUSIONS

Current evidence suggests that electrical stimulation therapy may provide significant improvements for knee OA, but further studies are required to confirm whether the statistically significant results shown in these trials confer to important benefits.

Variability in the assessment of advanced life support skills

The number of short 'life support' and emergency care courses available are increasing. Variability in examiner assessments has been reported previously in more traditional types of examinations but there is little data on the reliability of the assessments used on these newer courses. This study evaluated the reliability and consistency of instructor marking for the Resuscitation Council UK Advanced Life Support Course. Twenty five instructors from 15 centres throughout the UK were shown four staged video recorded defibrillation tests (one repeated) and three cardiac arrest simulation tests in order to assess inter-observer and intra-observer variability. These tests form part of the final assessment of competence on an Advanced Life Support course. Significant levels of variability were demonstrated between instructors with poor levels of agreement of 52-80% for defibrillation tests and 52-100% for cardiac arrest simulation tests. There was evidence of differences in the observation/recognition of errors and rating tendencies of instructors. Four instructors made a different pass/fail decision when shown defibrillation test 2 for a second time leading to only moderate levels of intra-observer agreement (kappa=0.43). In conclusion there is significant variability between instructors in the assessment of advanced life support skills, which may undermine the present assessment mechanisms for the advanced life support course. Validation of the assessment tools for the rapidly growing number of life support courses is required with urgent steps to improve reliability where required.