Does HIV status influence the outcome of patients admitted to a surgical intensive care unit? A prospective double blind study

Sedation and analgesia in the trauma intensive care unit of Inkosi Albert Luthuli Central Hospital - the effect of anti-retroviral therapy: A retrospective chart analysis

PURPOSE

Adequate access to antiretrovirals (ARV) has improved the longevity and quality of life of people living with the human immunodeficiency virus(HIV). Antiretrovirals are known to cause multiple drug-drug interactions. It was noted clinically that patients on ARVs appeared to be more difficult to sedate. This begs the question of the clinical impact of these drug interactions, should clinicians adjust sedative dosages when managing patients on ARVs? This study aimed to investigate the presence of and measure the differences in sedation and analgesic utilisation between polytrauma patients on ARVs and those not on ARVs.

METHODS

This retrospective observational chart review included consecutive adult polytrauma patients admitted to the Trauma ICU IALCH between January 2016 and December 2019. HIV status and ARV use was documented. The total sedation per drug utilised at 24, 48 and 72-hour interval was calculated and tabulated accordingly. Drug utilisation was compared to ARV status.

RESULTS

A total of 216 adult polytrauma patients were included in the study. A total of 44 patients were HIV positive and 172 were HIV negative. Of the HIV positive patients 41 (93.2%) were on ARVs. Multiple comparisons were confirmed, however the primary analysis compared HIV negative patients with HIV positive patients on ARV. Total morphine, ketamine, midazolam and propofol doses were all numerically greater in patients on ARVs, although none of these reached statistical significance. The use of morphine rescue boluses during the first 72 h of ICU admission and the doses of ketamine and propofol on ICU day 3 were significantly greater in those on ARVs.

CONCLUSION

The data analysis showed that patients on ARVs required higher doses of some analgesia and sedation in ICU and lower doses of midazolam. This needs to be considered when sedating patients in a setting with a high HIV prevalence.

Acute abdomen in the immunocompromised patient: WSES, SIS-E, WSIS, AAST, and GAIS guidelines

Immunocompromised patients are a heterogeneous and diffuse category frequently presenting to the emergency department with acute surgical diseases. Diagnosis and treatment in immunocompromised patients are often complex and must be multidisciplinary. Misdiagnosis of an acute surgical disease may be followed by increased morbidity and mortality. Delayed diagnosis and treatment of surgical disease occur; these patients may seek medical assistance late because their symptoms are often ambiguous. Also, they develop unique surgical problems that do not affect the general population. Management of this population must be multidisciplinary.This paper presents the World Society of Emergency Surgery (WSES), Surgical Infection Society Europe (SIS-E), World Surgical Infection Society (WSIS), American Association for the Surgery of Trauma (AAST), and Global Alliance for Infection in Surgery (GAIS) joined guidelines about the management of acute abdomen in immunocompromised patients.

Postoperative CD4 counts predict anastomotic leaks in patients with penetrating abdominal trauma

INTRODUCTION

The influence of trauma- and surgical stress-induced decrease of CD4 count on anastomotic leaks after penetrating abdominal trauma has to date not been investigated. A prospective study was performed to explore the effect of CD4 count 24 h after surgery on the anastomotic leak rate and to identify risk factors for anastomotic leaks.

METHODS

This was a prospective study including 98 patients with small or large bowel resection and subsequent anastomosis due to penetrating abdominal trauma. Univariate analysis identified risk factors for the development of anastomotic leak and also investigated the predictive value of the CD4 count for this complication.

RESULTS

Of the 98 patients 23 patients (23%) were HIV-infected. The overall leak rate was 13%. Univariate analysis including all potential risk factors with p-values<0.05 identified six factors leading to a significantly higher rate of anastomotic complications: postoperative CD4 count<250 cells/μl, postoperative albumin <30 g/L, penetrating abdominal trauma index≥25, gunshot wound as mechanism of injury, blood transfusion requirement >6units and delayed anastomosis after damage control surgery. Survival rates were analysed with the χ² test and did not show a significantly higher mortality rate in patients with low CD4 count. The negative impact of trauma and subsequent surgery on the cell mediated immunity was demonstrated by the fact that 55 (73%) of the HIV-negative patients had a CD4 count less than 500 cells/μl 24 h postoperatively. HIV-infection had no significant influence on the leak rate, however all HIV infected patients that developed an anastomotic leak died.

CONCLUSION

A low post-operative CD4 count is a predictor for anastomotic leaks irrespective of HIV-serostatus. Low postoperative serum albumin, high injury severity, gunshot wound as mechanism of injury, blood transfusion requirement >6 units and delayed anastomosis were further risk factors for anastomotic complications. Postoperative CD4 count and serum albumin should be considered in the decision making process of performing an anastomosis or diverting stoma for patients after "clip and drop" of the bowel as part of damage control surgery.

The Effect of Human-Immunodeficiency Virus Status on Outcomes in Penetrating Abdominal Trauma: An Interim Analysis

BACKGROUND

The purpose of this study was to determine whether the outcomes of hemodynamically stable patients undergoing exploratory laparotomy for penetrating abdominal trauma differed as a result of their HIV status.

METHODS

This was an observational, prospective study from February 2016 to May 2017. All hemodynamically stable patients with penetrating abdominal trauma requiring a laparotomy were included. The mechanism of injury, the HIV status, age, the penetrating abdominal trauma index (PATI), and the revised trauma score (RTS) were entered into a binary logistic regression model. Outcome parameters were in-hospital death, morbidity, admission to intensive care unit (ICU), relaparotomy within 30 days, and length of stay longer than 30 days.

RESULTS

A total of 209 patients, 94% male, with a mean age of 29 ± 10 years were analysed. Twenty-eight patients (13%) were HIV positive. The two groups were comparable. Ten (4.8%) laparotomies were negative. There were two (0.96%) deaths, both in the HIV negative group. The complication rate was 34% (n = 72). Twenty-nine patients (14%) were admitted to the ICU. A higher PATI, older age, and a lower RTS were significant risk factors for ICU admission. After 30 days, 12 patients (5.7%) were still in hospital. Twenty-four patients (11%) underwent a second laparotomy. The PATI score was the single independent predictor for complications, relaparotomy, and hospital stay longer than 30 days.

CONCLUSIONS

Preliminary results reveal that HIV status does not influence outcomes in patients with penetrating abdominal trauma.

Research Governance: Ethical Issues

Healthcare research is haunted by a history of unethical studies in which profound harm was caused to vulnerable individuals. Official systems for gaining ethical approval for research, designed to prevent a repetition of these shameful examples, can prove bureaucratic and inflexible in practice. The core ethical principles of respect for autonomy, prevention of harm, promotion of benefit, and justice (which form the basis of professional codes of research conduct) must be applied flexibly to take account of contextual, methodological, personal and practical considerations. Ensuring that the design and conduct of all research is ethically sound is the responsibility of all involved-including researchers, research institutions, ethics review committees and regulatory bodies.

The effect of stage of HIV disease as determined by CD4 count on clinical outcomes of surgical sepsis in South Africa

INTRODUCTION This paper reviews the impact of the stage of human immunodeficiency virus (HIV) disease on the outcome of surgical sepsis. METHODS All adult emergency general surgical patients (aged >15 years) who fulfilled the criteria for sepsis or septic shock, with a documented surgical source of infection, and who were HIV positive were reviewed. RESULTS During the 5-year study period, a total of 675 patients with a documented surgical source of sepsis were managed by our service; 142 (21%) of these were HIV positive. Among the individuals who were HIV positive, the CD4 count was <200 cells/µl in 21 patients and ≥200 cells/µl in 121 patients. There was no difference between these two cohorts in terms of demography or spectrum of surgical conditions. The range of surgical procedures and complications was also similar in both groups. Nevertheless, patients with a CD count of <200 cells/µl had a significantly longer length of hospital stay than those in the cohort with ≥200 cells/µl. For HIV positive patients with a CD4 count of <200 cells/µl, the mortality rate was 66.7% (14/21) while the mortality rate for individuals with HIV and a CD4 count of ≥200 cells/µl was 2.5% (2/121). This difference was statistically significant (p<0.001). CONCLUSIONS The clinical presentation and spectrum of surgical sepsis disease in cases with stage 1 and stage 2 HIV is not markedly different. However, in patients with a CD4 count of <200 cells/µl, the length of hospital stay and mortality is significantly higher. Stage of HIV disease must be considered when stratifying patients' risk for surgery.

Exceptions to the rule of informed consent for research with an intervention

BACKGROUND

In specific situations it may be necessary to make an exception to the general rule of informed consent for scientific research with an intervention. Earlier reviews only described subsets of arguments for exceptions to waive consent.

METHODS

Here, we provide a more extensive literature review of possible exceptions to the rule of informed consent and the accompanying arguments based on literature from 1997 onwards, using both Pubmed and PsycINFO in our search strategy.

RESULTS

We identified three main categories of arguments for the acceptability of a consent waiver: data validity and quality, major practical problems, and distress or confusion of participants. Approval by a medical ethical review board always needs to be obtained. Further, we provide examples of specific conditions under which consent waiving might be allowed, such as additional privacy protection measures.

CONCLUSIONS

The reasons legitimized by the authors of the papers in this overview can be used by researchers to form their own opinion about requesting an exception to the rule of informed consent for their own study. Importantly, rules and guidelines applicable in their country, institute and research field should be followed. Moreover, researchers should also take the conditions under which they feel an exception is legitimized under consideration. After discussions with relevant stakeholders, a formal request should be sent to an IRB.

HIV testing in the critical care setting: views of patients, family members and health providers from urban South Africa

As antiretroviral treatment has led to decreased morbidity, HIV testing policy has increasingly shifted towards routine, provider-initiated approaches. Yet, few studies have examined the acceptability of provider-initiated HIV testing in the intensive, or critical care setting, where knowledge of HIV status is likely to impact on clinical management but explicit consent for testing is difficult to obtain. We conducted qualitative research in an urban hospital and clinic in Johannesburg. In-depth interviews were conducted among HIV testing clients (n = 20), recently discharged critical care patients (n = 13) and family members of critical care patients (n = 14). One focus group discussion was held with health care providers (n = 10). HIV testing in critical care was viewed as acceptable but challenging to implement. An overarching theme of ambivalence emerged from patients and families, who saw HIV testing as a pre-requisite to appropriate clinical care, but were concerned about the quality of its delivery. While providers were aware of the current "no testing without consent" policy, they expressed frustration in cases when testing was in the patient's best interest but consent could not be obtained. Furthermore, providers found it stressful to weigh up patient confidentiality against medical necessity when assessing patients' "best interests". Without specific guidelines, they often developed pragmatic, ad hoc ways to resolve dilemmas around testing in critical care. Our findings suggest that HIV testing guidelines specific to the critical care setting may help providers do their jobs more ethically and transparently. Provider-initiated approaches are likely to be acceptable to patients and may improve clinical outcomes, but training and support in policy implementation and ethical decision-making are essential.

HIV testing and epidemiology in a hospital-based surgical cohort in Malawi

BACKGROUND

Despite the high prevalence of HIV in adults (11 %) in Malawi, testing among surgical patients is not routine. We examined the feasibility of universal opt-out HIV testing and counseling (HTC) on the surgical wards of Kamuzu Central Hospital in Lilongwe, Malawi, and sought to further delineate the role of HIV in surgical presentation and outcome.

METHODS

We reviewed HTC and surgical admission records from May to October 2011 and compared these data to data collected prospectively on patients admitted from November 2011 through April 2012, after universal HTC implementation.

RESULTS

Prior to universal HTC, 270 of the 2,606 (10.4 %) surgical admissions were tested; 13 % were HIV-infected. After universal HTC implementation, HTC counselors reviewed 1,961 of the 2,488 admissions (79 %): 310 (16 %) had known status (157 seropositive, 153 seronegative) and 1,651 had unknown status (81 %). Among those with unknown status, 97 % (1,598, of 64 % of all admissions) accepted testing, of whom 9 % were found to be HIV-infected. Patients with longer lengths of stay (LOS) (mean = 11 vs. 5 days, p < 0.01) and those who underwent surgical intervention (odds ratio [OR] 2.5; confidence interval [CI] 2.0-3.1) were more likely to have a known status on discharge. HIV was more prevalence in patients with infection and genital/anal warts or ulcers and lower in trauma patients. HIV-positive patients received less surgical intervention (OR 0.69; CI 0.52-0.90), but there was no association between HIV status and length of stay or mortality.

CONCLUSIONS

Universal opt-out HTC on the surgical wards was well accepted and increased the proportion of patients tested. High HIV prevalence in this setting merits implementation of universal HTC.

Complications related to fracture treatment in HIV patients: a case report

We present the case report of a 40-year-old woman who was HIV-positive in Highly Active Anti-Retroviral Therapy (HAART) and affected by femural pertrochanteric fracture, which was treated by endomedullary nailing. Two years after the surgical operation, the woman developed an aseptic symptomatic osteolysis around the implant. Hardware removal was resolutive. Aseptic and septic hardware mobilization, hardware removal, and implant decision in HIV patients with pertrochanteric fractures is discussed. The authors suggest close follow-up and prompt hardware removal, as soon as X-rays demonstrate healing signs, in HIV patients with fracture fixation, if general condition allows.

Comparison of in-hospital morbidity and mortality in HIV-infected and uninfected children after surgery

PURPOSE

Increasingly HIV-infected children can be expected to require surgery. The aim of this study was to compare the outcome of HIV-infected and HIV-unexposed children undergoing surgery.

PATIENTS AND METHODS

A prospective study of children less than or equal to 60 months admitted to a tertiary pediatric surgical service from July 2004 to July 2008. Children underwent age-definitive HIV testing and were followed up postoperatively for complications, length of stay and mortality.

RESULTS

Three hundred and twenty-seven children were enrolled: 82 (23 %) HIV-infected and 245 (67 %) were HIV-unexposed. Eighty-four (26 %) children were malnourished, which was higher in the HIV-infected group [41 (50.0 %) vs. 43 (17.5 %), relative risk (RR) 2.9; 95 % confidence interval (CI) 2.0-4.1; p < 0.0001]. Three hundred and twenty-eight surgical procedures were performed. A similar number of major [28 (34.2 %) vs. 64 (26.1 %); p = 0.2] and emergency procedures [37 (45.1 %) vs. 95 (38.8 %); p = 0.34] were performed in each group. HIV-infected children had a higher rate of contamination at surgery [40 (48.7 %) vs. 49 (20 %); RR 2.43 (CI 1.7-3.4); p < 0.0001]. There were more complications in the HIV-infected group [34 (41.5 %) vs. 14 (5.7 %); RR 7.3 (CI 4.1-12.8); p < 0.0001]. The most common complications were surgical site complications 30 (55 %), followed by postoperative infections, 19 (34 %). Infections with drug-resistant organisms occurred more commonly in HIV-infected children [11/19 (58 %) vs. 2/13 (15 %); RR 3.8 (CI 1.3-14.2); p = 0.02]. The median length of hospital stay was longer in the HIV-infected group [4 (IQR 2-14) vs. 2 (IQR 1-4) days; p = 0.0001]. There was a higher mortality amongst the HIV-infected group [6 (7.3 %) vs. 0 (0 %); p < 0.0001].

CONCLUSION

HIV-infected children have a higher rate of postoperative complications and mortality compared with HIV-unexposed children.

The re-emergence of the liberal-communitarian debate in bioethics: exercising self-determination and participation in biomedical research

Biomedical research has brought to the fore the issue of which rights and duties we have to each other and society. Several scholars have advocated reframing the notion of participation, arguing that we have a moral duty to participate in research from which we all benefit. However, less attention has been paid to how we justify and defend the concept of self-determination and what the implications are in a biomedical setting. The author discusses the value and importance of self-determination on the basis of the framework of the liberal-communitarian debate. Biobank research is used as an example of a project wherein, through our participation, we confirm our sense of belonging to society and acknowledge our mutual dependence on each other. We need a richer concept of self-determination that encompasses both liberal and communitarian insights in order to make sense of the value we attach to self-determination.

Surgical implications of human immunodeficiency virus infections

Pediatric HIV (human immunodeficiency virus) is a pandemic predominantly in sub-Saharan Africa. Approximately 2.2 million children aged less than 15 years are infected with HIV, representing almost 95% of the total number of children globally infected with HIV. Therefore, increasing numbers of HIVi or -exposed but uninfected children can be expected to require a surgical procedure to assist in the diagnosis of an HIV/acquired immune deficiency syndrome-related complication, to address a life-threatening complication of the disease, or for routine surgery encountered in HIV-unexposed children. HIVi children may present with both conditions unique to HIV infection and surgical conditions routine in pediatric surgical practice. HIV exposure confers an increased risk of complications and mortality for all children after surgery, whether they are HIV infected or not. This risk of complications is higher in the HIVi group of patients. These findings seem to be independent of whether patients undergo an elective or emergency procedure, but the risk of an adverse outcome is higher for a major procedure. Surgical implications of HIV infection are comprehensively reviewed in this article.

Human immunodeficiency disease: how should it affect surgical decision making?

BACKGROUND

The ever-increasing prevalence of human immunodeficiency virus (HIV) infection and the continued improvement in clinical management has increased the likelihood of surgery being performed on patients with this infection. The aim of the review was to assess current literature on the influence of HIV status on surgical decision-making.

METHODS

A literature review was performed using MEDLINE articles addressing "human immunodeficiency virus," "HIV," "acquired immunodeficiency syndrome," "AIDS," "HIV and surgery." We also manually searched relevant surgical journals and completed the bibliographic compilation by collecting cross references from published papers.

RESULTS

Results of surgery between noninfected and HIV-infected individuals and between HIV-infected and acquired immunodeficiency syndrome (AIDS) patients are variable in terms of morbidity, mortality, and hospital stay. The risk of major surgery is not unlike that for other immunocompromised or malnourished patients. The multiple co-morbidities associated with HIV infection and the availability of highly active antiretroviral therapy must be considered when assessing and optimizing the patient for surgery. The clinical stage of the patient's disease should be evaluated with a focus on the overall organ system function. For patients with advanced HIV disease, palliative surgery offers relief of acute problems with improvement in the quality of life. When indicated, diagnostic surgery assists with further decision-making in the medical management of these patients and hence should not be withheld.

CONCLUSION

HIV infection should not be considered a significant independent factor for major surgical procedures. Appropriate surgery should be offered as in normal surgical patients without fear of an unfavorable outcome.

Outcomes of human immunodeficiency virus-infected and -exposed children undergoing surgery--a prospective study

AIM

Human immunodeficiency virus (HIV)/acquired immune deficiency syndrome (AIDS) is a worldwide pandemic. Mother-to-child transmission programs should theoretically minimize vertical transfer of the virus, but with variable effectiveness of implementation a significant number of children become infected and may present for emergency, diagnostic, and elective surgery. The aim of this study was to prospectively document the clinical presentation, the spectrum of pathology, and surgical outcomes of patients presenting to our hospital. This formed part of a pilot study of a collaborative international working group studying HIV infection in children, which included the Buzzi Children's Hospital Milan, Italy; the University of San Diego, California, USA; and the Red Cross War Memorial Children's Hospital and University of Cape Town, School of Adolescent and Child Health, Cape Town, South Africa.

METHOD

Clinical data from all children admitted to the surgical service of the Red Cross War Memorial Children's Hospital between July 2004 and December 2006 with either a history of HIV exposure (born to an HIV-infected mother) or confirmation of HIV infection by ELISA or polymerase chain reaction was collected. The clinical course was documented prospectively for the duration of admission and subsequent follow-up as recorded in case records review. The spectrum of pathology, surgical intervention, outcome, complications, World Health Organization stage of AIDS, and type of antiretroviral therapy were all noted. Comparative outcomes and subgroup analysis were not done in this part of the study.

RESULTS

One hundred and thirteen patients were included in the study over the 30-month period. The average age was 24 months (1 day to 11 years). Seventy-nine (70%) of the 113 patients were infected and 34 (30%) were exposed, 9 of whom subsequently tested negative. Of the infected group, 53 (67%) patients were on antiretroviral therapy. The extent of disease in the infected group of patients according to the 2006 World Health Organization criteria was as follows: stage 1, 4 (5%); stage 2, 12 (15%); stage 3, 51 (65%); and stage 4, 12 (15%). All patients had nutritional assessments and were plotted on growth curves. Sixty-two (54%) were found to be malnourished and 41 (36%) of the children were found to have comorbid disease processes. Eighteen patients (16%) were treated with antibiotics or conservative therapy alone. The remaining 95 patients (84%) underwent an average of 1.6 procedures (range, 1-35), 59 (52%) in an elective manner and 36 (31%) as an emergency. When assessing the relationship of HIV to the presenting disease state, 58 (73.4%) had HIV-related diseases and 52 (46%) presented with sepsis. A total of 29 (25%) patients had surgical complications of which 6 (20%) were not considered to be HIV related. Nine (31%) had, in retrospect, incorrect management of the presenting disease, leaving 14 (48%) who potentially had HIV-related complications of poor wound healing and sepsis. A total of 100 (88%) were discharged alive, 6 (5.3%) died, and 7 (6 %) were lost to follow-up. Long-term follow-up of 50 patients for an average of 8 months revealed one further mortality.

CONCLUSION

Human immunodeficiency virus-positive and -exposed patients present a unique challenge in management which is complicated by concomitant disease and poor nutrition. These patients require an expanded differential diagnosis. We believe that, although on the surface there may be a higher complication rate, this needs to be confirmed in an expanded comparative cohort study, which is underway and that patients should still receive the benefit of full surgical intervention.

HIV seropositivity predicts longer duration of stay and rehospitalization among nonbacteremic febrile injection drug users with skin and soft tissue infections

BACKGROUND

Skin/soft tissue infections (SSTIs) are the leading cause of hospital admissions among injection drug users (IDUs).

METHODS

We performed a retrospective investigation to determine the epidemiology of SSTIs (ie, cellulitis and/or abscesses) in febrile IDUs, with a focus on bacteriology and potential predictors of increased health care utilization measured by longer length of stay and rehospitalization. Subjects were drawn from a cohort of febrile IDUs presenting to an inner-city emergency department from 1998 to 2004.

RESULTS

Of the 295 febrile IDUs with SSTIs, specific discharge diagnoses were cellulitis only (n = 143, 48.5%), abscesses only (n = 113, 38.3%), and both (n = 39, 13.2%). Documented HIV infection rate was 28%. Of note, 10 subjects were newly diagnosed with HIV infection during their visits. Staphylococcus aureus was the leading pathogen, and increasing rates of methicillin-resistant S. aureus emerged over time (before 2001: 4%, 2001-2004: 56%, P < 0.01). HIV seropositivity predicted rehospitalization within 90 days [adjusted hazard ratios and 95% confidence intervals: 2.90 (1.20 to 7.02)]. HIV seropositivity also predicted increased length of stay in those who were nonbacteremic [adjusted hazard ratios and 95% confidence intervals: 1.49 (1.11 to 2.01)].

CONCLUSIONS

Among febrile IDUs with SSTIs, a strong association between HIV seropositivity and health care resource utilization was found. Accordingly, attention to HIV serostatus should be considered in clinical disposition decisions for this vulnerable high-risk population.

Does HIV infection influence outcomes after trauma?

BACKGROUND

Our goal was to analyze whether the presence of human immunodeficiency virus (HIV) infection effects outcome after trauma.

METHODS

We performed a retrospective review of trauma patients from 2000 to 2005 comparing HIV-positive patients with HIV-negative patients.

RESULTS

A group of 54 HIV-positive patients were compared with 200 HIV- negative patients who were equally matched for demographics, mechanism, and injury severity. The groups had similar comorbidities except for more coagulopathy (0% vs. 3.7%, p = 0.04) and renal failure (0.5% vs. 9.3%, [p = 0.002]) in the HIV-positive group. The HIV-negative group had 9% overall complications versus 22.2% for the HIV-positive group (p = 0.02). There were more respiratory (0.5% vs. 5.6% [p = 0.03]) and renal (0% vs. 5.6% [p = 0.009]) complications in the HIV-positive group. No differences were found between the groups regarding ventilator, intensive care unit, hospital lengths of stay, or mortality. In the HIV-positive group, 34 had known CD4 counts which averaged 474.6 cells/muL +/- 457.4 cells/muL. There were eight who had a CD4 count less than 200 cells/muL of whom two had complications, and one had an infectious complication. These were not statistically different from those who had CD4 counts >/=200 cells/muL. Regression analysis did not demonstrate any difference in overall complications (p = 0.37) or infections (p = 0.38) regardless of the CD4 count.

CONCLUSION

Although HIV-infected patients suffer more complications than their noninfected counterparts, HIV does not alter the outcomes for trauma patient. HIV status should not influence management decisions for these patients regardless of the patient's CD4 count.

Intensive care in the developing world

Appropriate and sustainable intensive care practice is possible even in the resource-limited locations of sub-Saharan Africa. Data from seven sub-Saharan African countries indicates that the majority of patients served are surgical. Comparison between intensive care units is difficult due to lack of laboratory support, which precludes the severity sickness scores used internationally. Hospital mortality can be reduced by increasing nurse/patient ratios, adequate monitoring and initiating postoperative intermittent positive pressure ventilation when required. Equipment should include appropriate technology, for instance using oxygen concentrators and a ventilator not dependent on compressed gases or disposable circuits. The clinical officer anaesthetist has a major role to play in the intensive care team.

Improving outcome of human immunodeficiency virus-infected patients in a Mexican intensive care unit

BACKGROUND

In Latin America, insufficient data are available to improve local admission policies for human immunodeficiency virus (HIV) patients in the intensive care units (ICU). We undertook this study to evaluate the outcome and survival determinants of HIV patients in a Mexican ICU during three time periods.

METHODS

From December 1985 through January 2006, a clinical chart-based, retrospective study of all HIV patients admitted to the ICU was conducted. Demographic, clinical and laboratory data; disease severity score (APACHE II) and mortality were evaluated. A comprehensive database was created and data were analyzed using survival and regression models.

RESULTS

Ninety HIV patients were admitted to the ICU during the study: 16 (18%) in 1985-1992 (non-antiretroviral [ARV]-period), 21 (23%) in 1993-1996 (ARV-period), and 53 (58%) in 1996-2006 (highly active antiretroviral treatment [HAART] period). Leading reasons for admission were the need for mechanical ventilatory support (MVS, 85.5%), septic shock (23%), and non-HIV/AIDS complications (15.5%). Survival in the ICU increased from 12.5% (non-ARV period) to 57% (HAART period). Mortality during ICU stay was associated with MVS (HR: 3.2; 95% CI 1.0-10.2) and APACHE II > or =13 points (HR: 2.2; 95% CI 1.3-4.0). Use of steroids (HR: 0.4; 95% CI 0.2-0.8) and HAART (HR: 0.25; 95% CI 0.1-0.5) were associated with a lower risk of death. In multivariate analysis, septic shock was the main predictor of death in the ICU (HR: 2.4; 95% CI 1.1-5.2) and after discharge. HAART remained as a significant protective factor.

CONCLUSIONS

Overall survival in Mexican HIV patients admitted to an ICU has substantially increased in recent years. These data should encourage policies that consider HIV patients as good candidates for receiving intensive care.

Critical care in Africa

This article identifies the key challenges facing critical care practitioners in Africa. As a continent with a large proportion of the poorest countries and a plethora of unique diseases that place large demands for critical resources, the provision of care is largely in the context of severely constrained human and material resources. Diverse cultures and social norms predicate sensitivity to community values in the provision of care. Such realities demand novel approaches to the provision of critical care.

Critical care of immunocompromised patients: human immunodeficiency virus

OBJECTIVE

To describe critical illnesses that occur commonly in patients with human immunodeficiency virus (HIV) infection.

METHODS

We reviewed and summarized the literature on critical illness in HIV infection using a computerized MEDLINE search.

SUMMARY

In the last 10 yrs, our perception of HIV infection and acquired immune deficiency syndrome (AIDS) has changed from an almost uniformly fatal disease into a manageable chronic illness. Even patients with advanced immunosuppression may have prolonged survival, although usually with exacerbations and remissions, complicated by therapy-related toxicity and medical and psychiatric co-morbidity. The prevalence of opportunistic infections and the mortality have decreased considerably since early in the epidemic. The most common reason for intensive care unit admission in patients with AIDS is respiratory failure, but they are less likely to be admitted for Pneumocystis pneumonia and other HIV-associated opportunistic infections. HIV-infected persons are more likely to receive intensive care unit care for complications of end-stage liver disease and sepsis. Hepatitis C has emerged as a common cause of morbidity and mortality in patients with HIV infection. In addition, some develop life-threatening complications from antiretroviral drug toxicity and the immune reconstitution inflammatory syndrome.

Setting and organization of care for persons living with HIV/AIDS

BACKGROUND

Treating the world's 40.3 million persons currently infected with HIV/AIDS is an international responsibility that involves unprecedented organizational challenges. Key issues include whether care should be concentrated or decentralized, what type and mix of health workers are needed, and which interventions and mix of programs are best. High volume centres, case management and multi-disciplinary care have been shown to be effective for some chronic illnesses. Application of these findings to HIV/AIDS is less well understood.

OBJECTIVES

Our objective was to evaluate the association between the setting and organization of care and outcomes for people living with HIV/AIDS.

SEARCH STRATEGY

Computerized searches from January 1, 1980 to December 31, 2002 of MEDLINE, EMBASE, Dissertation Abstracts International (DAI), CINAHL, HealthStar, PsychInfo, PsychLit, Social Sciences Abstracts, and Sociological Abstracts as well as searches of meeting abstracts and relevant journals and bibliographies in articles that met inclusion criteria. Searches included articles published in English and other languages.

SELECTION CRITERIA

Articles were considered for inclusion if they were observational or experimental studies with contemporaneous comparison groups of adults and/or children currently infected with HIV/AIDS that examined the impact of the setting and/or organization of care on outcomes of mortality, opportunistic infections, use of HAART and prophylaxis, quality of life, health care utilization, and costs for patient with HIV/AIDS.

DATA COLLECTION AND ANALYSIS

Two authors independently screened abstracts to determine relevance. Full paper copies were reviewed against the inclusion criteria. The findings were extracted by both authors and compared. The 28 studies that met inclusion criteria were too disparate with respect to populations, interventions and outcomes to warrant meta-analysis.

MAIN RESULTS

Twenty-eight studies were included involving 39,776 study subjects. The studies indicated that case management strategies and higher hospital and ward volume of HIV-positive patients were associated with decreased mortality. Case management was also associated with increased receipt of ARVs. The results for multidisciplinary teams or multi-faceted treatment varied. None of the studies examined quality of life or immunological or virological outcomes. Healthcare utilization outcomes were mixed.

AUTHORS' CONCLUSIONS

Certain settings of care (i.e. high volume of HIV positive patients) and models of care (i.e. case management) may improve patient mortality and other outcomes. More detailed descriptions of care models, consistent definition of terms, and studies on innovative models suitable for developing countries are needed. There is not yet enough evidence to guide policy and clinical care in this area.

High rates of HIV in surgical patients in Soweto, South Africa: impact on resource utilisation and recommendations for HIV testing

Interactions between HIV and surgical diseases are relatively poorly described in high HIV prevalence settings. We report HIV prevalence and its associations in a prospective study of adults admitted to surgical units in Soweto, South Africa. Voluntary counselling and testing (VCT) for HIV was offered to surgical inpatients. Research nurses interviewed participants at enrolment and doctors reviewed records after discharge. In HIV-infected participants, CD4 counts and viral loads were ascertained. Of 1000 participants, 537 consented to VCT, of whom 176 (32.8%, 95% CI 28.8-36.9%) tested HIV positive. A history of tuberculosis (adjusted odds ratio (AOR) 3.0, 95% CI 1.5-6.2) or sexually transmitted infection (AOR 2.7, 95% CI 1.8-4.2) was associated with HIV infection. Diagnoses of cutaneous abscesses (OR 3.4, 95% CI 1.4-8.1) and anorectal sepsis (OR 3.1, 95% CI 1.1-9.0) were associated with HIV and indicated advanced disease. There were no differences in rates of operative procedures, wound sepsis, investigations or length of stay by HIV status. Hospital-acquired pneumonia was more common in HIV-infected participants (P=0.028). In conclusion, in this high HIV prevalence setting, resource utilisation is similar between HIV-infected and uninfected patients in surgical wards where high rates of HIV in young adults support routine HIV testing. WHO clinical staging of HIV should include anal sepsis as an indicator of advanced HIV disease.

Research governance: ethical issues

Healthcare research is haunted by a history of unethical studies in which profound harm was caused to vulnerable individuals. Official systems for gaining ethical approval for research, designed to prevent a repetition of these shameful examples, can prove bureaucratic and inflexible in practice. The core ethical principles of respect for autonomy, prevention of harm, promotion of benefit, and justice (which form the basis of professional codes of research conduct) must be applied flexibly to take account of contextual, methodological, personal and practical considerations. Ensuring that the design and conduct of all research is ethically sound is the responsibility of all involved-including researchers, research institutions, ethics review committees and regulatory bodies.

Prevalence of HIV status and CD4 counts in a surgical cohort: their relationship to clinical outcome

INTRODUCTION

HIV positivity alone as a predictor of surgical outcome has not been extensively studied in regions of high prevalence. The aim was to determine the prevalence of HIV infection in surgical patients, and compare differences in their clinical course based on their serological status and CD4 counts.

PATIENTS AND METHODS

A prospective cohort of 350 patients, enrolled over 6 weeks, were studied. HIV status was determined in all patients. HIV-positive patients had CD4 counts. Clinical details were collated with HIV data after completion of enrollment.

RESULTS

Of the 350 patients, all but 6 were black South Africans. The median age was 31 years (range, 18-82 years). There were 143 trauma and 207 non-trauma patients. The male:female ratio was 1.4:1. The overall HIV seropositivity rate was 39% (females, 46%; males, 36%). Overall, 228 patients had surgical intervention and 96 patients had drainage of sepsis. The hospital stay (HIV negative, 11.9 +/- 15.9 days; HIV positive, 11.0 +/- 15 days) and mortality (HIV positive, 3.6%; HIV negative, 3.7%) did not differ by major diagnostic category. For HIV-positive patients, the male:female ratio was 1.2:1. There were 54 trauma and 83 non-trauma patients. An operation for the drainage of a septic focus was commoner in the HIV-positive admissions. Thirty-two (24%) patients had CD4 counts less than 200 cells/mm3, (i.e. AIDS). The hospital mortality, hospital stay and severity of sepsis were not related to CD4 counts.

CONCLUSIONS

HIV status does not influence the outcome of general surgical admissions and should not influence surgical management decisions. In HIV-positive surgical patients, CD4 counts have no relation to in-hospital outcome in a heterogeneous group of surgical patients.

Ethics of HIV testing in general practice without informed consent: a case series

This case series presents two general practice cases where HIV testing occurred, or results suggestive of HIV were received, before informed consent was obtained. Bioethical and professional principles are used to explore these dilemmas.

Perspectives on Surgery in the New South Africa

Radical changes have occurred in the health care system since the democratization of South Africa in 1994, with the emphasis on improving previously neglected community-based primary health care. Because of the resultant financial constraints, funding of tertiary academic centers has been drastically cut which has compromised their proud record of service, teaching, and research excellence. Tertiary surgery has been particularly affected and now lags in the acquisition of new technologies which form an integral part of teaching and modern day practice. The acute shortage of full-time surgeons in regional public hospitals has prompted the government to fill vacancies with surgeons from foreign countries. In stark contrast, an abundance of surgeons in the relatively small private sector enjoy the benefits of the very best of First World medicine. The ultimate goal is a seamless progression of effective health care at all levels. It behooves the main role players to ensure that the high standard of training of South African doctors, which has international recognition, is maintained during this transition period.

HIV/AIDS: impact on maternal mortality at the Johannesburg Hospital, South Africa, 1995-2001

This study investigated maternal mortality at the Johannesburg Hospital, a 1100-bed academic hospital in South Africa. Patient records were assessed retrospectively over two time periods: 1995/1996 and 2000/2001. Causes of death were noted and compared with national data. The two time periods were compared to identify disease patterns and the role of anaesthesia in maternal mortality. The maternal mortality ratios were respectively 183 and 354 per 100000 live births respectively. Hypertension in pregnancy was the leading cause of mortality in 1995/1996, accounting for 10 out of the 20 deaths, but was the second most common cause in 2000/2001 (6 out of 35). HIV/AIDS-associated disease was the leading cause of mortality in 2000/2001 (42.7%, increasing from 20% in 1995/1996) with pneumonia the commonest cause of death. The statistics at this hospital were consistent with the national trend of an increasing association with HIV/AIDS. No deaths were found to be directly attributable to anaesthesia in either of the time periods. There is a need for clearer documentation of HIV status in pregnancy and antiretroviral intervention strategies must be considered.

Trauma care systems in South Africa

AIM

To provide an overview of the provision of trauma care in South Africa, a middle income country emerging into a democratic state.

METHODS

Literature review.

CONCLUSIONS

South Africa is gripped by an almost hidden epidemic of intentional and non-intentional injury, largely driven by alcohol and substance abuse, against a background of poverty and rapid urbanisation. Gross inequities exist in the provision of trauma care. Access to pre-hospital care and overloading of tertiary facilities are the major inefficiencies to be addressed. The burden of disease due to trauma presents unique opportunities for reconstruction and clinical research.

Recruitment of frail older people to research: lessons learnt through experience

BACKGROUND

With the emphasis on the need for clinical governance and evidence-based practice in the healthcare industry there is increasing pressure on researchers to provide tangible research evidence of the effectiveness of new treatments, interventions and services. Recruiting an adequate size of sample is an important factor in the success or otherwise of a study to answer the research question. Difficulty in the recruitment of older people to research is widely acknowledged. However, much can be achieved to maximize the success of this process.

AIMS OF THE PAPER

This paper describes and explores our experience of recruiting frail, older people to research, with particular emphasis on ensuring quality in the process of research related to ethical practice.

CONCLUSIONS

Recruitment of frail older people to research can be a complex process in which the awareness and integrity of the researcher is key in upholding the principle of nonexploitation. It is important not to underestimate this difficulty and to ensure that the data collection period is sufficient to recruit adequate numbers. There is a need to continue to develop and refine recruitment skills and strategies to maximize the involvement of frail older people to research while protecting their right to refuse.

The problem of informed consent in emergency medicine research

The CRASH Trial (Corticosteroid Randomisation After Significant Head injury), which started in April 1999 hopes to answer the question of whether or not there is any benefit to giving high dose corticosteroids after significant head injuries. To do this patients are randomised to receive either the standard care for head injuries, as defined by the receiving hospital, or standard care plus a 48 hour infusion of corticosteroids. This is to be started within eight hours of injury, preferably as soon as possible. As all eligible patients will have a reduced level of consciousness informed consent has been deemed unnecessary. In this review the issue of consent in human experimentation is presented with a special emphasis on the problems faced in emergency medicine research, and the way these have been tackled.

Clinical outcome of HIV positive patients with moderate to severe burns

Human immunodeficiency virus (HIV) infection is a world wide and growing problem. Little is found in the literature concerning the treatment and outcome of patients suffering from HIV infection who are treated for burns. The aim of this study was to assess whether the outcome of HIV positive patients suffering from burn wounds differed from those who do not have HIV infection. Thirty three patients formed the HIV positive study group. HIV negative controls were matched for age, degree of burns, sex and inhalation injury. The mean age of the patients was 31.6 years and the mean total body surface burn was 26.4%. There was no significant difference in the outcome of the two groups in terms of mortality or treatment parameters measured. Two patients had stigmata of AIDS (tuberculosis) and both died. One patient, with a CD4 count of 228, developed severe necrotizing fasciitis. In keeping with other studies looking at the outcome of HIV positive patients in an Intensive Care Unit setting, we concluded that a HIV positive patient, who suffers from a burn wound and has no stigmata of AIDS, should be treated similarly to a HIV negative patient.