2012 Infectious Diseases Society of America clinical practice guideline for the diagnosis and treatment of diabetic foot infections

Foot infections are a common and serious problem in persons with diabetes. Diabetic foot infections (DFIs) typically begin in a wound, most often a neuropathic ulceration. While all wounds are colonized with microorganisms, the presence of infection is defined by ≥2 classic findings of inflammation or purulence. Infections are then classified into mild (superficial and limited in size and depth), moderate (deeper or more extensive), or severe (accompanied by systemic signs or metabolic perturbations). This classification system, along with a vascular assessment, helps determine which patients should be hospitalized, which may require special imaging procedures or surgical interventions, and which will require amputation. Most DFIs are polymicrobial, with aerobic gram-positive cocci (GPC), and especially staphylococci, the most common causative organisms. Aerobic gram-negative bacilli are frequently copathogens in infections that are chronic or follow antibiotic treatment, and obligate anaerobes may be copathogens in ischemic or necrotic wounds. Wounds without evidence of soft tissue or bone infection do not require antibiotic therapy. For infected wounds, obtain a post-debridement specimen (preferably of tissue) for aerobic and anaerobic culture. Empiric antibiotic therapy can be narrowly targeted at GPC in many acutely infected patients, but those at risk for infection with antibiotic-resistant organisms or with chronic, previously treated, or severe infections usually require broader spectrum regimens. Imaging is helpful in most DFIs; plain radiographs may be sufficient, but magnetic resonance imaging is far more sensitive and specific. Osteomyelitis occurs in many diabetic patients with a foot wound and can be difficult to diagnose (optimally defined by bone culture and histology) and treat (often requiring surgical debridement or resection, and/or prolonged antibiotic therapy). Most DFIs require some surgical intervention, ranging from minor (debridement) to major (resection, amputation). Wounds must also be properly dressed and off-loaded of pressure, and patients need regular follow-up. An ischemic foot may require revascularization, and some nonresponding patients may benefit from selected adjunctive measures. Employing multidisciplinary foot teams improves outcomes. Clinicians and healthcare organizations should attempt to monitor, and thereby improve, their outcomes and processes in caring for DFIs.

Executive Summary: 2012 Infectious Diseases Society of America Clinical Practice Guideline for the Diagnosis and Treatment of Diabetic Foot Infectionsa

Foot infections are a common and serious problem in persons with diabetes. Diabetic foot infections (DFIs) typically begin in a wound, most often a neuropathic ulceration. While all wounds are colonized with microorganisms, the presence of infection is defined by ≥2 classic findings of inflammation or purulence. Infections are then classified into mild (superficial and limited in size and depth), moderate (deeper or more extensive), or severe (accompanied by systemic signs or metabolic perturbations). This classification system, along with a vascular assessment, helps determine which patients should be hospitalized, which may require special imaging procedures or surgical interventions, and which will require amputation. Most DFIs are polymicrobial, with aerobic gram-positive cocci (GPC), and especially staphylococci, the most common causative organisms. Aerobic gram-negative bacilli are frequently copathogens in infections that are chronic or follow antibiotic treatment, and obligate anaerobes may be copathogens in ischemic or necrotic wounds.

Wounds without evidence of soft tissue or bone infection do not require antibiotic therapy. For infected wounds, obtain a post-debridement specimen (preferably of tissue) for aerobic and anaerobic culture. Empiric antibiotic therapy can be narrowly targeted at GPC in many acutely infected patients, but those at risk for infection with antibiotic-resistant organisms or with chronic, previously treated, or severe infections usually require broader spectrum regimens. Imaging is helpful in most DFIs; plain radiographs may be sufficient, but magnetic resonance imaging is far more sensitive and specific. Osteomyelitis occurs in many diabetic patients with a foot wound and can be difficult to diagnose (optimally defined by bone culture and histology) and treat (often requiring surgical debridement or resection, and/or prolonged antibiotic therapy). Most DFIs require some surgical intervention, ranging from minor (debridement) to major (resection, amputation). Wounds must also be properly dressed and off-loaded of pressure, and patients need regular follow-up. An ischemic foot may require revascularization, and some nonresponding patients may benefit from selected adjunctive measures. Employing multidisciplinary foot teams improves outcomes. Clinicians and healthcare organizations should attempt to monitor, and thereby improve, their outcomes and processes in caring for DFIs.

The impact of low health literacy on surgical practice

BACKGROUND

We sought to determine the prevalence of low health literacy (LHL) among patients in a preoperative clinic, the characteristics associated with LHL, and the association between LHL and adherence to preoperative instructions.

METHODS

We conducted a cohort study and interviewed patients at a VA preoperative clinic. We administered a health literacy test and collected sociodemographic information. When patients returned for their scheduled surgical procedures, adherence to preoperative instructions was assessed.

RESULTS

Of 332 participants, 12% (n = 40) had LHL. Low health literacy was more prevalent among older adults (more than 65 years) compared with those under age 65. Patients with LHL were more likely to be nonadherent to preoperative medication instructions (odds ratio = 1.9; 95% confidence interval: 0.8 to 4.8), but this was of borderline statistical significance.

CONCLUSIONS

Low health literacy was common among older patients and appeared to be associated with lower adherence to preoperative medication instructions.

Does this coughing adolescent or adult patient have pertussis?

CONTEXT

Pertussis is often overlooked as a cause of chronic cough, especially in adolescents and adults. Several symptoms are classically thought to be suggestive of pertussis, but the diagnostic value of each of them is uncertain.

OBJECTIVE

To systematically review the evidence regarding the diagnostic value of 3 classically described symptoms of pertussis: paroxysmal cough, posttussive emesis, and inspiratory whoop.

DATA SOURCES, STUDY SELECTION, AND DATA EXTRACTION

We searched MEDLINE (January 1966-April 2010), EMBASE (January 1969 to April 2010), and the bibliographies of pertinent articles to identify relevant English-language studies. Articles were selected that included children older than 5 years, adolescents, or adults and confirmed the diagnosis of pertussis among patients with cough illness (of any duration) with an a priori-defined accepted reference standard. Two authors independently extracted data from articles that met selection criteria and resolved any discrepancies by consensus.

DATA SYNTHESIS

Five prospective studies met inclusion criteria; 3 were used in the analysis. Presence of posttussive emesis (summary likelihood ratio [LR], 1.8; 95% confidence interval [CI], 1.4-2.2) or inspiratory whoop (summary LR, 1.9; 95% CI, 1.4-2.6) increases the likelihood of pertussis. Absence of paroxysmal cough (summary LR, 0.52; 95% CI, 0.27-1.0) or posttussive emesis (summary LR, 0.58; 95% CI, 0.44-0.77) reduced the likelihood. Absence of inspiratory whoop was less useful (summary LR, 0.78; 95% CI, 0.66-0.93). No studies evaluated combinations of findings.

CONCLUSIONS

In a nonoutbreak setting, data to determine the diagnostic usefulness of symptoms classically associated with pertussis are limited and of relatively weak quality. The presence or absence of posttussive emesis or inspiratory whoop modestly change the likelihood of pertussis; therefore, clinicians must use their overall clinical impression to decide about additional testing or empirical treatment.

2012 infectious diseases society of america clinical practice guideline for the diagnosis and treatment of diabetic foot infections

Foot infections are a common and serious problem in persons with diabetes. Diabetic foot infections (DFIs) typically begin in a wound, most often a neuropathic ulceration. While all wounds are colonized with microorganisms, the presence of infection is defined by ≥2 classic findings of inflammation or purulence. Infections are then classified into mild (superficial and limited in size and depth), moderate (deeper or more extensive), or severe (accompanied by systemic signs or metabolic perturbations). This classification system, along with a vascular assessment, helps determine which patients should be hospitalized, which may require special imaging procedures or surgical interventions, and which will require amputation. Most DFIs are polymicrobial, with aerobic gram-positive cocci (GPC), and especially staphylococci, the most common causative organisms. Aerobic gram-negative bacilli are frequently copathogens in infections that are chronic or follow antibiotic treatment, and obligate anaerobes may be copathogens in ischemic or necrotic wounds. Wounds without evidence of soft tissue or bone infection do not require antibiotic therapy. For infected wounds, obtain a post-debridement specimen (preferably of tissue) for aerobic and anaerobic culture. Empiric antibiotic therapy can be narrowly targeted at GPC in many acutely infected patients, but those at risk for infection with antibiotic-resistant organisms or with chronic, previously treated, or severe infections usually require broader spectrum regimens. Imaging is helpful in most DFIs; plain radiographs may be sufficient, but magnetic resonance imaging is far more sensitive and specific. Osteomyelitis occurs in many diabetic patients with a foot wound and can be difficult to diagnose (optimally defined by bone culture and histology) and treat (often requiring surgical debridement or resection, and/or prolonged antibiotic therapy). Most DFIs require some surgical intervention, ranging from minor (debridement) to major (resection, amputation). Wounds must also be properly dressed and off-loaded of pressure, and patients need regular follow-up. An ischemic foot may require revascularization, and some nonresponding patients may benefit from selected adjunctive measures. Employing multidisciplinary foot teams improves outcomes. Clinicians and healthcare organizations should attempt to monitor, and thereby improve, their outcomes and processes in caring for DFIs.

Perioperative Evaluation and Management of Patients With Cirrhosis: Risk Assessment, Surgical Outcomes, and Future Directions

BACKGROUND AND AIMS

Patients with cirrhosis are at increased risk of perioperative morbidity and mortality. We provide a narrative review of the available data regarding perioperative morbidity and mortality, risk assessment, and management of patients with cirrhosis undergoing non-hepatic surgical procedures.

METHODS

We conducted a comprehensive review of the literature from 1998-2018 and identified 87 studies reporting perioperative outcomes in patients with cirrhosis. We extracted elements of study design and perioperative mortality by surgical procedure, Child-Turcotte-Pugh (CTP) class and Model for End-stage Liver Disease (MELD) score reported in these 87 studies to support our narrative review.

RESULTS

Overall, perioperative mortality is 2-10 times higher in patients with cirrhosis compared to patients without cirrhosis, depending on the severity of liver dysfunction. For elective procedures, patients with compensated cirrhosis (CTP class A, or MELD <10) have minimal increase in operative mortality. CTP class C patients (or MELD >15) are at high risk for mortality; liver transplantation or alternatives to surgery should be considered. Very little data exist to guide perioperative management of patients with cirrhosis, so most recommendations are based on case series and expert opinion. Existing risk calculators are inadequate.

CONCLUSIONS

Severity of liver dysfunction, medical comorbidities and the type and complexity of surgery, including whether it is elective versus emergent, are all determinants of perioperative mortality and morbidity in patients with cirrhosis. There are major limitations to the existing clinical research on risk assessment and perioperative management that warrant further investigation.

Internal Medicine Residents' Perceptions of Morning Report: a Multicenter Survey

BACKGROUND

Residents rate morning report (MR) as an essential educational activity. Little contemporary evidence exists to guide medical educators on the optimal content or most effective delivery strategies, particularly in the era of resident duty-hour limitations and shifts towards learner-centric pedagogy in graduate medical education.

OBJECTIVE

Assess resident views about MR content and teaching strategies.

DESIGN

Anonymous, online survey.

PARTICIPANTS

Internal medicine residents from 10 VA-affiliated residency programs.

MAIN MEASURES

The 20-item survey included questions on demographics; frequency and reason for attending; opinions on who should attend, who should teach, and how to prioritize the teaching; and respondents' comfort level with participating in MR. The survey included a combination of Likert-style and multiple-choice questions with the option for multiple responses.

KEY RESULTS

A total of 497 residents (46%) completed the survey, with a balanced sample of R1s (33%), R2s (35%), and R3s (31%). Self-reported MR attendance was high (31% always attend; 39% attend > 50% of the time), with clinical duties being the primary barrier to attendance (85%). Most respondents felt that medical students (89%), R1 (96%), and R2/R3s (96%) should attend MR; there was less consensus regarding including attendings (61%) or fellows (34%). Top-rated educational topics included demonstration of clinical reasoning (82%), evidence-based medicine (77%), and disease pathophysiology (53%). Respondents valued time spent on diagnostic work-up (94%), management (93%), and differential building (90%). Overall, 82% endorsed feeling comfortable speaking; fewer R1s reported comfort (76%) compared with R2s (87%) or R3s (83%, p = 0.018). Most (81%) endorsed that MR was an inclusive learning environment (81%), with no differences by level of training.

CONCLUSIONS

MR remains a highly regarded, well-attended educational conference. Residents value high-quality cases that emphasize clinical reasoning, diagnosis, and management. A supportive, engaging learning environment with expert input and concise, evidence-based teaching is desired.

Incidence and Risk Factors of Postoperative Mortality and Morbidity After Elective Versus Emergent Abdominal Surgery in a National Sample of 8193 Patients With Cirrhosis

OBJECTIVE

To describe the incidence and risk factors for mortality and morbidity in patients with cirrhosis undergoing elective or emergent abdominal surgeries.

BACKGROUND

Postoperative morbidity and mortality are higher in patients with cirrhosis; variation by surgical procedure type and cirrhosis severity remain unclear.

METHODS

We analyzed prospectively-collected data from the Veterans Affairs (VA) Surgical Quality Improvement Program for 8193 patients with cirrhosis, 864 noncirrhotic controls with chronic hepatitis B infection, and 5468 noncirrhotic controls without chronic liver disease, who underwent abdominal surgery from 2001 to 2017. Data were analyzed using random-effects models controlling for potential confounders.

RESULTS

Patients with cirrhosis had significantly higher 30-day mortality than noncirrhotic patients with chronic hepatitis B [4.4% vs 1.3%, adjusted odds ratio (aOR) 2.80, 95% confidence interval (CI) 1.57-4.98] or with no chronic liver disease (0.8%, aOR 4.68, 95% CI 3.27-6.69); mortality difference was highest in patients with Model for End-stage Liver Disease (MELD) score ≥10. Among patients with cirrhosis, postoperative mortality was almost 6 times higher after emergent rather than elective surgery (17.2% vs. 2.1%, aOR 5.82, 95% CI 4.66-7.27). For elective surgeries, 30-day mortality was highest after colorectal resection (7.0%) and lowest after inguinal hernia repair (0.6%). Predictors of postoperative mortality included cirrhosis-related characteristics (high MELD score, low serum albumin, ascites, encephalopathy), surgery-related characteristics (emergent vs elective, type of surgery, intraoperative blood transfusion), comorbidities (chronic obstructive pulmonary disease, cancer, sepsis, ventilator dependence, functional status), and age.

CONCLUSIONS

Accurate preoperative risk assessments in patients with cirrhosis should account for cirrhosis severity, comorbidities, type of procedure, and whether the procedure is emergent versus elective.

The microbiology of bacteriuria in men: a 5-year study at a Veterans' Affairs hospital

Bacteriuria and urinary tract infection occur relatively frequently in older men, but data regarding the causative microorganisms are limited. We retrospectively identified all positive cultures of urine specimens (n = 4943) obtained over a 5-year period at our institution. We determined the frequency of causative microorganisms and grouped these by Gram type, setting of patient care, and method of urine specimen collection. We also assessed the performance characteristics of the Gram-stained smear of uncentrifuged urine. Among our patients, Gram-positive cocci (GPC) were isolated as often as Gram-negative rods (GNR). Escherichia coli was the single or predominant isolate in only 14% of cases, and Enterococcus was the single most commonly identified genus (22.5%). The Gram stain was accurate in predicting the culture results (positive likelihood ratio, 7.0 for GPC and 8.1 for GNR). We conclude that the microorganisms causing bacteriuria in older male veterans are substantially different from those found in women, and the Gram-stained smear provides useful information on the causative organisms.

What internal medicine attendings talk about at morning report: a multicenter study

BACKGROUND

Morning report is a core educational activity in internal medicine resident education. Attending physicians regularly participate in morning report and influence the learning environment, though no previous study has described the contribution of attending physicians to this conference. This study aims to describe attending comments at internal medicine morning reports.

METHODS

We conducted a prospective, observational study of morning reports conducted at 13 internal medicine residency programs between September 1, 2020, and March 30, 2021. Each attending comment was described including its duration, whether the comment was teaching or non-teaching, teaching topic, and field of practice of the commenter. We also recorded morning report-related variables including number of learners, report format, program director participation, and whether report was scripted (facilitator has advance knowledge of the case). A regression model was developed to describe variables associated with the number of attending comments per report.

RESULTS

There were 2,344 attending comments during 250 conferences. The median number of attendings present was 3 (IQR, 2-5). The number of comments per report ranged across different sites from 3.9 to 16.8 with a mean of 9.4 comments/report (SD, 7.4). 66% of comments were shorter than one minute in duration and 73% were categorized as teaching by observers. The most common subjects of teaching comments were differential diagnosis, management, and testing. Report duration, number of general internists, unscripted reports, and in-person format were associated with significantly increased number of attending comments.

CONCLUSIONS

Attending comments in morning report were generally brief, focused on clinical teaching, and covered a wide range of topics. There were substantial differences between programs in terms of the number of comments and their duration which likely affects the local learning environment. Morning report stakeholders that are interested in increasing attending involvement in morning report should consider employing in-person and unscripted reports. Additional studies are needed to explore best practice models of attending participation in morning report.

Internal Medicine Residents' Perceptions of Virtual Morning Report: a Multicenter Survey

IMPORTANCE

The COVID-19 pandemic disrupted graduate medical education, compelling training programs to abruptly transition to virtual educational formats despite minimal experience or proficiency. We surveyed residents from a national sample of internal medicine (IM) residency programs to describe their experiences with the transition to virtual morning report (MR), a highly valued core educational conference.

OBJECTIVE

Assess resident views about virtual MR content and teaching strategies during the COVID-19 pandemic.

DESIGN

Anonymous, web-based survey.

PARTICIPANTS

Residents from 14 academically affiliated IM residency programs.

MAIN MEASURES

The 25-item survey on virtual MR included questions on demographics; frequency and reason for attending; opinions on who should attend and teach; how the virtual format affects the learning environment; how virtual MR compares to in-person MR with regard to participation, engagement, and overall education; and whether virtual MR should continue after in-person conferences can safely resume. The survey included a combination of Likert-style, multiple option, and open-ended questions.

RESULTS

Six hundred fifteen residents (35%) completed the survey, with a balanced sample of interns (39%), second-year (31%), and third-year (30%) residents. When comparing their overall assessment of in-person and virtual MR formats, 42% of residents preferred in-person, 18% preferred virtual, and 40% felt they were equivalent. Most respondents endorsed better peer-engagement, camaraderie, and group participation with in-person MR. Chat boxes, video participation, audience response systems, and smart boards/tablets enhanced respondents' educational experience during virtual MR. Most respondents (72%) felt that the option of virtual MR should continue when it is safe to resume in-person conferences.

CONCLUSIONS

Virtual MR was a valued alternative to traditional in-person MR during the COVID-19 pandemic. Residents feel that the virtual platform offers unique educational benefits independent of and in conjunction with in-person conferences. Residents support the integration of a virtual platform into the delivery of MR in the future.

Risk factors for adverse outcomes in emergency versus nonemergency open umbilical hernia repair and opportunities for elective repair in a national cohort of patients with cirrhosis

BACKGROUND

Whether to perform umbilical hernia repair in patients with cirrhosis is a common dilemma for surgeons. We aimed to determine the incidence, morbidity, and mortality associated with emergency and nonemergency umbilical hernia repair in patients with and without cirrhosis, and to explore opportunities for nonemergency repair.

METHODS

Veterans diagnosed with cirrhosis between 2001 and 2014 and a frequency-matched sample of veterans without cirrhosis were followed through September 2017. Veterans Affairs Surgical Quality Improvement Program data provided outcomes and risk factors for mortality after umbilical hernia repair. We performed chart review of a random sample of patients undergoing emergency umbilical hernia repair.

RESULTS

Among 119,605 veterans with cirrhosis and 118,125 matched veterans without cirrhosis, the Veterans Affairs Surgical Quality Improvement Program database included 1,475 and 552 open umbilical hernia repairs, respectively. In patients with cirrhosis, 30-day mortality was 1.2% after nonemergency umbilical hernia repair and 12.2% after emergency umbilical hernia repair, contrasting with zero deaths in patients without cirrhosis undergoing these repairs. In patients with cirrhosis but no ascites in the prior month, 30-day mortality after nonemergency umbilical hernia repair was 0.7%, compared to 2.2% in those with ascites. Chart review of patients requiring emergency umbilical hernia repair revealed that elective umbilical hernia repair may have been feasible in 30% of these patients in the prior year; fewer than half of those undergoing emergency umbilical hernia repair had received a general surgery consultation in the prior 2 years.

CONCLUSIONS

Nonemergency open umbilical hernia repair was associated with relatively low perioperative mortality in patients with cirrhosis and no recent ascites. About 30% of patients undergoing emergency umbilical hernia repair may have been candidates for nonemergency repair in the prior year.

Virtual Interactive Case-Based Education (VICE): A Conference for Deliberate Practice of Diagnostic Reasoning

INTRODUCTION

Current approaches to teaching diagnostic reasoning minimally address the need for deliberate practice. We developed an educational conference for internal medicine residents to practice diagnostic reasoning and examine how biases affect their differential diagnoses through cognitive autopsies.

METHODS

We formatted the Virtual Interactive Case-Based Education (VICE) conference as a clinical problem-solving exercise, in which a facilitator presents a case to a single discussant selected from the audience. We delivered VICE on an internet-based conferencing platform with screen-sharing capability over approximately 30 minutes. To maximize learners' psychological safety, we employed an active facilitation model that normalized uncertainty and prioritized the diagnostic process over arriving at the correct diagnosis.

RESULTS

Resident attitudes toward VICE were assessed by utilizing a postconference survey and gathering descriptive data for 11 sessions. Ninety-seven percent of respondents (n = 35) felt that VICE was a novel and valuable addition to their curriculum. Qualitative data suggested that positive features of the conference included the opportunity to practice diagnostic reasoning, the single-discussant format, and the supportive learning environment. Discussants reported that holding the conference in person would have negatively impacted their experience.

DISCUSSION

Internal medicine residents universally valued the opportunity to engage in deliberate practice of case-based reasoning in a psychologically safe environment during the VICE conference. The virtual nature of the conference contributed significantly to discussants' positive experience. This resource includes all materials necessary to implement VICE, as well as an instructional video on facilitation.

Male hormonal contraception

Although women have traditionally shouldered the responsibility of contraception, up to a third of couples worldwide employ a male form of contraception (e.g., condoms or vasectomy). Some women are unable to use hormonal contraception; vasectomy is best considered irreversible; and long-term use of condoms is associated with a relatively high failure rate (pregnancy). Thus, a need exists for a safe, effective, reversible, well-tolerated male hormonal contraceptive agent. Two large multi-centre, multi-national trials sponsored by the World Health Organization in the 1990s showed that high-dosage exogenous testosterone provided contraceptive efficacy similar to existing female oral contraceptives. However, the supraphysiological dosages of testosterone used resulted in androgen-related adverse effects such as weight gain and suppression of high-density lipoprotein cholesterol levels. Subsequent efforts have been directed at combining testosterone with other agents, such as progestogens or gonadotropin-releasing hormone analogues, to decrease the dosage of testosterone (and thus androgen-related side effects) while achieving uniform azoospermia. This review discusses the latest developments in male hormonal contraception.