A Descriptive Study on the Clinical Profile and Outcomes of Patients with COVID-19 and Tuberculosis Co-infection.

Background: Tuberculosis (TB) control has been a challenge in the country and its overall health impact remains significant. COVID-19 has caused significant morbidity and mortality especially among hospitalized patients. TB and COVID-19 co-infection (COVID-TB) may cause more catastrophic consequences and outcomes among afflicted individuals and management may be daunting. There is limited local data on COVID-TB. Objectives: The clinical profile of COVID-TB patients who were admitted were described. Comparison of the clinical outcomes was also done versus the general admitted COVID-19 patients without concomitant TB in the same institution. Relevant patient outcomes were reported which included admission to an intensive care unit (ICU), length of hospital stay, and mortality rate. Methods: This is a descriptive study on the demographics and clinical outcomes of patients admitted in the Philippine General Hospital (PGH) for COVID-19 with TB co-infection from March 2020 to September 2020. We aimed to characterize patients with COVID-TB and analyzed their outcomes. Results: There was a total of 79 patients who were admitted for COVID-19 (confirmed with RT-PCR) with TB co-infection during the study period. Majority of them were males (70.9%) with a median age of 54 (IQR 42 to 64) years. In terms of TB affliction, 75 (94.9%) patients were identified to have pulmonary tuberculosis. Majority of patients had at least one co-morbid illness with hypertension (16.5%), diabetes mellitus (13.9%), and heart failure (11.4%) as the most common. Respiratory symptoms (dyspnea and cough) were the predominant presenting complaint during hospital admission. Majority of the patients were classified as severe (8 or 10.1%) and critical (36 or 45.57%) COVID-19 disease. Fifty-six (70.9%) were bacteriologically confirmed tuberculosis. Radiologic imaging studies revealed findings consistent with pulmonary tuberculosis in 70 (88.61%) through plain radiograph. Forty-seven underwent HRCT and 46 of these (97.8%) had findings suggestive of PTB. Overall, 61 patients (77%) subsequently required oxygen supplementation. The in-hospital mortality within the study population was 36.7% (29/79) in contrast to the general COVID patients admitted in the same period which revealed significantly less fatality at 17.5% (35/200). The length of hospital stay was found to be 21.1 days ± 14.75 days across all study patients, and with median of 20 days for surviving patients. TB treatment outcomes were tracked in the 50 surviving COVID-19 patients where cure was declared in 8/50 (16%) while 22/50 (44%) successfully completed their six-month treatment regimen. Conclusions: This study of COVID-TB provides an initial evaluation of the potential association between active TB infection and COVID-19 severity and mortality. The data generated from this study may be a starting point to assess the interaction of these two diseases. Furthermore, bidirectional screening may be recommended even at hospitals' triage areas since both diseases may have similar presentations.

Characteristics and outcomes of COVID-19 patients admitted in the medical ICU of a tertiary public hospital in the Philippines during the first two months of being a COVID-19 referral center

@#Introduction. The University of the Philippines-Philippine General Hospital (UP-PGH) began its operations as a COVID-19 referral center on March 30, 2020. Local studies reporting characteristics of patients in the intensive care units (ICUs) are lacking. Objectives. 1) To describe the baseline characteristics and outcomes of the initial cohort of COVID-19 patients in the medical ICU. 2) To report the initial situation and strategies in the ICU during the first two months of being a COVID-19 referral center. Methods. We conducted a review of records of all patients with confirmed COVID-19 admitted to the medical ICU of UP-PGH between April 1 to May 31, 2020. Patient demographics, comorbidities, APACHE-II score, signs and symptoms, laboratory and radiologic results, respiratory and vasopressor support, and outcomes were collected. Results. Out of 35 patients with confirmed COVID-19, majority were above 60 years old (63%). Hypertension was the most frequent comorbidity (77%). Fever was the most common symptom (51%). The mean duration of symptoms prior admission was 9 ± 7 days. Anemia and leukocytosis with neutrophilia was common. Lactate dehydrogenase (LDH) and high-sensitivity C-reactive protein (HSCRP) were elevated in most patients. Majority of patients (66%) had moderate level of hypoxemia on admission. Bilateral pneumonia on chest radiograph was found in 34 patients. Hydroxychloroquine and chloroquine were the most commonly used drugs. A total of 24 patients (69%) required invasive mechanical ventilation while 15 (43%) needed pressor support. Twenty-two expired (63%) while thirteen (37%) patients were discharged from the medical ICU. Conclusion. The clinical characteristics in our set of patients are consistent with other studies on critically ill patients. Mortality in the medical ICU was high.

Inhalation injury: A two-year pilot assessment on the adherence to the clinical pathway for adult burn patients at high risk for inhalation injury in the Philippine General Hospital

OBJECTIVE@#This study determined the mean overall adherence to the clinical pathway formulated by the Section of Pulmonology together with the Division of Burns for adult burn patients at high risk for inhalation injury admitted at the UP-PGH ATR Burn Center in a two-year period@*METHODOLOGY@#A retrospective cohort study regarding adherence to the clinical pathway of acutely burned adult patients at high risk for inhalation injury admitted at the UP-PGH ATR Burn Center between August 2016 to July 2018 was conducted. Medical records were reviewed and an adherence checklist was used to assess each item in the clinical pathway. For the adherence and patient profile, descriptive statistics were used.@*RESULTS@#This pilot assessment study showed acceptable rates of adherence and implementation of the clinical pathway. Overall, 60% of the cases followed the clinical pathway completely. While 26.67% had acceptable rates of compliance (more than half of items adhered), while 13% of the cases scored adhered to less than half of the items.@*CONCLUSION@#The pathway has been shown to be a feasible clinical pathway that can be implemented in a tertiary hospital setting.

Balanced Crystalloids versus Normal Saline as Intravenous Fluid Therapy among Critically Ill patients: A meta-analysis of randomized controlled trials

Introduction@#Recent studies on critically ill adults has shown that use of normal saline with its supraphysiologic chloride content has been associated with an increased incidence of hyperchloremic metabolic acidosis, acute kidney injury (AKI), renal replacement therapy (RRT), hypotension and death. The objective of this meta-analysis was to assess the clinical outcomes associated with the use of balanced crystalloids versus normal saline solution.@*Methods@#We searched PubMed/MEDLINE, Embase and Cochrane Library (CENTRAL) databases in accordance with PRISMA guidelines. Our inclusion criteria were the following: randomized controlled trials, adult critically ill patients, comparisons between patients receiving either balanced crystalloids (lactated ringer’s solution, plasma-lyte) or normal saline, and at least one endpoint that measure intensive care unit mortality, risk of AKI (defined as stage 2 or greater in the RIFLE criteria) and risk of RRT. Risk ratios (RRs) and confidence intervals (C.I) were calculated via Review Manager Version 5.3 using the fixed-effect modelling.@*Results@#A total of four randomized controlled trials, which were all assessed to be good quality and low risk of bias, with 19,105 patients were included. Use of balanced crystalloids showed a trend towards lower incidence of AKI (RR 0.94, 95% C.I [0.87-1.02], P=0.69), RRT use (RR 0.91, 95% C.I. [0.771.07], P=0.29) and ICU mortality (RR 0.91, 95% C.I. [0.82-1.01], P=0.95). There is no significant heterogeneity identified.@*Conclusion@#Use of balanced crystalloids as intravenous fluid therapy among critically ill patients demonstrated a trend toward lower incidence of AKI, RRT and ICU mortality, compared to normal saline solution.

Safety and efficacy of cefpirome among Filipino patients

BACKGROUND: Infectious diseases remain a significant cause of morbidity and mortality. Cefpirome, a fourth generation Cephalosporin, is a potent antibiotic against a wide variety of organisms that may be used alone or in combination with other antimicrobials to combat various infections. OBJECTIVE: This is a post-marketing surveillance study documenting the safety and efficacy of cefpirome among Filipino patients. METHODOLOGY: This was a multicenter, open-label, noncomparative study involving 402 patients who received at least one dose of cefpirome. Safety and efficacy data were gathered. RESULTS: Cefpirome was used as monotherapy in majority of the cases. Pneumonia (76%) was the most frequent indication for the use of this drug. The most commonly utilized dosage regimen was 2.0 grams every 12 hours for a mean of 4.2 days. This was associated with a successful clinical outcome in almost 90% of cases. There was almost negligible side effect reported. CONCLUSION: The use of cefpirome was shown to be safe and well-tolerated with associated successful clinical outcomes among Filipino patients. 

Prevalence of anxiety and depression among Filipino patients with chronic obstructive pulmonary disease: A multi-center study

BACKGROUND: One under-explored area in chronic obstructive pulmonary disease (COPD) patients is anxiety and/or depression, which may have negative impact in the patients' condition. This is possibly the first study to possibly assess the burden of anxiety and depression in COPD patients in the Philippines. STUDY DESIGN: This is a prospective descriptive survey in three tertiary care hospitals in Manila, Philippines. PARTICIPANTS: A total of 204 patients were enrolled in the study with the following inclusion criteria: Filipino patients who are aged more than or equal to 40 years with a diagnosis of COPD (documented post-bronchodilator FEV1/FVC ratio less than 0.7) by a physician seen at the outpatient clinics of three tertiary care hospitals with no primary diagnosis of asthma, no previous lung volume reduction surgery, lung transplantation or pneumonectomy and at least finished Grade 2 education. Exclusion criteria include pregnant patients and patients previously diagnosed to have an anxiety, depression, or on any anti-depressant medications. METHODS: Descriptive statistics was obtained with frequency and percentages of the demographic and physiologic variables in the study by tabulation and graph. The prevalence of anxiety and depression was determined by calculating the percentage of each patient with a score of 8 or higher on the Hospital Anxiety and Depression Scale (HADS) with validated Tagalog version, respectively. RESULTS: The prevalence of anxiety in Filipino COPD patients is 47.55%. The prevalence of depression in Filipino COPD patients is 31.37%. CONCLUSION: The prevalence of depression in Filipino COPD patients is comparable to the prevalence of depression from other general medical conditions nationwide according to the study of Batar (31.37% vs. 31%). Anxiety is slightly more prevalent in COPD from other general medical conditions (47.55% vs. 36%). A study on the risk factors of anxiety and depression among Filipino COPD patients is recommended.

A survey of knowledge, attitudes and practices of sedation and analgesia among medical residents and pulmonary fellows-in-training at the University of the Philippines-Philippine General Hospital

BACKGROUND: Providing sedation and analgesia for patients especially in the intensive care units remains difficult and controversial for clinicians and many institutions.OBJECTIVE: The purpose of this study is to describe the knowledge, attitudes and practices on sedation and analgesia among medical residents and pulmonary fellows-in-training in a tertiary care hospital.METHODS: The research design is a prospective descriptive survey of 67 participants.RESULTS: Midazolam is the preferred sedative agent for continuous infusion. The top two reasons why sedation is used according to the knowledge of the study participants were agitation and patient comfort. Monitoring neurologic status is the primary reason why sedation is not used. Majority of the medical residents said that 50% of the mechanically ventilated patients require continuous intravenous sedation. On the other hand, pulmonary fellows-in-training said that 50-75% of mechanically ventilated patients require continuous intravenous sedation. Twenty three participants (34.32%) have used a sedation scale, of which majority uses Ramsay Sedation Scale. Morphine is the preferred analgesic agents of the study participants. Unavailability of analgesic agents is the top reason why analgesia is not used.CONCLUSION AND RECOMMENDATION: The medical residents and pulmonary fellows-in-training showed differences inknowledge, attitudes and practices with regard to use of sedation and analgesia. To increase their knowledge and improve their practice, they should be given medical education and training in sedation and analgesia.

Screening for diabetes mellitus in patients diagnosed with pulmonary tuberculosis

BACKGROUND: The epidemic of diabetes mellitus (DM) poses a threat for global tuberculosis (TB) control.   OBJECTIVE: This study attempts to assess the value of screening for diabetes in patients with pulmonary tuberculosis and reviews the disease burden, clinical and radiographic manifestations,rates of sputum smear positivity and time to conversion,treatment outcomes and fatality rates,in the local setting.METHODS: This is a prospective observational cohort study involving adults diagnosed with pulmonary tuberculosis at the PTSI TB DOTS out-patient clinic, regardless of sputum-smear status, from July 2011-November 2012. A diabetes screening tool was used and patients were screened for presence of DM. Treatment outcomes were also determined.RESULTS: Of the 38 patients enrolled, seven (18.4%,95% confidence interval 7.7-34.3) were diagnosed with DM. This is higher than the estimated 12.9% in 2010 and 14.4% projected estimate in 2030 in our country by a report of WHO as well as in reported prevalence of DM among patients with PTB in large studies done in China (12.4%) and India (13%). There was no significant difference noted in the basic profile,clinical and radiographic presentation,sputum conversion and treatment outcomes among patients with DM and without DM who were being treated for PTB.CONCLUSION: This study demonstrates the value and feasibility of screening for DM among patients with PTB. Although the findings of this study are consistent with most of previous similar studies, the estimate on the true prevalence of DM may not be very accurate because of the small sample size. Hence,a multi-center study with a larger sample size must be conducted to more accurately measure the true prevalence of DM among patients with TB and to determine associations of various clinical and radiographic presentations and clinical outcomes.

Complications of upper cervical spine trauma in elderly subjects. A systematic review of the literature.

UNLABELLED: The frequency of cervical spine trauma in elderly patients is increasing with most injuries occurring in the upper cervical spine. These fractures are associated with a risk of sometimes life-threatening complications, although very few studies have specifically analyzed this. The goal of this study was to identify the incidence of complications in the literature (mortality and morbidity) following upper cervical spine trauma in elderly patients. METHODS: A systematic search was performed on the MEDLINE database without limiting the search by language or date to identify all studies reporting the rate of complications after upper cervical spine trauma in patients over the age of 60. RESULTS: Twenty-four observational studies were included, four were comparative. These studies included a total of 857 patients, mean age 76. Nearly all traumas were odontoid process fractures, and most were treated surgically (57%). The median mortality rate was 9.2% (Q1-Q3: 2.5-19.6) and the median rate of short-term complications was 15.4% (Q1-Q3: 5.8-26.9). The main late stage complication was nonunion, which developed in a mean 10 to 12% depending on the type of treatment. CONCLUSION: Complications following cervical spine trauma are frequent in elderly patients whatever the type of treatment. Knowledge of the rate of complications in the literature and the potential risk factors is essential for the clinician to improve the information provided to patients and to prevent complications. TYPE OF STUDY: Systematic review of the literature. Level of evidence IV.

Treatment outcomes of patients with superior vena cava syndrome who received high dose radiotherapy at UP - PGH from 2009 - 2011

BACKGROUND: 85% of cases of Superior Vena Cava Obstruction (SVCO) are caused by malignancy. Radiation therapy (RT) is an effective therapeutic modality for SVCO localized in the thorax, especially for obstructive causes. OBJECTIVE: To determine the clinical profile and outcomes of patients who received radiation treatment at UP-PGH from January 1, 2009 - December 31, 2001. METHODS: Records of patients with SVCO were reviewed. The patient's demographic profiles were collected. Outcomes were labaled as recovered, improved, not improved and died based on standard definitions. STUDY DESIGN: Retrospective, descriptive study. STUDY SETTING: Philippine General Hospital STUDY POPULATION: UP-PGH patients with SVCO from 2009-2011. RESULTS: The majority of the referrals were from general medicine (50%) and the most common symptom was dyspnea (73%); however, it took the patients 2-4 weeks from the onset of symptoms to seek consult. 36% of patients had lung adenocarcinoma with disseminated disease at diagnosis. The majority (73%) showed symptomatic response after receiving the SVC dose. CONCLUSION: The importance of multidisciplinary approach to patient care cannot be overemphasized. Improvement in signs and symptoms, particularly with that of dyspnea, was noted in 72.5% of patients after receiving radiation therapy. Of the 8 patients who followed up for completion therapy, 5/8 of them reported significant improvement.

Direct observation of domain-wall configurations transformed by spin currents.

Direct observations of current-induced domain-wall propagation by spin-polarized scanning electron microscopy are reported. Current pulses move head-to-head as well as tail-to-tail walls in submicrometer Fe20Ni80 wires in the direction of the electron flow, and a decay of the wall velocity with the number of injected current pulses is observed. High-resolution images of the domain walls reveal that the wall spin structure is transformed from a vortex to a transverse configuration with subsequent pulse injections. The change in spin structure is directly correlated with the decay of the velocity.

Recurrent Pseudomonas aeruginosa pneumonia in ventilated patients: relapse or reinfection?

A prospective observational study was performed to determine whether recurrent episodes of pneumonia caused by Pseudomonas aeruginosa in ventilated patients were due to a relapse of the previous clone or to reinfection with a new one. Diagnosis was based on quantitative cultures of secretions obtained by bronchoscopy. Comparison of strains was made by chromosomal fingerprinting based on pulsed field gel electrophoresis (PFGE). Thirty-three (89.1%) of 37 patients survived the initial week after pneumonia diagnosis; six survivors (18.1%) had multiple episodes caused by the same species. Presence of adult respiratory distress syndrome (83.3% versus 22.2%, p = 0.02) was the only factor significantly associated with clinical recurrences. The 16 isolates from five patients (nine recurrences) were analyzed by PFGE. All new isolates from recurrent episodes, excepting one, were considered as relapses. These data suggest that most recurrent episodes of P. aeruginosa pneumonia in ventilated patients occur due to persistence of strains present in a prior infection.

Survival in patients with nosocomial pneumonia: impact of the severity of illness and the etiologic agent.

OBJECTIVE: To assess the impact of severity of illness at different times, using the Mortality Probability Models (MPM II), and the impact of etiologic agent on survival in patients with nosocomial pneumonia. DESIGN: Retrospective, observational study. SETTING: Fourteen-bed medical-surgical intensive care unit (ICU) in a teaching hospital. PATIENTS: Sixty-two patients with nosocomial pneumonia who were receiving early appropriate antibiotic treatment. INTERVENTIONS: None. MEASUREMENTS AND MAIN RESULTS: Severity of illness at the time of admission to the ICU (M0), 24 hrs after admission (M24), and at the time of pneumonia diagnosis (M1) was determined using MPM II. Bacteriology was established by quantitative cultures from bronchoscopic samples. The outcome measure was the crude mortality rate. The crude mortality rate in the ICU was 59.7%, compared with average predicted mortality rates of 43.5% (M0), 36.4% (M24), and 52.2% (M1). We observed significant differences in mean MPM II determinations between survivors and nonsurvivors at M1 (39.3% vs. 60.9%, p = .001) but not at M0 and M24. In the univariate analysis, the variables most predictive of mortality were the presence of coma (p = .02), inotropic medication use (p = .001), and an MPM II determination of > 50% (p = .001) when pneumonia was diagnosed (M1). Multivariate analysis showed that, in the absence of Pseudomonas aeruginosa, an MPM II determination of > 50% at M1 was associated with a relative risk of death of 4.8. The presence of P. aeruginosa was associated with an increase in the risk of death of 2.6 and 6.36 in both populations with MPM II determinations at M1 of < or = 50% and > 50%, respectively. CONCLUSIONS: Severity of illness when pneumonia is diagnosed is the most important predictor of survival, and this determination should be used for therapeutic and prognostic stratification. In addition, the presence of P. aeruginosa contributed to an excess of mortality that could not be measured by MPM II alone, suggesting the importance of the pathogen in prognosis.

Specific problems of arterial, Swan-Ganz, and hemodialysis catheters.

In our experience, the incidence and pathogenesis of colonization may vary in different types of catheters. Arterial, Swan-Ganz, and hemodialysis catheters are good examples of this problem. This observation has implications for diagnosis, and the best method for each type of catheter may not be the same. In our opinion, laboratory diagnosis in daily practice should be limited to external surface cultures of the tip of intravascular catheters. Intraluminal cultures should be limited to research purposes, except in catheters used for parenteral nutrition or hemodialysis. In this case, the intradermal segment gives more sensitive information. Sensitivity in diagnosing pulmonary artery colonization can be improved by evaluating both the tip and intradermal segments. In presence of an indwelling introducer the intradermal segment should be replaced by the introducer tip.

Evaluation of outcome for intubated patients with pneumonia due to Pseudomonas aeruginosa.

Thirty consecutively intubated patients with pneumonia due to Pseudomonas aeruginosa (cases) were prospectively observed to establish the attributable mortality rate and the prognostic value of APACHE (Acute Physiological and Chronic Health Evaluation) II scores. Four cases did not receive accurate empirical therapy and were excluded from the study. APACHE II scores were calculated within 24 hours of admission (T0), at the time of the diagnosis of pneumonia (T1), and after 72 hours of therapy (T2). The outcomes for these cases (n = 26) were compared with those for matched controls (n = 52) without pneumonia. Six cases died of causes directly related to pneumonia (group D). Two cases whose conditions clinically improved died of cardiac complications, and 18 cases had clinical resolution (group R); however, only 15 of these cases were alive at discharge. The mean APACHE II score at admission was similar (P > .20) for group R, group D, and controls. In contrast, the mean score at T1 (15.40 +/- 6.07 vs. 20.83 +/- 4.66; P < .05) and the mean score at T2 (10.40 +/- 3.57 vs. 25.50 +/- 3.93; P < .01) differed significantly for groups R and D, respectively. The overall observed and predicted mortality rates among cases and controls were 42.3% and 28.1% and 28.8% and 28.7%, respectively, while the attributable mortality rate among cases was estimated to be 13.5% (95% confidence interval, 1.95%-25.04%). We conclude that the attributable mortality rate among intubated patients with pneumonia due to P. aeruginosa is high. The APACHE II score at admission is not useful as a prognostic factor, while progression of organ dysfunction after the onset of pneumonia is an ominous sign.

Antimicrobial use in patients with positive intravascular catheter cultures: a six-month prospective survey in a teaching hospital.

Review of medical records revealed that, of 190 intravascular catheters sent for culture during the study period, 50 were positive. Of these 50, 11 (22%) were sent for culture as a routine procedure without special clinical indications. Of the remaining 39 cultures, only 11 (28%) had clinical impact in the patient's management. Ten of the 50 therapeutic interventions were inappropriate. Restricting cultures to patients who may have catheter-related infection is likely to lead to significant cost savings.

Severe community-acquired pneumonia in the elderly: epidemiology and prognosis. Study Group for Severe Community-Acquired Pneumonia.

Ninety-five patients with severe community-acquired pneumonia (SCAP) who were > or = 65 years of age were studied prospectively. A definite pathogen was identified in 37 cases (38.9%) and was most commonly Streptococcus pneumoniae, Haemophilus influenzae, or another gram-negative bacillus. The overall death rate was 40%. Eighty-three patients required mechanical ventilation and 40 needed vasoactive drugs. Multivariate analysis showed that the risk of death was higher in cases involving rapid radiological spread (relative risk [RR] = 6.99; 95% confidence interval (95% CI) = 1.54-31.70), shock (RR = 6.70; 95% CI = 2.13-21.02), previous steroid treatment or immunosuppression (RR = 5.50; 95% CI = 0.77-39.10), acute renal failure (RR = 3.88; 95% CI = 1.30-11.59), or an APACHE II score of > 22 on admission (RR = 2.25; 95% CI = 0.73-6.95). We conclude that SCAP in elderly patients is associated with high mortality, but it is inappropriate to withhold intensive care on account of age. The presence of complications and the severity of illness at initial presentation were the major variables affecting outcome. Except for immunosuppression, comorbidities did not seem to influence outcome. Finally, our data reinforce the current American Thoracic Society guidelines concerning therapy for patients with SCAP.

Pneumonia in intubated patients: role of respiratory airway care.

In order to assess potential risk factors for pneumonia within the first 8 d of ventilation, we studied 83 consecutive intubated patients undergoing continuous aspiration of subglottic secretions (CASS). Multivariate analysis showed the protective effect of antibiotic use (relative risk [RR] = 0.10; 95% confidence interval [CI] = 0.01 to 0.71), whereas failure of the CASS technique (RR = 5.29; 95% CI = 1.24 to 22.64) was associated with a greater risk of pneumonia. In addition, there was a trend toward a higher risk of pneumonia (RR = 2.57; 95% CI = 0.78 to 8.03) among patients with persistent intracuff pressures below 20 cm H2O. The remaining factors analyzed were not significant. Failure of CASS did not influence the development of pneumonia among patients undergoing antibiotic treatment (33.0% versus 38.5%, p > 0.20), but was strongly associated with pneumonia (42.1% versus 8.3%, p < 0.01) among intubated patients not receiving antibiotics. When multivariate analysis was repeated in this subpopulation, failure of CASS (RR = 7.52, 95% CI = 1.48 to 38.07) and persistent intracuff pressure below 20 cm H2O (RR = 4.23, 95% CI = 1.12 to 15.92) were factors independently associated with the development of pneumonia. We conclude that leakage of colonized subglottic secretions around the cuff of the endotracheal tube is the most important risk factor for pneumonia within the first 8 d of intubation. This study confirms the importance of maintaining adequate intracuff pressure and effective aspiration of subglottic secretions in preventing pneumonia in intubated patients not receiving antibiotic treatment.

Lower respiratory tract infections following cardiac arrest and cardiopulmonary resuscitation.

All episodes of lower respiratory tract infection that developed among 96 patients surviving for > 24 hours after cardiac arrest were prospectively studied over an 18-month period. Pneumonia developed in 23 (24.0%) of patients after a mean of 7 days (SD, +/- 6.2 days). The development of four superinfections raised the cumulative incidence to 28.1%. Purulent tracheobronchitis was diagnosed in three instances. The causative agent of pneumonia was identified in 18 episodes, three of which were polymicrobial. Gram-positive cocci represented 57.1% of isolates, and Staphylococcus aureus--the most frequently isolated microorganism in this population--accounted for two-thirds of all gram-positive cocci. Pseudomonas aeruginosa was isolated in six episodes, five of which were associated with previous antibiotic use. Nine (39.1%) of the 23 patients in the group with pneumonia died, but only one of these deaths was considered to be directly related to pneumonia. In conclusion, pneumonia is a common complication of patients surviving cardiac arrest, but, with adequate treatment, its influence on outcome is marginal. Gram-positive cocci are the predominant pathogens, although infection with P. aeruginosa should be considered among patients receiving antibiotics.