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Membrana neovascular y embarazo. Tratamiento con bevacizumab / Neovascular membrane and pregnancy. Treatment with bevacizumab

Caso clínico: Mujer en el sexto mes de gestación, con antecedentes de cirugía refractiva, que consulta por metamorfopsias y disminución de la agudeza visual en el ojo derecho. En la exploración se observa una membrana neovascular coroidea subfoveal asociada al síndrome de presunta histoplasmosis ocular (SPHO). Tras el parto se realiza tratamiento con dos dosis mensuales de bevacizumab intravítreo. La tercera dosis no se realiza por nuevo embarazo, observándose posteriormente aborto espontáneo sin causa conocida. Discusión: El tratamiento con bevacizumab intravítreo durante el embarazo es controvertido, ya que es posible que aumente el riesgo del aborto espontáneo durante el primer trimestre(AU)

Clinical case: Female in her sixth month of pregnancy, with a history of refractive surgery, who consulted due to a metamorphopsia and decrease in visual acuity in the right eye. A presumed ocular histoplasmosis syndrome (POHS) and a subfoveal choroidal neovascular membrane were observed in the fundoscopy. Two monthly doses of intravitreal bevacizumab were given after the labour, but the third dose was never inyected as the patient became pregnant again. She subsequently had a spontaneous miscarriage. Discussion: Treatment with intravitreal bevacizumab during pregnancy is controversial as it may increase the risk of miscarriage during the first trimester(AU)

[Neovascular membrane and pregnancy. Treatment with bevacizumab]. / Membrana neovascular y embarazo. Tratamiento con bevacizumab.

CLINICAL CASE: Female in her sixth month of pregnancy, with a history of refractive surgery, who consulted due to a metamorphopsia and decrease in visual acuity in the right eye. A presumed ocular histoplasmosis syndrome (POHS) and a subfoveal choroidal neovascular membrane were observed in the fundoscopy. Two monthly doses of intravitreal bevacizumab were given after the labour, but the third dose was never inyected as the patient became pregnant again. She subsequently had a spontaneous miscarriage. DISCUSSION: Treatment with intravitreal bevacizumab during pregnancy is controversial as it may increase the risk of miscarriage during the first trimester.

Emergence and rapid spread of carbapenem resistance during a large and sustained hospital outbreak of multiresistant Acinetobacter baumannii.

Beginning in 1992, a sustained outbreak of multiresistant Acinetobacter baumannii infections was noted in our 1,000-bed hospital in Barcelona, Spain, resulting in considerable overuse of imipenem, to which the organisms were uniformly susceptible. In January 1997, carbapenem-resistant (CR) A. baumannii strains emerged and rapidly disseminated in the intensive care units (ICUs), prompting us to conduct a prospective investigation. It was an 18-month longitudinal intervention study aimed at the identification of the clinical and microbiological epidemiology of the outbreak and its response to a multicomponent infection control strategy. From January 1997 to June 1998, clinical samples from 153 (8%) of 1,836 consecutive ICU patients were found to contain CR A. baumannii. Isolates were verified to be A. baumannii by restriction analysis of the 16S-23S ribosomal genes and the intergenic spacer region. Molecular typing by repetitive extragenic palindromic sequence-based PCR and pulsed-field gel electrophoresis showed that the emergence of carbapenem resistance was not by the selection of resistant mutants but was by the introduction of two new epidemic clones that were different from those responsible for the endemic. Multivariate regression analysis selected those patients with previous carriage of CR A. baumannii (relative risk [RR], 35.3; 95% confidence interval [CI], 7.2 to 173.1), those patients who had previously received therapy with carbapenems (RR, 4.6; 95% CI, 1.3 to 15.6), or those who were admitted into a ward with a high density of patients infected with CR A. baumannii (RR, 1.7; 95% CI, 1.2 to 2.5) to be at a significantly greater risk for the development of clinical colonization or infection with CR A. baumannii strains. In accordance, a combined infection control strategy was designed and implemented, including the sequential closure of all ICUs for decontamination, strict compliance with cross-transmission prevention protocols, and a program that restricted the use of carbapenem. Subsequently, a sharp reduction in the incidence rates of infection or colonization with A. baumannii, whether resistant or susceptible to carbapenems, was shown, although an alarming dominance of the carbapenem-resistant clones was shown at the end of the study.

Risk factors for faecal carriage of Klebsiella pneumoniae producing extended spectrum beta-lactamase (ESBL-KP) in the intensive care unit.

In the course of an outbreak of extended-spectrum beta-lactamase-producing Klebsiella pneumoniae (ESBL-KP) in an intensive care unit (ICU), we conducted active surveillance to determine the risk factors for ESBL-KP faecal colonization of patients. We used weekly rectal samples during a four-month period. ESBL-KP was found in the faeces of 72 of 188 (38%) patients, and 42 (58%) of them were colonized within the first week of admission to the ICU. The probability of remaining free of faecal colonization was less than 20% at 30 days of ICU admission. The risk factors associated with ESBL-KP faecal colonization were clinical severity score at admission (P = 0.004), arterial catheterization (P = 0.002), total parenteral nutrition (P = 0.04), urinary catheterization (P = 0.01), mechanical ventilation (P < 0.001), and previous antibiotic therapy (P = 0.04). A logistic regression analysis identified duration of urinary catheterization (OR:3.5; 95% CI 1.2-10.3) and mechanical ventilation (OR:4.6; 95% CI 1.1-19.3) as independent risk factors for ESBL-KP faecal colonization. Our results suggest that in an ESBL-KP prevalent environment, manipulations that facilitate cross-infection are the most relevant in the acquisition of the micro-organism and risk increases throughout hospitalization.

[Separate lung ventilation circuit]. / Circuit de ventilation à poumons séparés.

A description of a selective ventilation distribution circuit (S.V.D.C.). The use of this circuit is illustrated by the description of 5 cases where the following were applied: 1 - the measurement of tidal volume of pressures for each lung during the respiratory cycle; 2 - regulation of tidal volumes to be as appropriate as possible for the patient; 3 - the application of different degrees of PEEP for each lung. This circuit is easy to construct and manipulate. It is connected to the patient via a double lumen endotracheal tube (Carlens) and uses only one respiratory.

A selective ventilation distribution circuit (S.V.D.C).

A circuit for selective ventilation distribution (S.V.D.C.) is described. The use of the circuit is illustrated with five cases in which it was used. S.V.D.C. allowed: 1) Measurement of individual lung tidal volumes and pressures during the respiratory cycle. 2) Adjustment of the tidal volumes of both lungs in the most appropriate way for the patient. 3) Application of different degrees of PEEP to each lung. The circuit is easily built and managed, the patient is connected to it by a double lumen endotracheal tube (Carlens tube); the circuit requires only one respirator.