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Biomedical subjects

S Salcedo Abizanda

Publications and source records attributed to S Salcedo Abizanda.

13 recordsLinked to original sources

[Continuous arteriovenous hemofiltration in the newborn infant].

OBJECTIVE: We present 12 newborns with acute renal failure (ARF) of different etiologies that were treated with continuous arterio-venous hemofiltration (CAVH). PATIENTS AND METHODS: Gestational age and birth weight ranged from 26-42 weeks and 700-4, 700 grams, respectively. The umbilical artery and vein were most frequently used as vascular accesses. Two types of filters were used: Gambro FH 22 and Amicon Minifilter. RESULTS: Treatment lasted from 8 to 120 hours. We obtained an ultrafiltration median of 25 ml/h ranging from 10.75 mL/h to 82.8 mL/h (4.1-31.8 mL/k/h). The volume balance was negative in all patients. Treatment was well tolerated. Complications included hypotension when the system was started and hypoglycemia. CAVH was stopped because of normalization of renal function in 6 cases and death in the other 6. In the latter, cardiac malformation was the cause of death in 3 cases and multiple organ failure in the other 3. CONCLUSIONS: CAVH is useful is the treatment of ARF in the oligoanuric newborn.

Acute Kidney Injury↗

[Granulocyte colony-stimulating factor in the newborn neutropenic patient].

OBJECTIVE: To assess the therapeutic effect of G-CSF in newborns with neutropenia. METHODS: Newborn with evidence of both peripheral neutropenia and decreased granulocytic precursors in tibial bone marrow aspirate were included in the study. G-CSF was perfused intravenously over 2 hours at dose of 10 micrograms/kg/day, during 4-8 days. CBC were obtained immediately before each dose of G-CSF. RESULTS: Neutropenia followed neonatal sepsis in four cases and maternal pre-eclampsia in three. Prior to treatment, peripheral blood granulocyte (PMNL) counts ranged from 420 to 1,073/mm3. Once G-CSF infusion was started, counts returned to normal within 24-48 hours. No adverse effects related to G-CSF administration were noticed. CONCLUSIONS: G-CSF induces a significant increase in peripheral PMNL counts in newborn with neutropenia, in the absence of significant toxic effects. Our date suggest a potential role for G-CSF in the prophylaxis and treatment of sepsis in the neutropenic newborn, although widespread recommendation must await further, controlled studies.

Combined Modality Therapy↗

[Characteristics of group b streptococcus vertical transmission].

OBJECTIVE: The goal of this study was to compare the characteristics of group B streptococcus (GBS) or Streptococcus agalactiae vertical transmission in woman, receiving or not intrapartum. antimicrobial prophylaxis, at risk of delivering an infant with GRS disease. MATERIALS AND METHODS: The study included 330 women, with risk factors for delivering an infant with GBS disease. The vaginal GBS colonization was studied by conventional culture. A clinical and microbiological follow-up was done in both women and neonates. RESULTS: GHS was detected in 37 women (11.2%). Among these, 21 (56.8%) received intrapartum antibiotics and 16 (43.2%) did not. Forty-one neonates were born from these 37 women. Of these, 11 showed signs of infection (3 with positive blood culture and 8 with blood culture negative for GBS) and 2 presented an asymptomatic bacteremia A GBS neonatal infection (with positive blood culture) was produced in 4.8% of newborns from mothers who received intrapartum antibiotics versus 25% of newborns from mothers who did not receive intrapartum antibiotics. However, this difference was not significant nor was the difference between external colonization by GBS between these two groups of newborns. On the contrary, significant differences were found in the percentage of clinically suspected sepsis (with negative blood cultures), which was more frequent among newborns from mothers without intrapartum antibiotics (30.4% vs 5.6%). A good correlation between the intensity of vaginal colonization and the incidence of microbiologically demonstrated sepsis, suspected sepsis an asymptomatic bacteremia in the newborn was found. CONCLUSION: In conclusion, in order to minimize the vertical transmission of GBS, the most efficient strategy seems to be to offer antibiotic prophylaxis to women identified as GBS carriers, since the antibiotic administration to women with "obstetric risks" often means that it is impossible that two hours elapse between antibiotic administration and delivery, resulting in the loss of efficacy of this second strategy.

Anti-Bacterial Agents↗

[Usefulness of body surface cultures in newborns with early infection risk. Study of 735 neonates].

OBJECTIVE: Difficulty in the diagnosis of neonatal sepsis has lead to the practice of superficial cultures. The usefulness of this practice has been criticized repeatedly. PATIENTS AND METHODS: Results of 3881 cultures performed on 735 newborns (age < or = 48 hr) with early infection risk were reviewed. The types of samples chosen were urine (UR), gastric aspirate (GA), pharyngeal (PS), external ear (ES), umbilical swab (US), meconium (MC) and blood. BBV for sepsis for the different samples is calculated, as well as which ones better reflect vertical transmission. RESULTS: At the time of the study, 342 newborns (46.5%) were already colonized. Bacteria most frequently isolated were: E. coli (92), PCN staphylococci (85), enterococci (83) and S. agalactiae (70). Twenty-nine newborns had bacteriemia, with S. agalactiae being the leading cause (16). ES correlated best with positive blood cultures (83.3%). UR culture sensitivity was significantly lower than that of all other samples. The Highest PPVs were for GA, PS and US. NPV was high and similar for all samples (98-99%). ES and US best reflected vertical transmission (p < 0.0001). MC provided the highest number of positive mixed cultures, most of them difficult to evaluate. CONCLUSIONS: Body surface sample advantages are: 1) The possibility of discarding a vertically transmitted infection. 2) Quicker positive results than those in blood whenever liquid blood culture media are employed. 3) The possible identification of the etiologic agent when the mother has been given antibiotics intrapartum. 4). Information about dangerous colonization without infection. In order not to lose this useful information, but to save cost and effort, we advise that the number of surface cultures be reduced, keeping only ES and PS?

Escherichia coli↗

[Umbilical colonization in normal newborns. A comparative study of 4 methods for umbilical antisepsis].

We report the results of a prospective study in which the effectiveness of 70% alcohol (A), mercurochrome (M), a solution of alcohol and mercurochrome (AM) and 1% chlorhexidine (C) as umbilical antiseptics was tested on 311 normal newborn infants. Similar results were obtained by using A, M, or AM; however, when C was used umbilical colonization was significantly reduced as compared to when the other three antiseptic agents were used. The umbilical cords that had been scrubbed with A, M or AM were detached by the 8th day after birth, whereas those treated with C took 14 days to fall off. The use of chlorhexidine resulted in a marked increase in pure cultures positive for Gram negative bacteria (Proteus spp. and Pseudomonas spp.) which was not the case with the other three antiseptics tested.

Anti-Infective Agents, Local↗

[Nutritional support of premature newborn infants with birthweight below 1.500 g].

16 preterm babies with birthweights between 738 and 1,390 g (mean: 1,105. SD: +/- 176.7) and with gestational ages between 27 and 31 weeks (mean: 29.5. SD: +/- 1.32), were fed according to a combined scheme: parenteral nutrition, for a period of 12 days, plus enteral feedings of chemically defined diet, given by nasogastric tube through a continuous infusion, until the 35th week of postconceptional age. All 16 babies had a satisfactory course, with no significant side-effects. Their weight gain was between 9 and 22 g/day (mean: 13.8. SD: +/- 4.2). No significant blood biochemical abnormalities were detected. Our results showed that this combined feeding scheme (enteral & parenteral) worked satisfactorily in this group of newborn premature babies.

Birth Weight↗

[Congenital mesoblastic nephroma].

Authors report three cases of congenital mesoblastic nephroma. In two of them, diagnosis was neonatal, while the third was made at the 3rd-month. They discuss diagnostic procedures employed as well as pathological findings. Presence of a mass was the first clinical sign in all three cases. Nephrectomy was the only treatment employed, with favourable outcome.

Female↗

[Cytomegalovirus infection in 32 children (author's transl)].

Thirty-two cases of cytomegalovirus infection are reviewed; 13 were congenital, 19 acquired. The clinical aspects of evolution and manifestation of the disease, agree with those described in other series. Virological diagnosis was based on isolating the virus from either urine or pharynx (or both) and culturing in pulmonary fibroblasts from human embryo. To obtain optimum results, fresh specimens must be used. Although several techniques are available for CMV antibody measurement, immunofluorescence is the technique of choice. Clinical manifestations differ according to age and immunological status of the patient. Late manifestations of congenital infection, monosymptomatic forms and acquired forms of the disease are at present of great interest. Importance of establishing diagnosis through virological isolation whenever a cytomegalovirus infection is suspected, is underlined.

Antibodies, Viral↗