Comparison between Wright and Shukla formulas: which is better for the placement of umbilical catheters in newborns ≤ 1500 g?

Background: Intravascular venous (VUC) or arterial (AUC) umbilical catheter placement is the most frequent invasive procedure in the neonatal intensive care unit (NICU). Either Wright's or Shukla's formula is used to introduce the catheters. However, Shukla's formula is associated with incorrect insertion, especially for newborns < 1500 g.

Incidence of congenital and postnatal cytomegalovirus infection during the first year of life in Mexican preterm infants.

Cytomegalovirus infection occurs commonly during infancy. Postnatal infection in term infants is usually asymptomatic; however, infection in preterm infants can be associated with clinical manifestations during the neonatal period. Nevertheless, few studies to assess the frequency of cytomegalovirus infection in preterm infants have been performed outside of high-income countries.

Changes in PPAR-γ Expression Are Associated with microRNA Profiles during Fetal Programming due to Maternal Overweight and Obesity.

Background: There has been a global increase in the prevalence of obesity in pregnant women in recent years. Animal studies have shown that intrauterine environment associated with maternal obesity leads to epigenetic changes. However, the effects of epigenetic changes occurring before birth in response to maternal conditions have not been clearly characterized in humans.

Clinical impact and direct costs of nosocomial respiratory syncytial virus infections in the neonatal intensive care unit.

Background: Nosocomial infections are a leading cause of morbidity, costs, and mortality in preterm newborns. Most reports regarding nosocomial infections in neonatal intensive care units (NICU) are focused on bacterial infections and there is limited information regarding the impact of nosocomial viruses. The objective of this study was to assess the impact of nosocomial respiratory syncytial virus (RSV) infections in a NICU.

Respiratory syncytial virus acute respiratory infection-associated hospitalizations in preterm Mexican infants: A cohort study.

Background: Respiratory syncytial virus (RSV) is the leading cause of severe acute respiratory infections (ARI) in preterm infants. The incidence of RSV-associated hospitalizations has not been defined in Mexico.

Objectives: To determine the incidence of ARI- and RSV-associated hospitalizations in preterm infants during the first year of life.

Correlation of perfusion index with patent ductus arteriosus repercussion in premature newborns.

Background: The ductus arteriosus is a necessary structure in fetal circulation, and its patency can produce hemodynamic alterations. The diagnostic gold standard is echocardiography, not always available. In the neonatal intensive care unit (NICU), they have pulse oximetry that measures perfusion index (PI), which could be used as a diagnostic tool in hemodynamically significant patent ductus arteriosus (HSPDA).

Correlación del índice de perfusión con la repercusión del conducto arterioso en prematuros.

Background: The ductus arteriosus is a necessary structure in fetal circulation, and its patency can produce hemodynamic alterations. The diagnostic gold standard is echocardiography, not always available. In the neonatal intensive care unit (NICU) they have pulse oximetry that measures perfusion index (PI), which could be used as a diagnostic tool in hemodynamic significant patent ductus arteriosus (HSPDA).

Differential expression profiles of circulating microRNAs in newborns associated to maternal pregestational overweight and obesity.

Background: The perinatal environment has a role in the establishment of altered metabolic and inflammatory responses, and could be modulated by microRNAs regulating immune and metabolic processes.

Objective: To analyze the expression profile of four circulating microRNAs and cytokine serum concentrations in neonates born to overweight and obese women.

Methods: Pregnant women were included and grouped by pregestational body mass index (21 with normal weight, 10 overweight and 10 obese women).

NK cell immunophenotypic and genotypic analysis of infants with severe respiratory syncytial virus infection.

Respiratory syncytial virus (RSV) is the leading cause of severe lower respiratory tract infection in infants. Reduced numbers of NK cells have been reported in infants with severe RSV infection; however, the precise role of NK cells during acute RSV infection is unclear. In this study the NK and T cell phenotypes, LILRB1 gene polymorphisms and KIR genotypes of infants hospitalized with RSV infection were analyzed.

NKG2C gene deletion in the Mexican population and lack of association to respiratory viral infections.

Expansion of a natural killer (NK) cell population that expresses NKG2C has been associated with cytomegalovirus and other viral infections. It has been suggested that this cell population may play a role in infection control. Deletion of the NKG2C gene (homozygous or heterozygous) has been reported with high prevalence in European and Asian populations.

Epidemiology of Bordetella pertussis in San Luis Potosí, Mexico.

We analyzed data from 147 patients with suspected pertussis in San Luis Potosí, Mexico. Bordetella pertussis was detected by real-time polymerase chain reaction in 59 (40.1%) cases.

[Perinatal mortality in San Luis Postosí, 1988].

Through participation of ten hospital institutions in the city of San Luis Potosí, which systematically take care of newborns, the present collaborative study was performed; this includes all births during the period from january 1st. to december 31st., 1988.