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Method for predicting respiratory distress syndrome outcome in newborns having perinatal central nervous system injury

IPC classes for russian patent Method for predicting respiratory distress syndrome outcome in newborns having perinatal central nervous system injury (RU 2308724):
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The present innovation deals with laboratory investigations in case of traumatological pathology. One should simultaneously carry out microscopic investigation of material sample out of inflammation focus and blood from cubital vein to study the growth of microorganisms in the focus and in case of its absence and at registering positive index of digestion in blood with test culture S.aureus 209 P inside neutrophil after incubation, the value of IgM being 0.5-1.3 against the norm, the value of C-reactive protein being up to 12.0 mg/l it is possible to conclude upon satisfactory result of therapy conducted. Application of the present method enables to evaluate the degree of inflammatory process in bony tissue and, also, the state of phagocytic function of neutrophils as the first line of protection against microbial invasion.
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FIELD: medicine.

SUBSTANCE: method involves determining granulocytic colony-stimulating factor level in plasma. Unfavorable outcome is predicted when determining granulocitic colony-stimulating factor level in plasma of 1.47 ng/ml and lower.

EFFECT: high accuracy of prognosis.

 

The invention relates to medicine, namely to neonatology, and can be used for early prediction of outcome in respiratory distress syndrome and perinatal lesions of the Central nervous system (CNS) in infants, which is on artificial lung ventilation (ALV).

Respiratory distress syndrome continues to be a pressing problem of neonatology, occupying a leading place in the structure of morbidity and mortality in newborns (Kassil C. L., Zolotokrylin Essary respiratory distress syndrome in the light of modern views, " Vestn. intens. Ter. - 2001. No. 31; - P.9-14., Antonov A.G., Volodin N.N., Grebennikov, VA and other Principles of newborns with respiratory distress syndrome: Method. recommendations. - M.: B. I., 2002. - P.14-18).

This problem is most relevant for the departments of intensive care, where there are infants in critical condition determined by the severity of the underlying disease and increased susceptibility to infection.

The importance of the earliest clinical laboratory predict the outcome of respiratory distress syndrome, combined with perinatal Central nervous system, is due to a significant increase in mortality in the group with severe forms of the disease, demanding what their long-term mechanical ventilation.

The analysis of literature showed that the issue of predicting the outcome of respiratory distress syndrome and perinatal lesions of the Central nervous system in infants who are on a ventilator, poorly lit, and therefore development in this direction is very important.

Currently known methods of predicting the outcome of respiratory distress syndrome and perinatal lesions of the Central nervous system in newborns.

A method for predicting the course and outcome of hypoxic-ischemic lesions of the Central nervous system in neonates with RDS according to the patent of Russian Federation №2192779 from 20.11.2002. Using computer analysis assess the quantitative characteristics of spectral indicators power Delta-rhythm and their spatial distribution. If from the first day of the intensive care unit the maximum spectral power observed in occipital and parietal areas, reaching respectively 119-160 µv2and 106-138 µv2and on days 2-3 power characteristics the Delta rhythm reliably prevail in the left hemisphere compared to the right, predicts favorable outcome of the disease.

The disadvantages of this method:

Refers to additional methods of research, labor-intensive technology, the reliability of the research is connected with multiple recording EEG, called the em to predict the severity of Central nervous system, and only indirectly respiratory distress syndrome.

The way to diagnose the severity of respiratory distress syndrome in premature infants with patent RF№2159937 of 27.11.2000. Through biochemical studies of blood plasma proteins determine the protein content and the values of the last above 59% and below 74% of diagnosed respiratory distress syndrome of mild severity, higher 47.1% and below of 58.9% - moderate severity and when the content is below 47% - severe respiratory distress syndrome.

Disadvantages of the method:

A limited number of patients in preterm infants. Allows you to diagnose the severity of lung lesions, but does not allow a high degree of probability to predict disease outcome in severe respiratory distress syndrome requiring mechanical ventilation. Not possible to judge the state of the immune reactivity of the patient.

How to dynamically assess the flow of respiratory distress syndrome by RF patent No. 2153282 from 27.07.2000. Determine the hourly ratio of partial pressure of oxygen in arterial blood to fraction of inhaled oxygen, the distensibility of the lungs, the pulmonary artery pressure. Calculate the rate of change of a ratio of partial pressure of oxygen in arterial blood to fraction of inhaled, the speed of the change of the elasticity of the lungs and the rate of change of pressure in the pulmonary artery on the original mathematical formulas. The effectiveness of the treatment is assessed according to the calculated values when progressing or regressing the course of respiratory distress syndrome (RDS).

Disadvantages of the method:

Cannot be recommended for use in neonatology.

The prototype of the invention is selected the method according to the patent of Russian Federation№2159937 of 27.11.2000.

The prototype disadvantages are eliminated in the invention.

The objective of the invention is to develop a highly sensitive immunological method of predicting outcome of respiratory distress syndrome in newborns with perinatal CNS damage, being on a ventilator.

The problem is solved in that in the blood of newborns enzyme-linked immunosorbent assay (ELISA) to determine levels of endogenous granulocyte colony-stimulating factor (g-CSF) for the admission of patients in the Department and at the level of g-CSF to 1.47 ng/ml and below forecast neblagopriyatnyi outcome of the disease.

For statement analysis is used "test-system enzyme immunoassay for determination of granulocyte colony-stimulating factor (g-CSF) human" production LLC Ctoken", Russia, Saint Petersburg attached to the kit instructions. When receiving the newborn trying to enter 1 ml of venous blood in a Vacutainer tube for receiving plasma from the separation gel and EDTA is used as anticoagulant (Becton Dickinson, USA), centrifuged for 3 minutes at 5000 rpm at a temperature of 4°C. 100 μl of the obtained plasma was used for analysis. The optical density is determined on the multifunctional reader "Viktor" (Finland) at a wavelength of 450 nm. Analysis of results is carried out automatically using a computer program "Viktor-Wallak (Finland).

An adverse outcome of the disease is predicted at the level of g-CSF to 1.47 ng/ml and below.

Prediction of adverse outcome of the disease already at the time of admission to the Department, taking into account the state of the immune status of the organism, allows not only to timely appoint an optimal antibacterial and infusion therapy, but also to use in the early stages of immunomodulating drugs.

Our studies revealed that the determination of endogenous g-CSF allows a high degree of probability to predict the outcome of respiratory distress syndrome and perinatal Central nervous system in infants who are on a ventilator.

The operability of the invention is evidenced by the following specific examples.

Example 1.

Child A-s, 1-s night life, history No. 103/4321. The weight status of the child at the time of transfer from the hospital to the intensive care unit was due to respiratory failure in the form of Acro and perioral cyanosis, shortness of breath, the participation of accessory muscles, the indrawing of the sternum, the sharp weakening of auscultation of breath in the lungs on both sides and perinatal Central nervous system in the form of symptoms of oppression - muscular hypotonia, hyporeflexia. Given the parameters of acid-base composition of the blood (hypoxemia, hypercarbia, decompensated acidosis), the child was transferred on a ventilator and transferred to the intensive care unit.

In the result of research carried out by the method described above the following results were obtained plasma levels of g-CSF: admission to 1.47 ng/ml on the day 3 of 0.75 ng/ml, in the outcome of the disease - 0.3 ng/ml

Detection of plasma levels of g-CSF to 1.47 ng/YPD below to enroll in the resuscitation of the newborn infant with respiratory distress syndrome and perinatal CNS damage, being on a ventilator, testified about the adverse long-term outcome of the disease.

On the 5th day the baby died.

On pathologic-anatomic opening the newborn had a confirmed diagnosis of multiple atelectasis of the lung, bilateral pneumonia and perinatal ischemia and hemorrhagic lesions of the Central nervous system.

Thus, from this example it follows that the detection of plasma levels of g-CSF to 1.47 ng/ml and below at admission to the intensive care unit testified about the adverse prognosis of outcome respirator the th distress syndrome and perinatal CNS lesions in the newborn, located on a ventilator.

Example 2.

Child R s, the first day of life, history No. 126/5731. Came from a maternity hospital in the intensive care unit on a ventilator due to increasing respiratory failure in the face of severe neurological symptoms at the age of 8 hours. When entering the plasma levels of g-CSF amounted to 1.48 ng/ml against the backdrop of ongoing respiratory, antibiotics and intensive care for 3 days when you study the plasma levels of g-CSF increased to 1.65 ng/ml On the 11th day the child was excubitor and transferred to spontaneous breathing. On the 12th day the patient was transferred to the neonatal care unit for further observation and treatment. At the moment the transfer plasma levels of g-CSF was 1.70 ng/ml.

Thus, from this example it follows that the detection of plasma levels of g-CSF to 1.48 ng/ml and above indicates a possible favorable prognosis of the outcome of respiratory distress syndrome in newborns with perinatal CNS damage, being on a ventilator.

The proposed method was examined in 38 infants with respiratory distress syndrome and perinatal CNS damage in critical condition in the ICU on a ventilator. 14 children, where plasma levels of g-CSF for admission to the Department do not exceed the concentration of 1.47 ng/ml, had a summer place the capacity outcome of the disease. When pathologic-anatomic study, all patients were found to have multiple lung atelectasis, pneumonia, combined with perinatal CNS damage. In 5 patients, and the section was confirmed diagnosis of neonatal sepsis, a complication for respiratory distress syndrome.

24 children plasma levels of g-CSF for admission amounted to 1.48 ng/ml and above. All of these patients were transferred to the neonatal care unit.

Thus, the study upon admission to the intensive care unit plasma levels of g-CSF in neonates with respiratory distress syndrome and perinatal CNS damage, being on a ventilator, lets say that the accuracy of the proposed method is 90.7 percent.

Based on the foregoing, the inventive method predict the outcome of respiratory distress syndrome and perinatal CNS lesions compared with existing methods has the following advantages:

1. The method allows to predict the outcome of respiratory distress syndrome and perinatal Central nervous system in infants who are on a ventilator during admission to the intensive care unit, allowing immediate increase of intensive therapy.

2. The method applies to the Express-diagnostics (run time 1 hour).

3. The proposed method oblad is no high accuracy and will find wide application not only in the pediatric intensive care unit, but in other pediatric hospitals.

The proposed method for predicting the outcome of respiratory distress syndrome and perinatal Central nervous system in infants who are on a ventilator can be used in neonatology, Pediatrics and intensive care, complementing the known methods of laboratory diagnostics, allowing timely and reasonably assign pathogenetic therapy, increasing survival and reducing the duration of treatment.

A method for predicting the outcome respiratornog distress syndrome in newborns with perinatal CNS damage, being on a ventilator, by studying the blood, characterized in that to determine the plasma levels of granulocyte colony-stimulating factor, and when the value of the last of 1.47 ng/ml and below predict adverse outcome of the disease.

 

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