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Стаття надшшла до редакцп 18.03.2019
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UDC 616.131-007.22-053.32-08:615.456 https://doi.Org/10.26641/2307-0404.2019.2.170125
A. Obolonskyi1, management of patent
V. Snisar2, ductus arteriosus
D. iïurkw , 2 in premature infants
O. Obolonska , O. Kapustina 1, K. Vereza 1
MI «DnipropetrovskRegional Children's Clinical Hospital» DRC» 1 Kosmichna str., 13, Dnipro, 49100, Ukraine
SE «Dnipropetrovsk medical academy of Health Ministry of Ukraine» 2 V. Vernadsky str., 9, Dnipro, 49044, Ukraine e-mail: a_obolonskij@ukr.net
K3 «ffnmponempoecbKa oônacna dumnna Knininna niKapnn» ßOP» 1 eyn. KocMinna, 13, ffninpo, 49100, YKpaïna flß «ßnmponempoecbKa Medunna aKadeMin M03 YKpaïnu» 2 eyn. Вeрnaдcbкoгo, 9, ffninpo, 49044, YKpaïna
Цитування: Медичт перспективи 2019. Т. 24, № 2. С. 33-40 Cited: Medicni perspektivi. 2019;24(2):33-40
Key words: patent ductus arteriosus, restrictive infusion therapy, cox inhibitors, premature newborns Ключовi слова: eidKpuma apmepicmbna протока, рестриктивна iнфузiйна теpапiя, тгибтори ЦОГ, недоношенi новонcpодженi
Ключевые слова: открытый артериальный проток, рестриктивная инфузионная терапия, ингибиторы ЦОГ, недоношенные новорожденные
Abstract. Management of patent ductus arteriosus in premature infants. Obolonskyi A., Snisar V., Surkov D., Obolonska O., Kapustina O., Dereza K. Closure of hemodynamically significant patent ductus arterios (HSPDA) is one of the most important questions in modern neonatal intensive care, especially for preterm babies. Long-term functioning of the hemodynamically significant arterial duct leads to a large number of complications in premature babies, such as: bronchopulmonary dysplasia, periventricular leucomalacia, intraventricular hemorrhage, retinopathy of the premature. To prevent all these complications, the PDA should be closed pharmacologically or surgically as soon as possible without any hesitation. COX inhibitors are commonly used nowa days. Ibuprofen and indomethacin show the equal efficacy and no significant adverse events. But some patients still need surgical treatment. The aim of the study was to determine the feasibility, effectiveness and safety of using various volumes of infusion in combination
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with COX inhibitors and to determine its effect on the timing of the closure of PDA. 91 premature infants with a gestational age of 26-31 weeks with manifestations of respiratory distress syndrome and HSPDA were studied retrospectively. Premies were divided into 2 groups. Research groups were representative as to gestational age, gender, and weight (1205.0±435.0 g). Therapy for PDA closure included the use of various volumes of restrictive or liberal infusion therapy (from 50 to 100 ml/kg/day) and COX inhibitors (indomethacin, ibuprofen). The volume of infusion therapy was limited in the first group. Preemies received 53.5±6.4 ml/kg/day on DOL1 and 2. From the third day urine excretion increased and the volume of infusion therapy also raised to 63.6±5.6 ml/kg/day, and on day 5 - to 89.7±6.8 ml/kg/day. In the second group there was no strict limitation of the volume of infusion therapy (especially in the first 5 days). Delayed period of PDA closure (on average from 14.55±0.56 DOL) was associated with absence of limitation of the infusion volume. In the first group, volume of infusion therapy was restricted in the first 5 days, and the closure of the ductus arteriosus occurred extremely early (on 2.35±0.48 DOL). COX inhibitors were prescribed according to the standard scheme: in the first 3 days indomethacin was administered orally in doses of 0.2/0.1/0.1 mg/kg/day. If the premature baby had symptoms of intestinal paresis (this restricted oral administration of indomethacin), ibuprofen was prescribed in a three-day course in doses of 10/5/5 mg/kg/day intravenously or 20/10/10 mg/kg/day in rectal form. In all groups, standard PDA closure therapy was used. In the more remote periods (14 and 28 days), there was no fundamental difference in the volume of infusion in all groups. For early PDA closure limitation of infusion therapy in the first 3-5 days in combination with COX is principle.
Реферат. Терашя ввдкритоТ apTepiaibHo'i протоки в недоношених новонароджених. Оболонський О.1., Сшсар В.1., Сурков Д.М., Оболонська О.Ю., Капустша О.Г., Дереза К.О. Тривале функщонування гемоди-naMi4uo значущо'1' eidKpumoi apmepimbuoi протоки (ГЗВАП) призводить до велико'1' KrnbKocmi ускладнень у недоношених дтей, таких як: бронхолегенева дисnлазiя, перивентрикулярна лейкомалящя, внутршньо-шлуночковi крововиливи, ретинопатiя новонародженого. Щоб запобшти вам цим ускладненням, ГЗВАП необхiдно закрити фармакологiчно або хiрургiчно протягом перших трьох днiв, якщо це можливо. Закриття гемодинамiчно значущо'1' вiдкрито'i артерiально'i протоки е одним з найважливших питань ттенсивно'1' терапп новонароджених, особливо для недоношених дтей. Iнгiбiтори ЦОГ зазвичай використовуються на цей час для медикаментозного закриття протоки. 1бупрофен й тдометацин показують рiвну ефективтсть, менше побiчних ефектiв при використаннi iбупрофену. Метою до^дження було визначити доцшьнкть, ефектив-нiсть i безпеку використання р1зних обсягiв тфузп в комбтацп з iнгiбiторами ЦОГ i визначити вплив на термiни закриття ГЗВАП. Ретроспективно було вивчено 91 недоношену дитину з гестацшним вiком 2631 тижнiв, прояви рестраторного дистрес-синдрому, ГЗВАП, ят л^валися в реанiмацiйному вiддiленнi. До^дницью групи були репрезентативними щодо гестацшного вi^, статi та ваги (1205,0±435,0 г). Тератя для закриття КПК включала застосування рiзних обсягiв рестриктивно'1' або лiберальноi iнфузiйноi терапп ^д 50 до 100 мл/кг/добу) та iнгiбiторiв ЦОГ (iндометацин, iбупрофен). Обсяг iнфузiйноi терапп був обмежений у першш грут. Недоношен новонароджет отримали 53,5±6,4 мл/кг/день на 1 та 2 добу. З третього дня екскрецiя сечi збыьшувалася, збыьшувався об'ем iнфузiйноi терапп до 63,6±5,6 мл/кг/день, а на 5 день збшьшено до 89,7±6,8 мл/кг/добу. У другш гр^, де застосовувалась лiберальна тфузшна тератя та не спостершалося суворого дотримання обмеження обсягу iнфузiйноi терапп (особливо в першi 5 дтв), спостершався вiдстрочений термiн закриття ГЗВАП (у середньому з 14,55±0,56 доби). У першш гр^, де обмеження обсягу iнфузiйноi терапп дотримувалися бшьш чтко в першi 5 дтв, закриття артерiальноi протоки вiдбувалосярано (при 2,35±0,48 доби). Iнгiбiтори ЦОГпризначались за стандартною схемою: в першi 3 днi iндометацин вводять перорально в дозах 0,2/0,1/0,1 мг/кг/добу. Якщо в недоношено'1' дитини з'являлися симптоми парезу кишювника (це перешкоджало пероральному введенню тдометацину), тодi iбупрофен призначався в триденному кура в дозах 10/5/5 мг/кг/добу внутршньовенно або 20/10/10 мг/кг/добу в ректальнш формi. У вах означених групах застосовували стандартну тератю закриття ГЗВАП. У бшьш вiддаленi перюди (14 i 28 днiв) не було принципово'1' рiзницi в обсязi тфузПу всх групах, що говорить про те, що принцип раннього закриття КПК полягав у обмеженнi iнфузiйноi терапп в першi 3-5 дтв на тлi стандартно'1' терапп iнгiбiторами ЦОГ.
One of the actual issues of modern neonatal medicine is the reduction of the negative influence of the patent ductus arteriosus (PDA) on morbidity and mortality in preterm infants. The hemodyna-mically significant PDA (HSPDA) has a great value on the development of periventricular leukomalacia (PVL), intraventricular hemorrhage (IVH), bronchopulmonary dysplasia (BPD), necrotizing enterocolitis (NEC), sepsis, retinopathy of prematurity (ROP), which leads to disability in preemies [6].
According to many authors, the time of PDA closure is also an independent factor affecting morbidity and mortality in preterm infants. In a number of publications, we substantiated and proved that delayed PDA closure (after day 3 of life), significantly increases the percentage of complications such as BPD, PVL, IVH, NEC, ROP [4].
As we have mentioned earlier [5], among the different ways of PDA management cyclooxygenase (COX) inhibitors, modes of infusion therapy,
diuretics play major role. Also it is important to reduce the negative impact of respiratory support (balanced approach to intubation, early extubation, the use of noninvasive ventilation).
Indomethacin and ibuprofen have been traditionally used as COX inhibitors. The possibility of using paracetamol for PDA closure is periodically being discussed [5, 9], but this way has not been widely accepted as for now. Comparative effectiveness of different COX inhibitors has been described in our resent publications [13]. The therapeutic value of COX inhibitors has no doubts opposed to the restrictive infusion therapy in the maintance of the pharmacological PDA closure.
However, according to the Cohrane review, there is the so-called conservative therapy for the PDA closure, against which only the restriction of infusion therapy without COX inhibitors using is included [1, 6, 12]. Regarding the recommended volume of restrictive infusion therapy, the data vary significantly: from 100130 ml/kg/day to 60-80 ml/kg/day in the first 3 DOL. The effectiveness of conservative therapy for the closure of hemodynamically significant PDA is 4045% and therefore it is not accepted widely according to a number of authors [14]. Some authors believe that only the early surgical clumping of the duct is essential, but not the choice of COX inhibitor for PDA closure. The reduction of the infusion is often left unadressed [1, 3, 6, 7, 8, 10, 11]. Obviously, restrictive infusion therapy for treatment HPDA should be used in combination with COX inhibitors and is recommended by most authors and editions [1, 3, 6, 7, 8, 10, 11].
There also exists a theory that at present time there is a clear connection with the volume of infusion and the term of PDA closure. Taking into account the above, we have done a comprehensive research. We studied the impact of the termination of the PDA on morbidity and mortality in preterm infants, and analysed the effectiveness of various treatment options for PDA closure.
MATERIALS AND METHODS OF RESEARCH
Goal - the main purpose of the study was to establish the expediency, efficiency and safety of using different volumes of infusion in combination with COX inhibitors and to determine their effect on the timing of the HPDA closure.
Retrospective study of 91 preterm infants who received treatment in the intensive care unit of the Regional Children's Clinical Hospital in Dnipropetrovsk in 2012-2017 was carried out. Research groups were representative as for gestational age, gender and weight.
Criteria
Inclusion criteria: gestational age 26-31 weeks, manifestations of respiratory distress syndrome (RDS), HPDA.
Exclusion criteria: IVH grade 3-4, congenital malformation, early onset of neonatal sepsis.
Premature infants were admitted to the NICU on DOL 1-2. The doplerographic echocardiography has been performed during first day of staying at the NICU. 100% of preemies had an open ductus arteriosus. All examined preterm infants in all groups had manifestations of acute respiratory distress syndrome and they were given artificial ventilation of lungs with different settings. After extubation, non-invasive respiratory support was used to complete the transition to spontaneous respiration.
Methods
Systemic and cerebral hemodynamics were assessed with ultrasound examination methods (dop-lerographic echocardiography, cranial ultrasound with the doplerography) and clinically. All preterm infants included in the study were examined in seven stages. The first stage: observation immediately after admission to the NICU of the Regional Children's Clinical Hospital in Dnipropetrovsk. The second stage: a 3 day course of the therapy. Subsequent stages were in dynamics on day 5, 7, 14 and 28 of therapy respectively.
There were 54 (59.3%) boys, 37 (40.6%) girls. Weight at birth was 1205.0±435.0 grams on average. The all preterm infants who were admitted to the NICU were in severe condition. The main problems were respiratory distress syndrome, patent ductus arteriosus, which conditioned the need for respiratory and inotropic support.
All preterm infants received restrictive infusion therapy of varying degrees, along with COX inhibitors for the PDA closure. It has been noted that the arterial duct is closed at different times.
Depending on the term of PDA closure, preemies were retrospectively divided into two groups:
The first study group - an early closure of the arterial duct (in the first 3 days) - 40 preemies (67%). The preterm infants had gestational age of 29.0±1.5weeks, weight - 1222.2±356.0 grams in average. In the first group there were 27 (67.5%) boys, 13 (32.5%) girls.
The diameter of the PDA was 2.8±0.7 mm on the first examination in the NICU.
The second study group - 20 preterm infants (33%). Preemies had gestational age of 28.6±2.2 weeks, and weight - 1218.5±356.0 grams in average. In the second group there were 9 (45%) boys, and 11 (55%) girls. The diameter of the PDA was 3.0±0.3 mm on the first examination in the NICU. In the second group arterial duct was closed in a delayed time (more than 4 days) pharmacologically, or by surgical clumping.
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There was no significant difference in sex between the groups. There was no principal difference between the groups in patient's weight.
The statistical processing of the research materials was carried out using the biostatistics methods implemented in the STATISTICA v.6.1 software package (Statsoftlnc., USA) (license number AJAR909E415822FA).
The hypothesis about the normal law of distribution of indicators was verified according to the Kolmogorov-Smirnov criterion. Comparison of statistical characteristics in different groups and observation in dynamics was carried out using parametric and nonparametric criteria (taking into account the distribution law): verification of the equality of dispersions - according to the criteria of Fisher (F) and Leuven (LeveneTest); Estimation of probability of mean differences for unrelated samples -according to Student (t) and Mann-Whitney (U) criteria, for bound - according to Student (t) and Wil-coxon criteria (T); The probability of differences in relative indices is based on the criterion of the Hex-squared of Pearson (2). For the correlation between the signs, a correlation analysis was performed with the calculation of the Spirman rank correlation coefficients (r). The critical significance level of the statistical significance (p) was taken at <5% (p<0.05).
The Therapy of PDA
The therapy of PDA closure included the use of different volumes of restrictive infusion therapy (from 50 to 100 ml/kg/day) in combination with COX inhibitors. Also dobutamine was prescribed in doses of 7.5-10 ^g/kg/min intravenously. COX inhibitors were prescribed according to standard regimens: in the first 3 days - indomethacin orally in doses 0.2/0.1/0.1 mg/kg/day. If the preterm infant
had symptoms of intestinal paresis (this prevented the oral administration of indomethacin), Ibuprofen was administered in a three-day course in doses of 10/5/5 mg/kg/day intravenously or in a rectal form at a dose of 20/10/10 mg/kg/day.
Thus, in all groups of preterm babies standard therapy was used for PDA closure.
RESULTS AND DISCUSSION
Volume of Infusion Therapy
The volume of infusion therapy was restricted in the first group. Preemies received 53.5±6.4 ml/kg/day on DOL1 and 2. From the third day urinary excretion increased, there was an increase in the amount of infusion therapy up to 63.6±5.6 ml/kg/day, and on day 5 it was raised to 89.7±6.8 ml/kg/day.
It should be noted that precisely with the application of this given limited amount of infusion therapy, we observed an early closure of the arterial duct in this group.
Comparing the first and second groups, it should be noted that in the second group there was no strict adherence to the restriction of the volume of infusion therapy (especially in the first 5 days), and we associated the delayed term for the PDA closure of arterial duct with that fact. In the first group the limit of the volume of infusion therapy was observed more clearly in the first 5 days, and we have the closure of the arterial duct exceptionally early. With regard to the volume of infusion therapy in a more distant terms (14 and 28 days), there were no fundamental differences in the volume of infusion in all groups, which suggests that the principle was the restriction of the infusion therapy in the first 5 days only (Fig. 1).
ml/k g/d ay 180
160 140 120 100 80 60 40 20 0
1 Day
3 Day
5 Day 7 Day 14 Day 28 Day
□ I group ^2 group
Fig. 1. The volume of infusion therapy in 1 and 2 groups at different times
According to our data, we can conclude that the term of PDA closure in preterm infants as much as possible depends on the restriction of infusion therapy in the DOL 1 to DOL 5. The recommended volume of infusion on the first and second day of life can be considered 53.5±6.4 ml/kg/day, and for third day of life is 63.6±5.6 ml/kg/day.
The Rate of Diuresis
We analyzed the rate of diuresis. It was normal 2.2±1.2 ml/kg/hour in the first group on DOL 1. Diuresis increased significantly on DOL 3 up to
3.6±1.6 ml/kg/hour. The maximal rate of urination 6.1±1.4 ml/kg/hour was on DOL 5.
Despite the fact that most literary sources describe a significant decrease in diuresis up to oligoanuria which is associated with the COX inhibitors using, we did not observe this in our own experience. Diuresis, despite the significant limitation of infusion therapy, was in the normal range for the patient's age in all groups and in all stages of the study (Fig. 2). In our opinion, the temporal diuresis did not affect the term of arterial duct closure in the subjects.
ml/kg/h 6
1 Day 3 Day 5 Day 7 Day 14 Day
□ I group 1112 group
28 Day
Fig. 2. The rate of diuresis in 1 and 2 groups
Body Weight Dynamics
Regarding the dynamics of body weight, there is for PDA closure and the patient's weight loss was a physiological weight loss in the completely healthy planned and even desirable. The weight loss obser-newborns in the first 3-4 days. In our subjects, we ved in the first group was (-7.1%±4.6) up to third used restrictive infusion therapy (50-80 ml/kg/day) day of life (Fig. 3).
% WEIGHT
1 Day
3 Day
5 Day 7 Day 14 Day 2 8 Day
□ I group ^2 group
Fig. 3. Body weight dynamics
0
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On DOL 5, more negative dynamics of body weight was maintained (-10.3%±4.3). The maximum of weight loss was observed on DOL 7 and it was (-10.8±5.6). With the onset of enteral nutrition and increasing in the volume of infusion after PDA closure, the body weight deficit reduced to (-3.8%±3.0) and on DOL 28 there was positive dynamics in patient's weight (+ 9.8%±2.6).
It should be noted that the degree of weight loss on DOL 3, 5, 7, 14 was closely related to the term of arterial duct closure. In the second group, the degree of weight loss at all stages was slightly higher than in the first group.
The arterial duct was closed in all groups in 100% of cases. Mortality in all groups was 0%. The pharmacological PDA closure was successful in 100% (40 preemies) of cases in the first group and in 70% (16 preemies) of the second grope (Table). In the second group the PDA closure occurred in a delayed period (more than 4 days) on DOL 14.55±0.56 on average. In the first group, the PDA closure occurred earlier on DOL 2.35±0.48 on average. 6 children (30%) of the second group had surgical clapping of the arterial duct in a delayed period (on average after 23 days). Recanalization of the arterial duct was found in 6 children (30%) after DOL 20.
Methods and terms of the PDA closure
Indicator
2 Group
1 Group
Diameter of PDA in DOL1
Terms of PDA closure
Pharmacological PDA closure
Surgical PDA closure
Recanalization of PDA
Indomethacin using as 1st course
Ibuprofen using as 1st course rectal form
Ibuprofen using as 2st course intravenous form
3,1±1,0 mm 14,55±0,56 DOL 70% 30% 30% 84% 16% 40%
2,8±0,5mm 2,35±0,48DOL 100% 0% 0% 85% 15% 0%
It should be noted that in the first group in all cases the arterial duct was closed pharmacologically and there was no PDA recanalization comparing to the second group.
Analyzing the data, we can summarize the following: the mortality rate in all groups was 0% and the PDA closed in 100% of cases. The PDA has been closed in the second group with liberal infusion therapy in delayed period after DOL 4, on 14.55±0.56 DOL on average. In the first group with restrictive infusion therapy, the PDA closure occurred earlier on DOL 2.35±0.48. 6 children (30%) from the second group had surgical clapping of the PDA in a delayed period (on DOL 23 in average). In the first group, in contrast to the second group, there was no case of PDA recanalization, so there was no need for surgical treatment. Diuresis was in normal range for age in all groups during the study, despite the significant fluid limitation.
Conclusions
The combination of COX inhibitor with the strict adherence to the restriction of infusion in the first 5 days is considered to be a principle for the early
closure of the arterial duct. The recommended volume of infusion for the successful PDA closure should be - 50 ml/kg/day for DOL 1, and 60 ml/kg/day for DOL 3. The recommended weight loss for the successful PDA closure should be - 7% for DOL 3 and up to - 10% for DOL 5. The rate of diuresis did not affect the term of arterial duct closure in the subjects. Exact adherence to a combination of COX inhibitors and restrictive infusion therapy is more likely to contribute to the pharmacological closure of the ductus arteriosus and reduce the percentage of children who need surgical ligation of the ductus. The use of restrictive therapy and earlier closure of the arterial ductus reduces the percentage of such terrible complications in premature babies as BPD, IVH, NEC, ROP, which decreases the risk of disability in these children. Early pharmacological PDA closure reduces length of hospitalization as well as the cost of treatment.
Perspectives
The open arterial duct should be pharmacologically closed at early stage with the help of COX inhibitors (indomethacin, ibuprofen) in combination
with restrictive infusion therapy. We are planning to study effects of rectal and intravenous forms of paracetamol as COX inhibitors for the pharmacological closure of PDA as the main or second course, but no more than 7 days.
List of Abbreviations
BPD - bronchopulmonary dysplasia
COX - cyclooxygenase
DOL - day of life
ELBW - extremely low birth weight
GA - gestational age
HPDA - hemodynamically significant patent duc-tus arteriosus
IVH - intraventricular hemorrhage
MV - mechanical ventilation
NEC - necrotizing enterocolitis
NICU - neonatal intensive care unit
NIV - non-invasive ventilation
NSAIDs - non-steroidal anti-inflammatory drugs
PDA - patent ductus arteriosus
PVL - periventricular leukomalacia
RDS - respiratory distress syndrome
ROP - retinopathy of prematurity
RI - Resistant Index, an index of resistance
VLBW - very low body weight
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Crarra Haginm^a go pega^ii' 18.02.2019
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УДК 616.12-008.331.1:616.24-007.272-036-06 https://doi.Org/10.26641/2307-0404.2019.2.170128
О.Л. Архткта особливост1 кл1н1чного переб1гу
хрон1чного обструктивного захворювання легень у хворих на гшертошчну хворобу
Харювський нацюнальний медичний yuieepcumem пр. Науки, 4, XapKie, 61000, Украша Kharkiv National Medical University Nauka av., 4, Kharkov, 61000, Ukraine e-mail: arkhipkina. o.l@gmail. com
Цитування: Медичт перспективи. 2019. Т. 24, № 2. С. 40-45 Cited: Medicniperspektivi. 2019;24(2):40-45
Ключовi слова: xpoHiurn обструктивне захворювання легетв, гiпертонiчна хвороба, поеднаний переб^ Ключевые слова: хроническое обструктивное заболевание легких, гипертоническая болезнь, сочетанное течение
Key words: chronic obstructive pulmonary disease, hypertension, combined course
