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  • Author: Aigars Pētersons x
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Abstract

Acute kidney injury (AKI) is a serious complication in the perioperative period and is consistently associated with increased morbidity and case fatality rate. This has been best studied in the cardiac surgery setting where it has been shown that up to 11.5–86.0% of patients exposed to cardiopulmonary bypass (CPB) will develop AKI, with 2.0–18.9% requiring renal replacement therapy (RRT). A prospective uncontrolled cohort study was conducted between 2011 and 2015, in which 93 children with various congenital heart lesions undergoing CPB were enrolled. Serum creatinine (SCr) level was determined by Jaffé’s method (Cobas 6000 analyser, Roche). Postoperative fluid balance was estimated as the difference between fluid intake and output. Data for further processing were retrieved from anaesthesia and intensive care data management system flowsheets (IntelliView, Philips). AKI developed in 42 patients (45.6%) by meeting at least KDIGO (Kidney Disease: Improving Global Outcomes) stage I criteria (with SCr rise by more than 50% from the baseline). Thirty eight patients complied with the 1st stage of AKI, three with 2nd stage and two with 3rd stage, according the KDIGO classification and staging system. One patient having severity stage II and two patients having severity stage III of AKI required initiation of RRT using peritoneal dialysis. Two patients from the RRT group survived, one died. The median intraoperative urine output was 2.32 ml/kg/h, (range from 0.42–5.87 ml/kg/h). Median CPB time was 163 min., median aortic cross-clamping time was 97.9 min., cooling during CPB to 29.5 °C. The diagnosis of AKI using SCr was delayed by 48 hours after CPB. Median fluid balance (FB) on the first postoperative day in non-AKI patients was 13.58 ml/kg (IQR 0–37.02) vs 49.38 ml/kg (IQR 13.20–69.32) in AKI patients, p < 0.001. AKI is a frequent complication after open heart surgery in children with congenital heart lesions. From 93 patients included in the study, 42 (45.2%) met at least KDIGO Stage I criteria for AKI. FB is a sensitive marker of kidney dysfunction. Median FB in the 1st postoperative day significantly differed between AKI patients: 49.38 ml/kg (13.20–69.32) versus 13.58 ml/kg in patients with intact kidney function (AUC = 0.84; p = 0.001). Thus it can be used as a marker of AKI.

Prenatal and Postnatal Diagnostics Problems of the Most Common Surgical Congenital Malformations of Newborns in Latvia

The most common surgical congenital malformations of newborns in Latvia are esophageal atresia (EA) with or without tracheoesophageal fistula (TEF), duodenal atresia (DA) and abdominal wall defects — gastroschisis (G) and omphalocele (O). Survival and quality of life of these patients depend on precise pre- and postnatal diagnosis, timely and qualified treatment, and presence of associated anomalies and prematurity. The aim of our study was to define prenatal and postnatal diagnostic problems of the most common surgical congenital malformations of new-borns in Latvia. Data concerning pre- and postnatal diagnostics from case-records of patients treated in Children's Clinical University Hospital from 1998 till 2008 with esophageal atresia (58 patients), duodenal atresia (20 patients) and congenital abdominal wall defects — gastroschisis (17 patients) and omphalocele (28 patients) were analysed. Results showed that in case of EA prenatal USG was performed in 62% of expectant mothers and in neither case suspicion about. EA was expressed. In all patients after birth diagnostic placement of nasogastric tube was performed. In approximately one-third catheter of bad opaqueness was used. Preoperative bronchoscopy and esophagoscopy in order to exclude upper tracheoesophageal fistula were performed in two patients from the analysed group. In 40% of cases DA was diagnosed in prenatal ultrasonography. G was diagnosed prenatally in 29.4%, O — only in 3.7%.

Abstract

Congenital thumb hypoplasia is a rare deformity of the upper extremity. Incidence of thumb hypoplasia type I–V was 2–3 and type IIIb-V was 0.5–1 per 20 000 newborns per year in Latvia. The classification of thumb hypoplasia was created by Blauth in 1967 (type I to V). The base of the metacarpal bone is absent for hypoplasia type IIIb–V; therefore, toe-to hand transplantation is not recommended. A stable first carpometacarpal joint has been considered a mandatory factor for successful toe-to-hand transplantation. A technique for toe-to-hand transplantation for thumb hypoplasia type IIIb–V patients has been described in literature but overall results were not better than pollicisation. The aim of this study is to describe a new technique for thumb reconstruction with a second toe transfer with metatarsophalangeal joint arthrodesis, which can provide a 5-digit hand and restore the functionality of the thumb for thumb hypoplasia IIIb–V. Long-term follow up was done to evaluate the functions and aesthetics of the hands. A survey to evaluate aesthetical outcome for the transplantation method and pollicisation method was completed by 290 respondents. The overall population rated the aesthetic outcomes of the new transplantation method significantly higher than for pollicisation (p < 0.0001).

Abstract

Total hip arthroplasty (THA) in patients with hip dysplasia is a challenging surgical operation. Many orthopedic surgeons concur that the anatomical placement of the acetabular components of endoprostheses (AC-EPs) during THA yields the best result. However, there are advocates of the high rotation center of the hip joint after replacement surgery. In our study, we compared the outcomes of THA based on the placement of acetabular cups to identify the most favorable site for AC-EPs in patients with varying grades of dysplastic osteoarthritis. Our study included 88 patients with dysplastic hip osteoarthritis who underwent 106 THAs during a three-year period using cementless fixation endoprostheses. Functional results were assessed by Merle d’Aubigne and Postel’s method and by instrumental gait analysis (IGA). Gait deviation index was calculated based on IGA to compare results in different acetabular component placement groups. Functional assessment of patients by Merle d’Aubigne and Postel’s grading method and IGA showed no significant difference in results due to the placement of the acetabular component. Most complications were found in the severe dysplasia patients group with the anatomical placement of the AC-EP. The appropriate location of cementless acetabular cups during THA in dysplastic hips depends on the grade of dysplasia, expected elongation of the leg, and the potential for adequate bone coverage for the AC-EP. In cases of severe dysplasia, the placement of the AC-EP in the secondary socket can provide a good functional outcome and reduce the risk of complications.

Spectrum and Frequency of the GJB2 Gene Mutations Among Latvian Patients with Prelingual Nonsyndromic Hearing Loss

Mutations in the GJB2 gene (connexin 26) are the most common cause of congenital nonsyndromic severe-to-profound hearing loss. Sixty-five hearing impaired probands from Latvia were tested for mutations in the GJB2 gene to determine the percentage of hearing loss attributed to connexin 26 and the types of mutations in this population. A total of 62% of patients tested had GJB2 mutations. Four different mutations in the GJB2 gene were identified in Latvian patients with nonsyndromic sensorineural hearing loss: 35delG, 311-324del14, 235delC and M34T. The most prevalent mutation is 35delG (47% of all probands were homozygous and 8% compound heterozygous). Our findings support the conclusion that the 35delG mutation is the most prevalent GJB2 mutation and that it is the common cause of hereditary nonsyndromic hearing loss in populations of European descent.

Abstract

Necrotising enterocolitis (NEC) is one of the leading causes of neonatal morbidity, mortality and surgical emergencies. As the survival rate of extremely low birth weight (ELBW) infants is rising, so is the risk of NEC. The aim of this study was to compare diagnostics parameters like clinical and radiological findings and laboratory indicators and the treatment and outcome of NEC patients from 2000 till 2007 (Group 1) and from 2008 till 2016 (Group 2) treated in Neonatology Clinic (NC) of Children’s Clinical University Hospital (CCUH). In the rectrospective study, 277 newborns were divided among Group I and Group II – 105 and 172 patients, respectively. There were no statistically significant differences between both study groups in mean gestational age and birth weight. In both groups the first signs of NEC appeared on average eight days after birth. Differences in the diagnostic method used in both groups were not statistically significant; specific radiological findings were seen in approximately 1/3 of the cases. There were statistically significant differences in the management of NEC and patient mortality. Conservative therapy was applied in 70.0% of patients in both study groups. Over time, peritoneal drainage (PPD) as the sole surgical treatment decreased by 6.4%, but PPD with following enterostomy decreased by 8.9%. In Group 2 mortality of NEC patients decreased by 17.4%. Mortality among surgically treated NEC patients decreased as well, by 9.0%.

Abstract

The aim of the study was to determine whether the Alvarado score (AS) together with laboratory tests could be used to distinguish patients with acute appendicitis (AA) from acute mesenteric lymphadenitis (AML). Fifty-seven patients (7–18 years) with suspected AA were included in the prospective study (October 2010 – October 2013). Thirty-one patients underwent surgery for AA and 26 were not treated surgically and were diagnosed AML on ultrasonography. AS, white blood cell count (WBC), C – reactive protein (CRP) and serum cytokines (EGF, IL-10, IL-12(p70), IL-1β, IL-4, IL-6, IL-8, IL-17, MCP-1, TNF-α) were obtained on admission and were compared between groups. Mean age of the 57 patients was 12.9 (SD 3.2). Accuracy (AR) for AS ≥ 7 alone was 73.7% for AA. Modified AS with certain serum cytokines seemed to be a reliable tool for initial differential diagnosis between AA and AML in school-age children. Based on these results, AS ≥ 7, WBC ≥ 10.7 × 103/µL and serum IL-6 ≥ 4.3 pg/mL assessed altogether will yield more sensitivity for AA. Also for further advanced diagnostics, we propose to take into account the serum IL-6, IL-8, MCP-1, CRP cut-off levels in the differential diagnosis between complicated and uncomplicated AA to decide whether the treatment should be conservative or surgical.

Abstract

Treatment strategies for acute uncomplicated appendicitis have evolved and now conservative antibacterial treatment is recommended over surgical treatment, especially for paediatric patients. The aim of this study was to evaluate microbiota in paediatric patients with acute uncomplicated and complicated appendicitis, and antibacterial susceptibility of the causative microorganisms. Bacteriological identification was conducted using the VITEK2 analyser. Antibacterial susceptibility tests were performed and the results were evaluated in accordance with the recommendations of the European Committee on Antimicrobial Susceptibility Testing (EUCAST) “Clinical breakpoints and dosing of antibiotics” (Version 7.0, January 2019). Serodiagnosis of Yersinia enterocolitica was performed using indirect haemagglutination. The results revealed differences in microbiota in cases of acute complicated and acute uncomplicated appendicitis. Pseudomonas aeruginosa was identified more frequently in cases of acute complicated appendicitis. Mixed culture was prevalent in cases of both acute complicated and acute uncomplicated appendicitis. Very few positive extended spectrum beta-lactamase (ESBL) Escherichia coli cultures were identified. Most of strains of Pseudomonas aeruginosa were resistant to amoxicillin with clavulanic acid, ertapenem, ampicillin and cefotaxime. Some of E. coli isolates were resistant to ampicillin and to amoxicillin with clavulanic acid.