scholarly journals Evaluation of SpO2, PaO2, FiO2 levels in developing retinopathy of prematurity

2021 ◽  
Vol 8 (8) ◽  
pp. 1343
Author(s):  
Porimal Kumar Das ◽  
Shubhra Prakash Paul ◽  
Md Shamim Parvej Ibne Halim ◽  
Mohammad Abdullah Al Mamun ◽  
Mohammad Monir Hossain ◽  
...  
Keyword(s):  
Partial Pressure ◽  
Retinopathy Of Prematurity ◽  
Significant Risk ◽  
Population Data ◽  
Target Range ◽  
Partial Pressure Of Oxygen ◽  
Oxygen Inhalation ◽  
Background Retinopathy ◽  
Study Population ◽  
The Difference

Background: Retinopathy of prematurity (ROP) is a potentially blinding disease affecting the retinas in premature infants. In the treatment procedure of ROP, oxygen inhalation as well as the SpO2, PaO2, FiO2 levels analysis are some major concerns.Methods: This was a prospective COHORT study which was conducted at the special care baby unit (SCABU) and intensive care unit (ICU) of Dhaka shishu (children) hospital, Dhaka, Bangladesh from July 2012 to December 2014. Total one hundred (100) neonates of both sexes were finalized as the study population. Data were processed and analyzed using statistical software SPSS version 17, EPI info 7.Results: We found statistically significant risk for ROP, RR 3.48 (2.61-4.64) but there was no risk associated with FiO2 (24-32) % or 33-40 % in inhaled air. SpO2 (95-99) % was present in 25 (78.13%) of ROP (positive) neonates and 16 (23.53%) in ROP (negative) neonates. The difference was statistically significant (p<0.05) between the groups and RR 4.8 (2.51-9.28) for saturation of 95-99%. Partial pressure of oxygen >150 mm of Hg present in 12 (37.50%) cases of ROP (positive) neonates and 6 (8.82%) in ROP (negative) neonates. The difference was statistically significant (p<0.05) between the groups and RR 2.90 (1.83-4.5) for partial pressure of oxygen (>150) but there was no risk for partial pressure of 70-99 and 100-150 mm of Hg.Conclusions: During oxygen therapy FiO2 value, SpO2 value and more precisely the PaO2 value on neonate should be maintained within a target range.

scholarly journals Incidence of Retinopathy of Prematurity and Its Association with Oxygen Therapy in Preterm Low Birth Weight Babies

2016 ◽  
Vol 35 (3) ◽  
pp. 247-252 ◽  
Author(s):  
AK Pal ◽  
Somen Sur ◽  
AK Gupta
Keyword(s):  
Birth Weight ◽  
Low Birth Weight ◽  
Gestational Age ◽  
Retinopathy Of Prematurity ◽  
Oxygen Therapy ◽  
Significant Risk ◽  
Mechanical Ventilation Duration ◽  
Low Birth Weight Babies ◽  
Study Population ◽  
One Year

Introduction: The objectives of this study were to study the incidence and risk factors of retinopathy of prematurity (ROP) among preterm low birth weight babies and its association with oxygen therapy.Material and Methods: During one year study period, 50 neonates, who had fulfilled the inclusion criteria (born at gestational age ≤ 35 wks), were included in the present study. They were examined by indirect ophthalmoscopy by an ophthalmologist in NICU or ophthalmology outdoor. Staging of ROP was done according to the International classification. Data obtained from this study were entered in Microsoft Excel and subsequently analysed in SPSS version 20.0.Results: Among study population, 12 neonates (24%) showed evidence of retinopathy of prematurity, and Stage 2 ROP was most common (41.7%) within this group. Those neonates who had born ≤28 wks gestational age, showed more incidence (75%) of ROP. There was significant association between ROP and prematurity, low birth weight, mechanical ventilation, duration and concentration of oxygen therapy.Conclusion: Apart from prematurity and low birth weight, oxygen therapy also carries significant risk for ROP. Thus, judicious use of oxygen in premature babies can reduce incidence of ROP significantly.J Nepal Paediatr Soc 2015;35(3):247-252

scholarly journals Intraoperative partial pressure of oxygen measurement to predict flap survival

2018 ◽  
Vol 51 (03) ◽  
pp. 266-273
Author(s):  
Ankit Gupta ◽  
Akhil Kumar ◽  
Shyam Gupta ◽  
Sameek Bhattacharaya ◽  
Manoj Kumar Jha ◽  
...  
Keyword(s):  
Partial Pressure ◽  
Skin Flaps ◽  
Blood Gas ◽  
Partial Pressure Of Oxygen ◽  
Post Operative Period ◽  
Flap Monitoring ◽  
Oxygen Measurement ◽  
The Difference ◽  
Group 2 ◽  
Group 1

ABSTRACT Introduction: Flap monitoring using partial pressure of oxygen (pO2) is a proven modality. Instruments needed are expensive and are not readily available to a clinician. Here, pO2 of flap has been determined using readily available and cheap methods, and a cut-off value is calculated which helps in predicting flap outcome. Methods and Results: Total 235 points on 84 skin flaps were studied. Capillary blood was collected from flap and fingertip using 1-ml syringes after at least 30 min of flap inset, and pO2 analysed using blood gas analyser. Fall/change of pO2 (difference of mean of pO2 [diff-pO2]) was also calculated by subtracting the flap pO2 from the finger pO2. Flap was monitored clinically in post-operative period and divided into two groups depending on its survival with Group 1 – dead points and Group 2 – alive points. pO2 and diff-pO2 amongst both the groups were compared and found to be statistically different (P = 0.0001). Cut-off value calculated for pO2 was found to be <86.3 mmHg with a sensitivity of 100% and specificity of 89.05%. The difference of >68.503 mmHg of flap pO2 compared from finger pO2 was calculated as a cut-off with sensitivity of 94.12 and specificity of 79.60%. Conclusions: Flap areas having intra-operative pO2 value <86.3 mmHG have higher chances (60.71%) of getting necrosis later. Similarly, if diff-pO2 compared to fingertip is >68.5 mmHg, chances of those points getting necrosed in post-operative period are high.

scholarly journals Association of infection, blood transfusion and other clinical factors with retinopathy of prematurity (ROP)

2015 ◽  
Vol 5 (2) ◽  
pp. 325-328
Author(s):  
Shaheen Akter ◽  
Rubiya Parvin ◽  
BH Nazma Yasmeen ◽  
Kazi Shabbir Anwar ◽  
M Monir Hossain
Keyword(s):  
Birth Weight ◽  
Blood Transfusion ◽  
Retinopathy Of Prematurity ◽  
Very Low Birth Weight ◽  
Significant Risk ◽  
Stepwise Logistic Regression ◽  
Clinical Factors ◽  
Stepwise Logistic Regression Analysis ◽  
Oxygen Inhalation ◽  
Cumulative Volume

Background : In Bangladesh advancement of neonatal care has increased the survival of preterm very low birth weight (VLBW) neonates; thus the incidence of Retinopathy of prematurity (ROP) has also been increased.Objective : To identify the cases of ROP and to observe the association of birth weight, infection and other clinical factors (recorded during hospital stay) with its occurrence.Method : This was a prospective observational study at special care baby unit (SCABU) and Intensive care unit of Dhaka Shishu Hospital from July, 2006 to March, 2008 among premature ( 34 weeks) and/or VLBW ( 1500 gm) neonates. Neonates who fulfilled the inclusion criteria were followed up daily to record certain clinical factors and features suggestive of sepsis.Infants were divided into “No ROP group” that included newborns without ROP (n=35), and “ROP group” that included newborns with ROP (n=23). Comparative analysis of recorded clinical factors was done between the two groups.Result : Among the study neonates rate of ROP occurrence is 40% (23 of 58). VLBW, culture proven septicaemia, mean total hours of oxygen inhalation, mechanical ventilation, cumulative volume of blood transfusion, and intra ventricular hemorrhage (IVH) grade II were significantly related with ROP. Stepwise logistic regression analysis revealed birth weight [p=.004, Odds Ratio (OR), .33; Confidence Interval (CI), 0.14 to.436], culture proven septicaemia (p=.005; OR, 4.0 CI, 2.50 to 9.99) and cumulative volume of blood transfusion (p=.013; OR,.43; CI, .028 to .653) to be most significant factors.Conclusion : Rate of ROP occurrence in the current study is 40% and VLBW, culture proven septicaemia and large volume of blood transfusion are significant risk factorsNorthern International Medical College Journal Vol.5(2) 2014: 325-328

scholarly journals Prevalence and risk factors of retinopathy of prematurity

2012 ◽  
Vol 52 (3) ◽  
pp. 138 ◽  
Author(s):  
Cut Badriah ◽  
Idham Amir ◽  
Elvioza Elvioza ◽  
Evita Ifran
Keyword(s):  
Risk Factors ◽  
Retinopathy Of Prematurity ◽  
Significant Risk ◽  
Extremely Low Birth Weight ◽  
Chi Square ◽  
Discriminative Ability ◽  
Logistic Analysis ◽  
Background Retinopathy ◽  
Potential Risk Factors ◽  
Auc Value

Background Retinopathy of prematurity (ROP) is the main causeof visual impairment in premature infants. Due to advances inneonatal care, the increased survival of extremely low birth weight(ELBW) infants in recent years has produced a population ofinfants at very high risk of ROP.Objective The aims of this study were to determine theprevalence and potential risk factors for ROP.Methods This retrospective study was conducted at theNeonatalogy Ward, Cipto Mangunkusumo Hospital, fromJanuary 2005 to August 2010. We included all prematureinfants of gestational age (GA) < 37 weeks, body weight(BW) not exceeding 2000 grams, as well as those who hadeye examinations and complete medical records. Risk factorssuch as GA, BW, duration of oxygen (Oz) therapy, sepsis, andred blood cell (RBC) transfusion were analyzed using the Chi􀀻square and logistic regression tests. Pediatric ophthalmologistshad performed eye examinations on all infants. ROP was gradedaccording to the International Classification of ROP.Results The prevalence of ROP and of stage 3 or greaterROP was 11.9% and 4.8% of all subjects, respectively. Bodyweight, GA, duration of Oz therapy, and sepsis were found tobe associated with the development ofROP. However, stepwiselogistic regression analysis revealed that only BW of:s 1000g [odds ratio (OR) 10.88; 95% CI 3.09 to 38.31; P < 0.000],02 therapy 2: 7 days (OR 5.56; 95% CI 1.86 to 16.58; P <0.0001), and GA of oS 28 weeks (OR 4.26; 95% CI 1.15 to15.81; P = 0.030) were statistically significant risk factors forROP. The equation obtained was y 􀀃 -4.092 + 2.388 (BW)+ 1.451 (GA) + 1.716 (duration of 02 therapy). The modelshowed good calibration (a non􀀻significant Hosmer􀀻Lemeshowtest; P = 0.816) and discriminative ability. The area underthe curve (AUC) value was 92.2% (95% CI 0.867 to 0.976;P < 0.0001).Conclusion Prevalence ofROP in this study (11.9%) was lowerthan that of previous studies. By regression logistic analysis, themain risk factors for development ofROP were BW of:s 1000g, Oz therapy 2: 7 days, and GA :s 28 weeks. The probability ofROP occurrence increased v.ith greater number of risk factors.[Paediatr rndones. 2012;52:138-44].

Physical Illness and Suicide Risk in Rural Residents of Contemporary China

Crisis ◽  
2014 ◽  
Vol 35 (5) ◽  
pp. 330-337 ◽  
Author(s):  
Cun-Xian Jia ◽  
Lin-Lin Wang ◽  
Ai-Qiang Xu ◽  
Ai-Ying Dai ◽  
Ping Qin
Keyword(s):  
Risk Factor ◽  
Family Income ◽  
Rural China ◽  
Significant Risk ◽  
Significant Risk Factor ◽  
Health Condition ◽  
Physical Illness ◽  
Rural Residents ◽  
Increased Risk ◽  
Study Population

Background: Physical illness is linked with an increased risk of suicide; however, evidence from China is limited. Aims: To assess the influence of physical illness on risk of suicide among rural residents of China, and to examine the differences in the characteristics of people completing suicide with physical illness from those without physical illness. Method: In all, 200 suicide cases and 200 control subjects, 1:1 pair-matched on sex and age, were included from 25 townships of three randomly selected counties in Shandong Province, China. One informant for each suicide or control subject was interviewed to collect data on the physical health condition and psychological and sociodemographic status. Results: The prevalence of physical illness in suicide cases (63.0%) was significantly higher than that in paired controls (41.0%; χ2 = 19.39, p < .001). Compared with suicide cases without physical illness, people who were physically ill and completed suicide were generally older, less educated, had lower family income, and reported a mental disorder less often. Physical illness denoted a significant risk factor for suicide with an associated odds ratio of 3.23 (95% CI: 1.85–5.62) after adjusted for important covariates. The elevated risk of suicide increased progressively with the number of comorbid illnesses. Cancer, stroke, and a group of illnesses comprising dementia, hemiplegia, and encephalatrophy had a particularly strong effect among the commonly reported diagnoses in this study population. Conclusion: Physical illness is an important risk factor for suicide in rural residents of China. Efforts for suicide prevention are needed and should be integrated with national strategies of health care in rural China.

Interaction of H2O, O2 and H2 with Proton Conducting Oxides Based on Lanthanum Scandates

2019 ◽  
pp. 88-100
Author(s):  
A. S. Farlenkov ◽  
N. A. Zhuravlev ◽  
Т. A. Denisova ◽  
М. V. Ananyev
Keyword(s):  
Water Vapor ◽  
Partial Pressure ◽  
Gas Phase ◽  
Molecular Hydrogen ◽  
Proton Magnetic Resonance ◽  
Partial Pressure Of Oxygen ◽  
Proton Conducting ◽  
Conducting Oxides ◽  
Temperature Range ◽  
Apparent Level

The research uses the method of high-temperature thermogravimetric analysis to study the processes of interaction of the gas phase in the temperature range 300–950 °C in the partial pressure ranges of oxygen 8.1–50.7 kPa, water 6.1–24.3 kPa and hydrogen 4.1 kPa with La1–xSrxScO3–α oxides (x = 0; 0.04; 0.09). In the case of an increase in the partial pressure of water vapor at a constant partial pressure of oxygen (or hydrogen) in the gas phase, the apparent level of saturation of protons is shown to increase. An increase in the apparent level of saturation of protons of the sample also occurs with an increase in the partial pressure of oxygen at a constant partial pressure of water vapor in the gas phase. The paper discusses the causes of the observed processes. The research uses the hydrogen isotope exchange method with the equilibration of the isotope composition of the gas phase to study the incorporation of hydrogen into the structure of proton-conducting oxides based on strontium-doped lanthanum scandates. The concentrations of protons and deuterons were determined in the temperature range of 300–800 °C and a hydrogen pressure of 0.2 kPa for La0.91Sr0.09ScO3–α oxide. The paper discusses the role of oxygen vacancies in the process of incorporation of protons and deuterons from the atmosphere of molecular hydrogen into the structure of the proton conducting oxides La1–xSrxScO3–α (x = 0; 0.04; 0.09). The proton magnetic resonance method was used to study the local structure in the temperature range 23–110 °C at a rotation speed of 10 kHz (MAS) for La0.96Sr0.04ScO3–α oxide after thermogravimetric measurements in an atmosphere containing water vapor, and after exposures in molecular hydrogen atmosphere. The existence of proton defects incorporated into the volume of the investigated proton oxide from both the atmosphere containing water and the atmosphere containing molecular hydrogen is unambiguously shown. The paper considers the effect of the contributions of the volume and surface of La0.96Sr0.04ScO3–α oxide on the shape of the proton magnetic resonance spectra.

An analysis of malpractice litigation in the surgical management of carotid artery disease

2020 ◽  
Vol 132 (6) ◽  
pp. 1900-1906 ◽  
Author(s):  
Jack J. Haslett ◽  
Lindsey A. LaBelle ◽  
Xiangnan Zhang ◽  
J Mocco ◽  
Joshua Bederson ◽  
...  
Keyword(s):  
Carotid Artery ◽  
Perioperative Care ◽  
Carotid Artery Disease ◽  
Significant Risk ◽  
Search Terms ◽  
Jury Verdicts ◽  
Procedural Error ◽  
Legal Databases ◽  
The Difference ◽  
Artery Disease

OBJECTIVECarotid artery disease is a common illness that can pose a significant risk if left untreated. Treatment via carotid endarterectomy (CEA) or carotid artery stenting (CAS) can also lead to complications. Given the risk of adverse events related to treating, or failing to treat, carotid artery disease, this is a possible area for litigation. The aim of this review is to provide an overview of the medicolegal factors involved in treating patients suffering carotid artery disease and to compare litigation related to CEA and CAS.METHODSThree large legal databases were used to search for jury verdicts and settlements in cases related to untreated carotid artery disease, CEA, and CAS. Search terms included “endarterectomy,” “medical malpractice,” “carotid,” “stenosis,” “stenting,” “stent,” and combinations of those words. Three types of cases were considered relevant: 1) cases in which the primary allegation was negligence performing a CEA or perioperative care (CEA-related cases); 2) cases in which the primary allegation was negligence performing a CAS or perioperative care (CAS-related cases); and 3) cases in which the plaintiff alleged that a CEA or CAS should have been performed (failure-to-treat [FTT] cases).RESULTSOne hundred fifty-four CEA-related cases, 3 CAS-related cases, and 67 FTT cases were identified. Cases resulted in 133 verdicts for the defense (59%), 64 settlements (29%), and 27 plaintiff verdicts (12%). The average payout in cases that were settled outside of court was $1,097,430 and the average payout in cases that went to trial and resulted in a plaintiff verdict was $2,438,253. Common allegations included a failure to diagnose and treat carotid artery disease in a timely manner, treating with inappropriate indications, procedural error, negligent postprocedural management, and lack of informed consent. Allegations of a failure to timely treat known carotid artery disease were likely to lead to a payout (60% of cases involved a payout). Allegations of procedural error, specifically where the resultant injury was nerve injury, were relatively less likely to lead to a payout (28% of cases involved a payout).CONCLUSIONSBoth diagnosing and treating carotid artery disease has serious medicolegal implications and risks. In cases resulting in a plaintiff verdict, the payouts were significantly higher than cases resolved outside the courtroom. Knowledge of common allegations in diagnosing and treating carotid artery disease as well as performing CEA and CAS may benefit neurosurgeons. The lack of CAS-related litigation suggests these procedures may entail a lower risk of litigation compared to CEA, even accounting for the difference in the frequency of both procedures.

Biorhythm of the partial pressure of oxygen in uterine and fetal tissues

1981 ◽  
Vol 92 (4) ◽  
pp. 1305-1307
Author(s):  
A. Ya. Chizhov ◽  
V. G. Filimonov ◽  
Yu. M. Karash ◽  
R. B. Strelkov
Keyword(s):  
Partial Pressure ◽  
Partial Pressure Of Oxygen ◽  
Fetal Tissues

scholarly journals Risk Factors Associated with Retinopathy of Prematurity in Very and Extremely Preterm Infants

Medicina ◽  
2021 ◽  
Vol 57 (5) ◽  
pp. 420
Author(s):  
Claudia Ioana Borțea ◽  
Florina Stoica ◽  
Marioara Boia ◽  
Emil Radu Iacob ◽  
Mihai Dinu ◽  
...  
Keyword(s):  
Risk Factors ◽  
Preterm Infants ◽  
Gestational Age ◽  
Retinopathy Of Prematurity ◽  
Univariate Analysis ◽  
Significant Risk ◽  
Extremely Preterm ◽  
Extremely Preterm Infants ◽  
Surfactant Administration ◽  
Stage 1

Background and Objectives: Retinopathy of prematurity (ROP) is the leading cause of blindness in preterm infants. We studied the relationship between different perinatal characteristics, i.e., sex; gestational age (GA); birth weight (BW); C-reactive protein (CRP) and lactate dehydrogenase (LDH) concentrations; ventilation, continuous positive airway pressure (CPAP), and surfactant administration; and the incidence of Stage 1–3 ROP. Materials and Methods: This study included 247 preterm infants with gestational age (GA) < 32 weeks that were successfully screened for ROP. Univariate and multivariate binary analyses were performed to find the most significant risk factors for ROP (Stage 1–3), while multivariate multinomial analysis was used to find the most significant risk factors for specific ROP stages, i.e., Stage 1, 2, and 3. Results: The incidence of ROP (Stage 1–3) was 66.40% (164 infants), while that of Stage 1, 2, and 3 ROP was 15.38% (38 infants), 27.53% (68 infants), and 23.48% (58 infants), respectively. Following univariate analysis, multiple perinatal characteristics, i.e., GA; BW; and ventilation, CPAP, and surfactant administration, were found to be statistically significant risk factors for ROP (p < 0.001). However, in a multivariate model using the same characteristics, only BW and ventilation were significant ROP predictors (p < 0.001 and p < 0.05, respectively). Multivariate multinomial analysis revealed that BW was only significantly correlated with Stage 2 and 3 ROP (p < 0.05 and p < 0.001, respectively), while ventilation was only significantly correlated with Stage 2 ROP (p < 0.05). Conclusions: The results indicate that GA; BW; and the use of ventilation, CPAP, and surfactant were all significant risk factors for ROP (Stage 1–3), but only BW and ventilation were significantly correlated with ROP and specific stages of the disease, namely Stage 2 and 3 ROP and Stage 2 ROP, respectively, in multivariate models.

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