Absolute quantification of cholesteryl esters using liquid chromatography-tandem mass spectrometry uncovers novel diagnostic potential of urinary sediment

BACKGROUND

Urine has been utilized as a source of biomarkers in renal disease. However, urinary lipids have not attracted much attention so far. Here we studied urinary cholesteryl ester (CE) and its relevance in renal disease.

METHODS

Quantitative analysis of CE molecular species in serum, urinary supernatant, and urinary sediment from patients with renal disease (N=64) and non-renal disease (N=23) was carried out using liquid chromatography-tandem mass spectrometry (LC-MS/MS) and deuterated CEs as internal standards.

RESULTS

Validation study showed good precision and accuracy of LC-MS/MS. Many CE species were detected in the urinary sediment and supernatant in the renal disease group, whereas only a few CE species were detected in the other group. In the renal disease group, the sum of the concentrations of all CE species showed a significant correlation between the sediment and the supernatant from urinary samples (r=0.876, p<0.001); however, the composition of CEs was significantly different between them. Further, the composition of CEs of the supernatant was similar to that of the serum.

CONCLUSIONS

Our LC-MS/MS analysis uncovered a distinct CE profile in urinary sediment from patients with renal disease, suggesting a possible contribution of CEs in urothelial cells to the development of renal disease.

Vaginal Cuff Dehiscence after Hysterectomy and One Minute Technique of Laparoscopic Vault Closure

Aims: This study was done to observe the rate of vaginal cuff dehiscence of one minute technique of laparoscopic vault closure in laparoscopic hysterectomy.Methods: It was a descriptive study performed in Birat Hospital among 1012 patients undergoing total laparoscopic hysterectomy for both benign and malignant gynaecological conditions between 2012 to 2013. Monopolar cautery was used for laparoscopic colpotomy and vault was closed by laparoscopic single running suture, that is, one-minute laparoscopic vault closure technique. Patients were followed up for vaginal cuff dehiscence and the dehiscence rate was compared with other techniques of laparoscopic vault closure in laparoscopic hysterectomy.Results: This study showed that the rate of vaginal cuff dehiscence after one minute technique of laparoscopic vault closure in laparoscopic hysterectomy was 1/1012 patients (0.09%) which was significantly less as compared to other techniques of laparoscopic vault closure in laparoscopic hysterectomy quoted in the literature.Conclusions: One minute technique of laparoscopic vault closure after colpotomy with monopolar cautery using single running suture has encouraging results. It is a noble technique of laparoscopic vault closure with excellent support. It can be practiced in low resource setting also.

Acute Upper Gastrointestinal Bleeding in a Tertiary Care Centre of Nepal

INTRODUCTION

AUGIB is characterized by hematemesis or melena or both. Peptic ulcers and variceal bleed account for majority of cases. Use of proton pump inhibitors in current era is associated with a gradual reduction in burden of peptic ulcer disease. We conducted this study to look into the cause of AUGIB in our community.

METHODS

We studied 100 patients in one year period who presented to us with hematemesis or melena. The study was conducted in department of Gastroenterology, Bir hospital, Kathmandu. We identified the culprit lesions by upper gastrointestinal endoscopy.

RESULTS

The average age of patients with AUGIB was 51.6 years with 59 (59%) males. Duodenal ulcers are most common 29 (29%), followed by varices 23 (23%) and gastric ulcers 14 (14%). More than one lesion was identified in 38 (38%) patients. Patients with variceal bleed were more likely to present with hematemesis alone as compared to those with ulcer bleed (P=0.005). Variceal bleed patients presented earlier to the hospital (P=0.005), had lower MAP at presentation (P=0.0002), had lower hemoglobin level (P=0.0001) and higher serum creatinine level at presentation (P=0.001). Patients with variceal bleed were more likely to have consumed alcohol 20 (86.9%) and patients with ulcer bleed were more likely to be smokers 29 (67.4%) or consume tobacco 14 (32.5%) (P=0.006).

CONCLUSIONS

Ulcer related bleeding is still the most common cause of AUGIB. Many patients with AUGIB have more than one lesions identified during upper gastrointestinal endoscopy.

Approximation of Height of an Individual Using Somatometry of Human Male Skull

INTRODUCTION

Numerous population specific studies conducted on skeletal remains have aimed to standardize the identification process. Known for ethnic and sexual variations, skull bone can also assist the identification process by estimating stature of the individual. The present study focuses on estimation of stature from skull bone using uni-variate and multi-variate regression models in south Indian population.

METHODS

Stature and maximum cranial length, maximum cranial breadth, bi-pterion breadth, parietal cord and upper facial breadth were measured in wet skulls of 113 males, autopsied at Government Hospital of Kudla, Karnataka.

RESULTS

All five measurements showed significant correlation with stature (P value <0.001). MCL showed the highest (r=0.77) and UFB the lowest (r=0.42) degree of correlation. Standard error of estimate was lowest for MCL (4.90 cm) in the derived uni-variate regression models. In the regression model obtained from the multi-variate analysis using all five skull measurements the β-coefficients were significant (P value <0.001) and the Standard Error of Estimation of the model was observed to be 4.45 cm. Bland-Altman analysis was conducted to explore the agreement between the actual length and the estimated lengths from the multivariate regression model. The mean of difference was 0.105 with a standard deviation of 4.3 and the upper and lower limits of agreement were 8.5 and -8.3 respectively.

CONCLUSIONS

The study concludes that stature can be estimated from skull measurements with reasonable accuracy, observations of multi-variate regression models being more precise than the uni-variate regression models. Data collected from South India was compared with data available for Nepalese population and validates the use of data of Indian population for extrapolation in Nepalese population.

Displaced Intra-Articular Calcaneal Fractures: Evaluation of Clinical and Radiological Outcome Following Open Reduction and Internal Fixation with Locking Branched Calcaneal Plate

Background Calcaneal fractures are common, but are difficult to manage. Immediate concern is soft tissue problems, while long term concern is pain as a sequelae of subtalar arthritis. A consensus has not been reached in the management of calcaneal fractures. Objective This study aims to evaluate clinical and radiological outcomes of the patients managed with open reduction and internal fixation with Calcaneal Locking Plates for the displaced intra-articular calcaneal fractures presenting in Dhulikhel Hospital, Kathmandu University Hospital. Method This was a prospective study, conducted on displaced intra articular calcaneal fractures from January 2014 through December 2016. The patients underwent open reduction and internal fixation with Locking Branched Calcaneal Plates through the extensile lateral approach. Post-operatively, ankle was mobilized after two weeks. Weight bearing was started after 12 weeks. Patients were evaluated clinically with Maryland foot score and radiologically with measurements of Boehler's and Gissane angle. Result Twenty-two cases of calcaneal fractures managed with open reduction and internal fixation with Locking Branched Calcaneal Plates were available for final evaluation. Seventeen of the enrolled patients were males in their third decade of life. On average, calcaneal fractures were operated on seven days after the injury. Sanders Type II were seen in 68.2% of the cases and Sanders Type III were in 31.8%. Mean follow-up duration was 21.5 months. The average Maryland foot score was 77.27. Seventeen cases (77.13%) had good, four cases (18.2%) had fair, and one case (5.5%) had poor outcome score. There was statistically significant improvement in Boehler's and Gissane angle across all enrolled patients. Conclusion Displaced intra-articular calcaneal fractures treated operatively with open reduction and internal fixation with Locking Branched Calcaneal Plates through the extended lateral approach, with proper planning of operation and surgical techniques in soft tissue handling, results in good clinical as well as radiological outcomes.

Fluoroscopy Guided Percutaneous Transpedicular Biopsy for Thoracic and Lumbar Vertebral Body Lesion: Technique and Safety in 23 Consecutive Cases

Background Though some vertebral lesions have typical imaging findings, histological/ microbiological evidence are required for definitive diagnosis and management, specially for tumor and infective lesions so that wrong diagnosis and wrong treatment can be avoided. Conventionally, open biopsy methods are used. With availability of CT scan, MRI, percutaneous transpedicular vertebral biopsy has now become popular as a minimally invasive technique for biopsy of vertebral lesion.Objective To describes technique and to analyzes safety and feasibility of percutaneous transpedicular vertebral biopsy with fluoroscopy guidance for thoracic and lumbar vertebral body lesions.Method Twenty three patients who underwent percutaneous transpedicular vertebral biopsy under fluoroscopy guidance were retrospectively evaluated for demographic data, indication for biopsy, anatomical locations, histological/microbiological diagnosis, complications and final outcome of treatment. True positive, true negative, false positive and false negative cases were defined.Result There were 17 males and 6 female patients of mean age 47 (range 22-73 years). Biopsies were performed in 17 dorsal and six lumbar vertebral bodies. Adequate sample were obtained in all cases. Seventeen patients (12: tubercular pathology, 1: primary tumor, 3: metastasis, 1: osteoporotic fracture) had definitive histological/ microbiological diagnosis. Four patients had no granuloma and tumor. Two had histological features of chronic non specific inflammation. True positive cases were 17, true negative were four and false negative case were two. Overall accuracy was 92%. One patient developed small hematoma at biopsy site.Conclusion Fluoroscopy guided percutaneous transpedicular biopsy of is a safe procedure with high adequacy and accuracy and low complication rate for thoracic and lumbar vertebral body lesion.

Study of Pre-disposing Factors of Acute Exacerbation of Chronic Obstructive Pulmonary Disease and Antibiotic Prescribing Pattern with Reference to Antibiotic Sensitivity Test

Background Chronic Obstructive Pulmonary Disease (COPD) affects about 329 million people worldwide, which is nearly 5% of the entire global population. In the context of Nepal, COPD accounts for 43% of the non-communicable disease burden and 2.56% of hospitalizations. Various pre-disposing factors like bacterial, viral, fungal, smoking, occupational exposures and genetic factors have been proposed to precipitate COPD and its exacerbation though, the definitive pre-disposing factors and factors related to acute exacerbation have not been determined in the context of Nepal.Objective To find out the pre-disposing factors and the related causative agents for COPD.Method A cross sectional study was conducted in a tertiary care hospital. Patients of all age group who were diagnosed as COPD and admitted in the hospital were included in this study. Patients were interviewed using structured questionnaire. The socio-demographic data including personal and medical history were recorded from those participants. In addition, sputum from those patients was sent for culture to investigate the possible responsible pathogens as well as its antibiotic sensitivity pattern.Result A total of 150 patients having Acute Exacerbation of Chronic Obstructive Pulmonary Disease (AECOPD) who have admitted from either emergency or out-patient department of the hospital were included in this study. Among the total number of patients, more than half of them were female (n=82). In addition, analysis of occupations shows that most of them were either farmer (36.0%) or housewife (30.7%). In total studied patients (n=150), most of them were using traditional firewood (83%) for cooking purpose and majority of patients (91%) were smokers. Most of the sputum samples show growth of gram-positive cocci (26.7%) and gram negative bacilli (27.5%). Considering the overall sensitivity pattern, the higher sensitivity was recorded for Co-trimoxazole and Ciprofloxacin while higher rate of resistance was noted for Penicillin group of drugs. The most widely used antibiotics were found to be Cephalosporin group of drugs (68%).Conclusion The present study revealed that the case of COPD is more in female and the commonest pre-disposing factor is found to be smoke/firewood. Cephalosporin group of drugs is the most commonly prescribed drug.

Study of Clinical Variables Affecting Long Term Outcome after Microdisectomy for Lumbar Disc Herniation

Background Outcome of lumbar disc herniation are influenced by various clinical, socioeconomic and psychological factors. In the absence of provision of medical insurances, worker’s compensation and sick leave, predictors for outcome after lumbar disc herniation surgery will be different in Nepalese population.Objective To evaluate different clinical variables that can affect outcome after lumbar disc herniation surgery.Method Among 88 patients who underwent microdisectomy for lumbar disc herniation, 63 patients (43 male, 20 female) with follow up at least six months were retrospectively evaluated for clinical variables which can affect Oswestry disability index (ODI) score, its interpretation and Mcnab classification of post operative outcome.Result Average age of patients was 42.54±8.60 years. Mean follow up period was 34.89±23.80 months (range 6 -111 months). Thirty four patients had follow up period > 24 months. Mean ODI score before surgery and at final follow up was 37.87±8.76 vs 7.78±7.7; (p=0.00). Success rate was 90.47% (change in ODI score at least by 10), 93.65% (ODI score interpretation <40%), and 85.71%. (Mcnab outcome excellent and good). Significant correlation was found between age and ODI at final follow up but not with duration of symptoms. Male, non alcoholic, low level of education, numbness as a predominant symptom, disc at L4-L5 were significantly associated with better ODI at final follow up. For ODI score interpretation, gender, smoking habit, presence of leg pain as a predominant symptom were statistically significant factors whereas smoking and drinking habit, level of education, occupation, back pain and numbness as predominant pre-operative symptom, types of disc in MRI were significantly related to Mcnab outcome. There was 9.5% peri- or post-operative complications and recurrence in seven patients.Conclusion Age, gender, smoking and drinking habit, level of education, occupation, types of disc in MRI are important variables for ODI score, ODI score interpretation and Mcnab outcome.

Correlation between Endoscopic and Histopathological Findings in Gastric Lesions

Background Stomach is a common site for wide variety of lesions. The visualisation of the site with biopsy leads to the early detection of the pathologic process and appropriate therapy.Objectives The objective of this study is to correlate the histopathological pattern of endoscopic biopsies with distribution of gastric lesions according to age and sex.Method The retrospective study was carried out among 50 cases with endoscopic biopsies and histopathological assessment, received at Department of Pathology, Dhulikhel Hospital- Kathmandu University Hospital.Result Out of 50 cases majority of cases were of male gender with male: female ratio was 1.3:1. Our study showed a poor correlation between endoscopic and histopathological evidence of inflammation in the stomach. Two cases were diagnosed as intestinal metaplasia which were diagnosed as ulcer and erosion endoscopically. Out of 32% of cases diagnosed endoscopically as ulcer, only one case was confirmed histopathologically. Our study showed good correlation in the cases of carcinoma. Out of 17 cases diagnosed endoscopically as gastric carcinoma correlated histopathologically as gastric adenocarcinoma. Majority of carcinoma cases showed ulcerating fungating growth followed by ulcero-proliferative growth.Conclusion Endoscopy is incomplete without biopsy and histopathology is the gold standard for the diagnosis of endoscopically detected lesions. Endoscopic examination and histopathological examination of suspected gastric lesions should go parallel and neither should be a substitute of each other.

Current Diagnostic Approach and Initial Treatment Patterns for Renal Colic in Emergency Department

BACKGROUND

Renal colic is a common clinical presentation in emergency. The goal of this study was to describe the epidemiology, current diagnostic and treatment strategies of ureteric colic in our emergency department.

METHODS

This is a retrospective study performed over a six months period of patients with clinically suspected renal colic. Data collected included age, sex, urine analysis, ultrasound studies regarding size, site of the stone and presence of hydronephrosis. Comparative statistical analysis was performed using SPSS 12.2 software.

RESULTS

Among the total 201 cases, 134(67%) had ultrasound performed which yielded ureteric stone in 61/134 (45.5%) cases, out of which 52.5% (32/61), 32.8% (20/61) and 14.8% (9/61) had stones measuring 5-9.9mm, ≤ 4.9mm and ≥ 10mm respectively. The mean age was 31.6±11 with male: female of 3:1. Hydronephrosis was strongly correlated with the presence of ureteric stone (sensitivity -85.2%, specificity-94.5%, positive predictive value-92.9% and negative predictive value of 88.5%) and was significantly more common with larger stones (p=0.05). Hematuria and pyuria was present among 44.3% (27/61) and 31.1% (19/61) of the ultrasound confirmed ureteric stones respectively. Nonsteroidal anti-inflammatory drugs and smooth muscle relaxants were the most common drug offered.

CONCLUSIONS

Ultrasound to detect hydronephrosis, which is the most significant finding, may help to establish the probability of obstruction due to clinically important stone. Absence of hydronephrosis probably suggests small or passed out calculus requiring no immediate urological intervention or may indicate alternate diagnosis. Presence or absence of hematuria cannot be reliable diagnosing and excluding ureteral stones.

Study of Adherence Pattern of Antidepressants in Patients with Depression

Background Depression is one of the leading psychiatric disorders of the world affecting a person's mood, physical health and behavior. It is not permanent and is neither a character flaw nor a lack in discipline for a person to be ashamed of. It is a disorder that is reliably diagnosed and successfully treated. Antidepressants are the standard and the most efficacious approach to treating people with depression. However, adherence to treatment is necessary for achieving effectiveness. The result of nonadherence is severe and may cause therapeutic failure resulting in poor quality of life. Objective To determine the medication adherence pattern in patients with depression and assess the factors associated with non-adherence to the prescribed antidepressant therapy. Method Patients meeting the inclusion criteria who were diagnosed with depression were taken for the study. Informed consent was taken from the patients or from their relatives in case of their incapability. They were then interviewed using structured questionnaire. Result Among the 60 patients included in the study, 78% of them were females. Most of the patients 43% (n=26) were prescribed with atypical antidepressants. Less number (37%) of the patients were adherent to the antidepressant therapy. 68% of the females were non adherent. 82% of housewives were not adherent to therapy. Forgetfulness was the main reason for missing dose in majority (50%) of the nonadherent patients. Conclusion Majority of the patients with depression were non-adherent to medication. Forgetfulness was the major reason for missing dose in these patients.

Hormonal Changes in Intracranial Hemorrhage

INTRODUCTION

The purpose of this study was to investigate the changes of serum ACTH and Thyroid hormone level in the acute phase of ICH.

METHODS

Sixty patients with spontaneous ICH were assessed regarding hormonal changes by measuring ACTH and Thyroid hormone level. The relationships of hormone concentrations to clinical and radiological parameters were evaluated at hospital admission (t0), 5 days (t1) and 10 days (t2). The results were statistically analyzed.

RESULTS

ACTH, TSH, Thyroxine, and free Thyroxine were not significantly different among the three time periods (P > 0.05), while Triiodothyronine (T3) and free Triiodothyronine (FT3) were significantly different (P < 0.05). T3 and FT3 were not significantly different among patients with hemorrhage of different locations (P>0.05). There were significant negative correlations between T3 and FT3 with volume of ICH (r=-0.63 and r=-0.25) and there were positive correlations between T3 and FT3 with GCS (r=0.63 and r=0.37) respectively on admission day (p <0.05).

CONCLUSIONS

Hormonal secretion patterns is associated with the severity of ICH. This is an important index to evaluate the disease severity and prognosis.

Maternal and Fetal Outcomes of Adolescent Pregnancies at Patan Hospital

Aims: This study aims to review obstetric and neonatal outcome and risk factors in adolescent pregnant women and to compare perinatal outcomes with the adult group.Methods: This is a retrospective comparative study in between primiparous pregnant teenager women aged 15-19 years and   20-24 years from April 2012 to April 2013 in Patan Hospital Lalitpur, Nepal. The data was retrieved from the hospital records. Frequency of prenatal care, perinatal outcome (newborn’s weight and gestational age at delivery), mode of delivery and maternal complications if any were recorded.  Results: Neonates with normal birth weight (>2.5-4 kg) was seen in 70% (n=248) of the adolescent age group and 85% (n=1797) of adult age group. Neonates with low birth weight (<2.5 kg) was significantly higher in the adolescent age group with 29% (n=102) than the adult age group with only 13% (n=287). The occurrence of premature rupture of membrane and preterm premature rupture of membrane also show statistically significant association (Chi-square test p-value 0.000) on mother’s age having 18% and 2% respectively in adolescent pregnancy.Conclusions: There was significant association of neonatal complications like still birth, fetal distress, and meconium aspiration with the adolescent pregnancy. There was no significant association between neonatal death and age of mother. 

Mass Spectrometric Quantification of Amphipathic, Polyphenolic Antioxidant of the Pacific Oyster (Crassostrea gigas)

A novel amphipathic phenolic compound, 3,5-dihydroxy-4-methoxybenzyl alcohol (DHMBA), that can be isolated from the Pacific oyster (Crassostrea gigas) has been found to protect human hepatocytes against oxidative stress. This study aims to establish a method for the measurement of DHMBA for industrial application. Liquid chromatography-tandem mass spectrometry using deuterated DHMBA as an internal standard and a polar end-capped ODS (Hypersil GOLD aQ) as the solid phase was validated. The limit of detection was 0.04 pmol (S/N = 5), and the limit of quantitation was 0.1 pmol (S/N = 10). The calibration curve was linear throughout the range of 0.1 - 16 pmol (r(2) = 0.9995). This method successfully quantified DHMBA in oysters from 11 sea areas in Japan. The results showed that the yield of DHMBA was variable from 9.8 to 58.8 μg g(-1) whole oyster meat wet weight but not affected by the seawater temperature. The proposed LC-MS/MS method is useful in quantitative studies for DHMBA and potentially for other amphipathic substances.

A Cross-Sectional Study of Medication Adherence Pattern and Factors Affecting the Adherence in Chronic Obstructive Pulmonary Disease

BACKGROUND

Chronic obstructive pulmonary disease (COPD) is considered as a major health problem, associated with mortality and morbidities. Various disease management strategies have been established to optimize patient's longevity and functional status where patient adherence to the prescribed treatment plays a key role. Poor adherence to medication is common among COPD patients and is affected by number of factors like number of medicines, delivery devices and patient-related factors.

OBJECTIVE

This study aims to investigate the adherence pattern in the management of COPD and factors affecting patient adherence to the prescribed treatment.

METHOD

This study is a cross-sectional study which was conducted in a tertiary care hospital. Those patients suffering from COPD of all age were enrolled in this study and prior informed consent was obtained from patients. The structured questionnaire was used to interview those patients.

RESULT

Total 100 patients were enrolled in this study, among which most patients (45%) were of age groups 60-70 years. Unintentional non-adherence to medication attributed for 65% of patients and the major reason was forgetfulness (52.3%). Most patients had discontinued the medication due to experience of side effects (63.3%). The result showed significant association between adherence and polypharmacy (p=0.00). However, there was no significant association between adherence and age, sex, mode of administration of drugs, technics to use delivery devices etc.

CONCLUSION

Majority of COPD patients were elderly (mean age= 68.4 years). Forgetfulness was associated with medication non-adherence. Most of the patients had discontinued medication because of side effects. Polypharmacy is one of the major factors associated with non-adherence to medication in COPD.

Permanent Teeth Emergence Time and Sequence in Children of Kavre District, Nepal

Background Population specific standards on the timing and sequence of emergence of permanent teeth are essential in planning dental care for children. There is only a single study on the emergence of permanent teeth in Nepalese children. Objective To determine the standards for permanent teeth emergence time and sequence in children of Kavre district, Nepal. Method A descriptive cross sectional study was conducted in 623 children of age 5 to 14 years from six different schools of Kavre district. The number of permanent tooth erupted except third molar was recorded along with age and gender. Data were analysed using SPSS 20.0. Descriptive statistics was used to determine the number and percentage of permanent teeth emerged at different ages and the mean age of emergence of each tooth. Student 't' test was used to determine the inter jaw differences in the mean age of emergence of each tooth. Result The study population constituted 50.7% boys and 49.3% girls of the total sample. The first tooth to emerge was mandibular first molar, whereas maxillary second molar tended to be the last to emerge in both the genders. Though in general, mandibular teeth tended to precede the corresponding maxillary teeth in emergence but significantly only mandibular central, lateral and second premolar emerged earlier than maxillary.( p ≤ 0.05) Conclusion This study can be used as a reference data for clinical and academic purpose especially for the children of Kavre district, Nepal.

Study on Corticosteroids use Pattern in Dermatological Practice and Investigating Adverse Effect of Corticosteroids Including its Associated Factors

Background Corticosteroids are highly effective drugs with anti-inflammatory and immunosuppressive properties. Due to this, they have become a mainstay of pharmacotherapy in dermatology. However, improper and long term uses are associated with a number of serious adverse effects. Objective To investigate the corticosteroids use pattern, adverse effects and various factors associated with adverse effects in dermatological practice. Method A cross-sectional study was conducted in a dermatology department of tertiary care hospital. All patients using at least one corticosteroids, either topically or systemically or the combination were included in this study. Informed consent was taken from the patients and interviewed using structured questionnaire. Statistical analysis was performed by using SPSS 20. p-value < 0.05 was considered as statistically significant. Result Among the 60 participants under this study, 81.67% of them were females. The mean (±SD) age of the patients was 31.03 years (±15.0). A majority (58.30%) of the patients was prescribed with topical corticosteroids with low potency (25%). Most of them had used corticosteroids for urticaria. Adverse effects were reported by 33.30% of the patients. The most common adverse effect reported was the shedding of skin. Adverse effects was significantly associated with gender; use of systemic corticosteroids; regular use of corticosteroids; discontinuation of dose abruptly; and missed dose. However, there was no significant association between adverse effects and the duration of use of corticosteroids. Conclusion In conclusion, the present study suggested that the proper counselling and clear instruction regarding the use of corticosteroid should be provided to the patients for avoiding the abrupt discontinuation of the prescribed medication leading to treatment failure.

A fatty acid profiling method using liquid chromatography-high resolution mass spectrometry for improvement of assisted reproductive technology

BACKGROUND

Liquid chromatography-high resolution mass spectrometry (LC-HRMS) can be useful to improve in vitro fertilization (IVF). This study aims to find out an association between embryonic growth and embryonic uptake of free fatty acid (FFA) from culture media by using LC-HRMS.

METHODS

Embryos (n=55) from 15 couples undergoing IVF were studied. An embryo was cultivated for up to 6 days in a 20 μl-medium drop under mineral oil, and classified by a morphological grading system into the good-growth group (n=32; good quality blastocysts) and the poor-growth group (n=23; non-blastocysts). The control study was set up without embryo. Extracted ion chromatogram of FFAs was collected in negative-ion mode for each medium sample obtained after use.

RESULTS

The percent change from control to sample in mass area for docosahexaenoic acid showed a decrease in the good-growth group than that in the poor-growth group (p<0.05). Decrease in %change of docosahexaenoic acid might indicate proper embryonic growth. Similar but insignificant change was observed for other essential FFAs, but not for non-essential FFAs.

CONCLUSION

The proposed metabolomic approach using LC-HRMS might be a powerful tool for non-invasive evaluation of embryonic growth.