1.Microsurgical reversal of sterilisation - is this still clinically relevant today?
Annals of the Academy of Medicine, Singapore 2010;39(1):22-26
INTRODUCTIONWomen with previous tubal sterilisation seeking fertility are faced with treatment options of reconstructive tubal surgery or in vitro fertilisation (IVF) techniques. The aim was to assess the current viability of tubal anastomosis in a local clinical practice.
MATERIALS AND METHODSA retrospective cohort review of all sterilisation reversal cases from January 1998 to January 2008. The main outcome measures included fi rst pregnancy success and live birth after surgery. Subsequent live births, ectopic pregnancies, miscarriages, duration of surgery and hospitalisation within the study period were also reported. We included cases aged less than 40 years, without any known semen abnormalities, and performed by only one operator. Cases with only unilateral reversal were excluded.
RESULTSNineteen cases with previous Filshie clip ligation (9 laparoscopic/10 open) were reviewed. Cumulative pregnancy rates with surgery were 47.4% (<6 months), 57.9% (6 to 12 months), 68.4% (12 to 48 months) and 73.7% (>48 months). Pregnancy (77.8% vs 70.0%) and live birth rates (66.7% vs 60.0%) were similar between laparoscopy and open surgery. The mean interval to pregnancy was marginally lower via laparoscopy (11.3 vs 13.6 months). Hospitalisation stay was significantly halved (1.43 vs 3.00 days) but ectopic pregnancies were increased 3-fold (3 vs 1) with laparoscopy. Compared with IVF, the estimated average cost per delivery for laparoscopic reversal was reduced for laparoscopic reversal with no multiple pregnancies.
CONCLUSIONOur results favour surgical reversal after sterilisation for patients younger than 40 years old. It avoids hyperstimulation risks and the economic burdens associated with multiple pregnancies. Where expertise is available, laparoscopic reversal should be performed.
Adult ; Age Factors ; Cohort Studies ; Female ; Fertilization in Vitro ; Humans ; Laparotomy ; adverse effects ; Microsurgery ; methods ; Pregnancy ; Pregnancy Rate ; Pregnancy, Ectopic ; etiology ; Retrospective Studies ; Sterilization Reversal ; adverse effects ; Sterilization, Tubal
3.Comparison of Formulae for Orotracheal Intubation Depth in the Paediatric Population.
Jen Heng PEK ; Elizabeth Mj TAN ; Ying HAO ; Gene Yk ONG
Annals of the Academy of Medicine, Singapore 2018;47(4):138-142
INTRODUCTIONMultiple formulae have been proposed for calculating orotracheal depth for paediatric intubation. However, literature on the validation of these formulae in the emergency department setting is limited. Three methods described in the local Advanced Paediatric Life Support curriculum include the Broselow tape, endotracheal tube (ETT) size x 3, and the age-based formula of age divided by 2, add 12. We aimed to determine their accuracy.
MATERIALS AND METHODSPatients with intubation performed in the Children's Emergency from 1 January 2009 to 31 December 2013 were included in this retrospective observational study. The depths of ETT placement based on the formulae were calculated from the actual depth of ETT. ETT position between T2 to T4 vertebral bodies of the chest radiograph was taken as the reference position for radiological accuracy.
RESULTSETT size x 3 has the highest accuracy of 76.5%, as compared to 67.9% for age-based formula and 63.5% for Broselow tape. When the formulae were inaccurate, Broselow tape often predicted a depth that was too shallow as compared to ETT size x 3 ( = 0.006) and age-based formula ( = 0.011). The accuracy of Broselow tape was not uniform across the age groups, with highest accuracy in patients 1 to 8 years old. ETT size x 3 had the highest accuracy in patients weighing more than 25 kg.
CONCLUSIONETT size x 3 was superior for determining orotracheal intubation depth but cannot preclude the confirmation of appropriate placement of ETT by auscultation and chest radiograph.
Airway Management ; standards ; Algorithms ; Child ; Female ; Humans ; Intubation, Intratracheal ; methods ; standards ; Retrospective Studies
4.Comparison between Single and Double Cleavage-Stage Embryo Transfers, Single and Double Blastocyst Transfers in a South East Asian In Vitro Fertilisation Centre.
Lee Koon KWEK ; Seyed Ehsan SAFFARI ; Heng Hao TAN ; Jerry Ky CHAN ; Sadhana NADA
Annals of the Academy of Medicine, Singapore 2018;47(11):451-454
INTRODUCTION:
This study investigated the differences in clinical pregnancy rate (CPR), live birth rate (LBR) and multiple pregnancy rate (MPR) between double cleavage-stage embryo transfers compared to single and double blastocysts stage embryo transfers in a single academic medical centre.
MATERIALS AND METHODS:
This was a retrospective cohort study performed at the KK Women's and Children's Hospital In Vitro Fertilisation (KKIVF) Centre of all women who underwent fresh-cycle in vitro fertilisation/intracytoplasmic sperm injection (IVF/ICSI) cycles over a 5-year period. The outcome measures were CPR, LBR and MPR. The study included 5294 cycles, of which 539 patients underwent single embryo transfer (SET); 4533 patients underwent double embryo transfer (DET); 84 patients underwent double blastocyst embryo transfer (DBT); and 65 patients underwent single blastocyst embryo transfer (SBT).
RESULTS:
The mean age of patients undergoing single blastocysts stage embryo transfer was lower than the other 2 groups. The DET, single and double blastocysts stage embryo transfer groups achieved similar LBR (33.9%, 38.7%, 35.4%, >0.05) and CPR (42.4%, 46.2%, 46.9%).
CONCLUSION
We found that single blastocysts stage embryo transfer is associated with similar LBR and CPR compared to double blastocysts stage embryo transfer and DET, with lower MPRs, and should be offered as standard practice, where possible.
Adult
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Cohort Studies
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Cryopreservation
;
methods
;
statistics & numerical data
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Embryo Transfer
;
adverse effects
;
methods
;
statistics & numerical data
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Female
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Fertilization in Vitro
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statistics & numerical data
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Humans
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Live Birth
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epidemiology
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Pregnancy
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Pregnancy Outcome
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epidemiology
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Pregnancy Rate
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Pregnancy, Multiple
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statistics & numerical data
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Retrospective Studies
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Singapore
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Single Embryo Transfer
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adverse effects
;
methods
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statistics & numerical data
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Sperm Injections, Intracytoplasmic
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statistics & numerical data
5.Obstructed Hemivagina and Ipsilateral Renal Anomaly--A Reproductive Surgical Unit's Experience.
Kai Lit TAN ; Edwin W H THIA ; Matthew S K LAU ; Steven B L TEO ; Jerry K Y CHAN ; Sadhana NADARAJAH ; Seong Fei LOH ; Veronique VIARDOT-FOUCAULT ; Heng Hao TAN
Annals of the Academy of Medicine, Singapore 2014;43(5):282-284
Abnormalities, Multiple
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surgery
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Adolescent
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Child
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Female
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Humans
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Kidney
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abnormalities
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Kidney Diseases
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Retrospective Studies
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Uterus
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abnormalities
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surgery
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Vagina
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abnormalities
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surgery
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Young Adult
6.A proteomic landscape of pharmacologic perturbations for functional relevance
Zhiwei LIU ; Shangwen JIANG ; Bingbing HAO ; Shuyu XIE ; Yingluo LIU ; Yuqi HUANG ; Heng XU ; Cheng LUO ; Min HUANG ; Minjia TAN ; Jun-Yu XU
Journal of Pharmaceutical Analysis 2024;14(1):128-139
Pharmacological perturbation studies based on protein-level signatures are fundamental for drug dis-covery.In the present study,we used a mass spectrometry(MS)-based proteomic platform to profile the whole proteome of the breast cancer MCF7 cell line under stress induced by 78 bioactive compounds.The integrated analysis of perturbed signal abundance revealed the connectivity between phenotypic behaviors and molecular features in cancer cells.Our data showed functional relevance in exploring the novel pharmacological activity of phenolic xanthohumol,as well as the noncanonical targets of clinically approved tamoxifen,lovastatin,and their derivatives.Furthermore,the rational design of synergistic inhibition using a combination of histone methyltransferase and topoisomerase was identified based on their complementary drug fingerprints.This study provides rich resources for the proteomic landscape of drug responses for precision therapeutic medicine.
7.Training of Radiology Residents in Singapore
Francis Cho Hao HO ; Cher Heng TAN ; Tze Chwan LIM ; Chow Wei TOO ; Hsien Min LOW ; Charles Xian Yang GOH
Korean Journal of Radiology 2024;25(12):1036-1038
8.Training of Radiology Residents in Singapore
Francis Cho Hao HO ; Cher Heng TAN ; Tze Chwan LIM ; Chow Wei TOO ; Hsien Min LOW ; Charles Xian Yang GOH
Korean Journal of Radiology 2024;25(12):1036-1038
9.Training of Radiology Residents in Singapore
Francis Cho Hao HO ; Cher Heng TAN ; Tze Chwan LIM ; Chow Wei TOO ; Hsien Min LOW ; Charles Xian Yang GOH
Korean Journal of Radiology 2024;25(12):1036-1038
10.Training of Radiology Residents in Singapore
Francis Cho Hao HO ; Cher Heng TAN ; Tze Chwan LIM ; Chow Wei TOO ; Hsien Min LOW ; Charles Xian Yang GOH
Korean Journal of Radiology 2024;25(12):1036-1038