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Sun W, Chee C, Kok L, Lim F, Samsudin S. Differentiating attack-defense performance for starting and bench players during the Tokyo Olympics men's basketball competition. PLoS One 2023; 18:e0296012. [PMID: 38100483 PMCID: PMC10723665 DOI: 10.1371/journal.pone.0296012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Accepted: 12/04/2023] [Indexed: 12/17/2023] Open
Abstract
This study aimed to explore the differences in attack-defense performance between the top and bottom teams for starting and bench players during the Tokyo Olympics men's basketball competition, to determine the relationship between the attack-defense performance of starting and bench players and the final competition rankings, as well as with each performance indicator. The rank-sum ratio (RSR) comprehensive evaluation was employed to describe the attack-defense performance of starting and bench players. Additionally, an independent sample t-test, Spearman Rho Correlation, and Pearson Correlation were conducted to test the differences and relationships between the various variables at a 0.05 level of significance, respectively. The results indicated that the top four teams showed significant differences in the attack-defense performance of their starting players compared to the bottom four teams (p = 0.021), mainly in terms of 3-point shooting percentage (p = 0.042) and free throw shooting percentage (p = 0.044). Besides that, the attack-defense ranks of both starting players (p = 0.004, r = 0.757) and bench players (p = 0.020, r = 0.658) had a significant correlation with the final rankings. Points per game, 2-point field goal percentage, and assists had a statistically significant (p<0.01) and strong positive correlation (0.70
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Affiliation(s)
- Wenping Sun
- Department of Sport Studies, Faculty of Educational Studies, Universiti Putra Malaysia, Kuala Lumpur, Malaysia
| | - ChenSoon Chee
- Department of Sport Studies, Faculty of Educational Studies, Universiti Putra Malaysia, Kuala Lumpur, Malaysia
| | - LianYee Kok
- Department of Sport Science, Faculty of Applied Sciences, Tunku Abdul Rahman University of Management and Technology, Kuala Lumpur, Malaysia
| | - FongPeng Lim
- Department of Mathematics and Statistics, Faculty of Science, Universiti Putra Malaysia, Kuala Lumpur, Malaysia
| | - Shamsulariffin Samsudin
- Department of Sport Studies, Faculty of Educational Studies, Universiti Putra Malaysia, Kuala Lumpur, Malaysia
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Sun W, Chee C, Kok L, Lim F, Samsudin S. Evaluation of differences in the performance strategies of top and bottom basketball teams utilizing rank-sum ratio comprehensive. Front Sports Act Living 2022; 4:1052909. [PMID: 36506722 PMCID: PMC9732543 DOI: 10.3389/fspor.2022.1052909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Accepted: 11/07/2022] [Indexed: 11/27/2022] Open
Abstract
Introduction This study aimed to explore common characteristics among top basketball teams, differentiate attacking and defensive performance between top and bottom teams, and correlate attacking and defensive performance with final competition rankings during the 2019 Men's Basketball World Cup, as well as to determine the relationship between performance indicators and the attacking and defensive performance. In addition, the study aimed to determine the attacking and defensive level of the top and bottom eight teams and find their existing problems and shortcomings, to further improve their competitive basketball strength, and also provided valid and reliable information for coaches to conduct targeted training in the future. Methods The rank-sum ratio (RSR) was employed to evaluate the attack, defense, and overall attacking and defensive performance between the top and bottom teams during the 2019 Men's Basketball World Cup. Additionally, an independent sample T-test was conducted to test the difference in performance indicators of attack and defense between the top eight and bottom eight teams. Spearman Rho Correlation was conducted to determine the relationship between the attacking and defensive RSR value and the final competition ranking at the 0.05 confidence level. Pearson Correlation was employed to test the relationship between the performance indicators and the attacking and defensive RSR value at the 0.05 confidence level. According to Spearman and Pearson Correlation, the indicators which contributed most to the attacking and defensive performance, as well as the correlation between attack and defense and the final ranking, can thus be determined. Results The results showed that the attacking performance of the top eight teams was far better than the bottom eight teams in terms of average points (p = 0.000), 2-point shoot percentage (p = 0.001), 3-point shoot percentage (p = 0.003), free throw percentage (p = 0.001), turnovers (p = 0.012), and assists (p = 0.000), and there was a significant difference (p < 0.05). However, second attack (p = 0.484), fast-break (p = 0.174), and offensive rebounds (p = 0.261) showed no significant difference between the two cohorts (P > 0.05), and the offensive rebounds of the bottom eight teams were better than the top eight teams. Additionally, there was a large gap between the top eight teams and the bottom eight teams in lost points (p = 0.001) and defensive rebounds (p = 0.000), with a very significant difference (p < 0.01). However, steals (p = 0.760), blocks (p = 0.166), and fouls (p = 0.686) had no significant difference between the two cohorts (P > 0.05). Additionally, there was a very significant difference between attack RSR (p = 0.000), defense RSR (p = 0.006), and the overall attack-defense RSR (p = 0.000) of the top eight and bottom eight teams (p < 0.01), and most top teams focused on developing both attack and defense and paid attention to improve the overall attacking and defensive ability. Moreover, there was a significant relationship between the overall attack-defense performance and assists (p = 0.832), rebounds (p = 0.762), turnovers (p = 0.702), 2-point shoot percentage (p = 0.704), defensive rebounds (p = 0.809), fast-break points (p = 0.577), blocks (p = 0.600), and free throw percentage (p = 0.575). Conclusions This study showed that the top basketball teams focused on developing both attack and defense, and have the common characteristics of strong attack and defense. Whether it was the attack, defense, or overall attacking and defensive ability, there was a significant relationship with the final ranking. Additionally, this study showed that there were very significant differences in both attacking and defensive abilities between the top eight and bottom eight teams, as well as highlighted their respective advantages and disadvantages in attacking and defensive indicators. Besides that, this study found that performance indicators such as assists, defensive rebounds, 2P%, turnovers, FT%, fast-breaks, and blocks were the main factors that distinguish the top and bottom teams, and they had a significant relationship with overall attacking and defensive performance. The above information allows coaches and players to learn the latest developments in competitive basketball, as well as their advantages and disadvantages, to help them organize targeted training in the future.
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Affiliation(s)
- Wenping Sun
- Department of Sport Studies, Faculty of Educational Studies, Universiti Putra Malaysia, Kuala Lumpur, Malaysia,Department of Sports, Nanyang Institute of Technology, Nanyang, China,*Correspondence: Wenping Sun
| | - ChenSoon Chee
- Department of Sport Studies, Faculty of Educational Studies, Universiti Putra Malaysia, Kuala Lumpur, Malaysia
| | - LianYee Kok
- Department of Sport Science, Faculty of Applied Sciences, Tunku Abdul Rahman University of Management and Technology, Kuala Lumpur, Malaysia
| | - FongPeng Lim
- Department of Mathematics and Statistics, Faculty of Science, Universiti Putra Malaysia, Kuala Lumpur, Malaysia
| | - Shamsulariffin Samsudin
- Department of Sport Studies, Faculty of Educational Studies, Universiti Putra Malaysia, Kuala Lumpur, Malaysia
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Sivakumar S, Macarulla T, Grell P, Chee C, Krishnamurthy A, Ka Wong M, Michael M, Milella M, Prager G, Springfeld C, Collignon J, Siveke J, Santoro A, Lin C, Peltola K, Bostel G, Jankovic D, Altzerinakou M, Fabre C, Bai L. P-5 Phase II study (daNIS-1) of the anti-TGF-β monoclonal antibody (mAb) NIS793 +/- spartalizumab in combination with nab-paclitaxel/gemcitabine (NG) versus NG alone in patients with first-line metastatic pancreatic ductal adenocarcinoma (mPDAC). Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Keleher V, Nyunt S, Broekman B, Chee C. P-993 - Prevalence and risk factors for antenatal depression in pregnant women attending national university hospital, singapore. Eur Psychiatry 2012. [DOI: 10.1016/s0924-9338(12)75160-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Broekman B, Chan Y, Chee C, Keleher V, Chen H, Haley C, Sung S, Kwek K, Chong Y, Meaney M, Saw S. P-1457 - Association between mental health problems during the second trimester of pregnancy and birth length of the newborn. Eur Psychiatry 2012. [DOI: 10.1016/s0924-9338(12)75624-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Koh A, Lim TH, Au Eong KG, Chee C, Ong SG, Tan N, Yeo I, Wong D. Optimising the management of choroidal neovascularisation in Asian patients: consensus on treatment recommendations for anti-VEGF therapy. Singapore Med J 2011; 52:232-240. [PMID: 21552782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In Asian countries, age-related macular degeneration (AMD), specifically wet AMD or choroidal neovascularisation (CNV), is an important cause of blindness and visual handicap. Vascular endothelial growth factors (VEGF) play an integral role in the development of CNV and thus provide an important therapeutic target. Current treatment paradigms for neovascular AMD recognise the place of photodynamic therapy (PDT) in the management of this condition. However, combination therapy targeting different pathways to produce a synergistic effect may result in improved visual outcomes and reduced duration of treatment. Anti-VEGF therapy has greatly improved treatment outcomes in patients with CNV, and a growing body of evidence supports the role of these agents as monotherapy or in combination with PDT. In particular, anti-VEGF may be a first-line treatment option in certain types of subfoveal myopic CNV as well as for classic and occult juxtafoveal and subfoveal CNV. The implementation of evidence-based medicine into current clinical practice is paramount to improving patient care. The authors, who are also members of the Singapore Medical Retina Advisory Board, outline the consensus points and recommended treatment algorithms based on currently available knowledge to provide a structured management approach to the treatment of Asian patients with CNV.
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Affiliation(s)
- A Koh
- Eye and Retina Surgeons, Camden Medical Centre, 1 Orchard Boulevard, Singapore 248649.
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Acharya UR, Lim CM, Ng EYK, Chee C, Tamura T. Computer-based detection of diabetes retinopathy stages using digital fundus images. Proc Inst Mech Eng H 2009; 223:545-53. [PMID: 19623908 DOI: 10.1243/09544119jeim486] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Diabetes mellitus is a heterogeneous clinical syndrome characterized by hyperglycaemia and the long-term complications are retinopathy, neuropathy, nephropathy, and cardiomyopathy. It is a leading cause of blindness. Diabetic retinopathy is the progressive pathological alterations in the retinal microvasculature, leading to areas of retinal nonperfusion, increased vascular permeability, and the pathological proliferation of retinal vessels. Hence, it is beneficial to have regular cost-effective eye screening for diabetes subjects. Nowadays, different stages of diabetes retinopathy are detected by retinal examination using indirect biomicroscopy by senior ophthalmologists. In this work, morphological image processing and support vector machine (SVM) techniques were used for the automatic diagnosis of eye health. In this study, 331 fundus images were analysed. Five groups were identified: normal retina, mild non-proliferative diabetic retinopathy, moderate non-proliferative diabetic retinopathy, severe non-proliferative diabetic retinopathy, and proliferative diabetic retinopathy. Four salient features blood vessels, microaneurysms, exudates, and haemorrhages were extracted from the raw images using image-processing techniques and fed to the SVM for classification. A sensitivity of more than 82 per cent and specificity of 86 per cent was demonstrated for the system developed.
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Affiliation(s)
- U R Acharya
- Department of Electronics and Computer Engineering, Ngee Ann Polytechnic, Singapore.
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Cheng CL, Saw SM, Pang CE, Chee C. Age-related macular degeneration in Singapore. Singapore Med J 2009; 50:126-131. [PMID: 19296026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
INTRODUCTION This study aimed to describe the morphology of age-related macular degeneration (AMD) as well as to obtain an estimate of the population-based incidence rate in Singapore. METHODS This is a retrospective hospital-based study of AMD cases seen in 1991 and 1992 at the Singapore National Eye Centre (SNEC), a tertiary eye centre. All case notes recorded with the International Classification of Diseases, ninth revision, clinical modification code '362.5', which is 'degenerations of the macula', were retrieved and analysed. Only case notes of patients who were aged 50 years and above and with documented AMD were included in the study. RESULTS There were 41 (21.8 percent) patients with drusen alone, 39 (20.7 percent) with dry AMD and 108 (57.5 percent) with exudative AMD. The morphology of the disease was similar among the Chinese and non-Chinese and there were no gender differences. A significant majority of patients with dry and exudative AMD had legal blindness at presentation (p-value is less than 0.0001). Notably, 27 (33.3 percent) patients with exudative AMD had improved vision with time. In comparison, the majority of patients with dry AMD or drusen alone tended to have the same or worsening visual acuity over time. The two-year SNEC hospital incidence rate of AMD in 1991-1992 was 0.38 percent or equivalent to 3.8 per 1,000 new cases seen at SNEC. The estimated population-based incidence rate of exudative AMD was 0.02 percent. CONCLUSION The population incidence of exudative AMD is lower but comparable to the Western population. Patients with exudative AMD tend to have poorer vision as compared to patients with geographical atrophy or drusen. The proportion of exudative AMD to geographical atrophy appears to be higher than in the West.
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Affiliation(s)
- C L Cheng
- Singapore National Eye Centre, Singapore Eye Research Institute, 11 Third Hospital Avenue, Singapore.
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Low B, Liong M, Yuen K, Chee C, Leong W, Chong W, Khan N, Cheah P. MP-07.18 (podium): Reliability, validity and responsiveness of international prostate symptom score in females with lower urinary tract symptoms. Urology 2007. [DOI: 10.1016/j.urology.2007.06.302] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Low B, Liong M, Yuen K, Chee C, Chong W, Leong W, Karim N, Cheah P. PD-03.05. Urology 2006. [DOI: 10.1016/j.urology.2006.08.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Abstract
OBJECTIVE We present our experience with laparoscopic adrenalectomy for benign adrenal diseases and compare clinical outcomes with the conventional open approach. METHODS Between 1990 and 2001, two consecutive series of patients who underwent adrenalectomy for small, benign adrenal diseases were reviewed retrospectively. Patients with large tumours(> 7 cm), cancer and phaeochromocytoma were excluded. Fifty-eight patients underwent laparoscopic adrenalectomy and 48 patients had open surgery for benign adrenal diseases. Perioperative and postoperative records of both approaches were reviewed. RESULTS The two groups were comparable in terms of patient age, sex, weight and side of lesion.The common indications for surgery were Conn's syndrome and Cushing's syndrome. The sizes of tumour were comparable between the laparoscopic and open groups (mean, 2.1 cm vs 2.4 cm). Despite the longer operating time (mean, 128 minutes vs 87 minutes), the postoperative morbidity, parenteral analgesic requirement and length of postoperative hospital stay (3.2 days vs 7.2 days) were less inpatients undergoing laparoscopic adrenalectomy. Patients also enjoyed earlier return to oral intake and ambulation. There were fewer complications in the laparoscopic group. There was no conversion to open surgery. CONCLUSION Laparoscopic adrenalectomy is safe and has become the treatment of choice for small, benign adrenal lesions at our institution.
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Affiliation(s)
- Y H Tan
- Department of Urology, Singapore General Hospital, Singapore.
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12
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Ng KH, Chung YFA, Cwilde C, Chee C. An unusual presentation of acute scrotum after appendicitis. Singapore Med J 2002; 43:365-6. [PMID: 12437045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Abstract
Acute scrotum following perforated appendicitis is a rare complication. This usually occurs in the presence of a patent processus vaginalis in children. We report a case of acute scrotum presenting after appendectomy for perforated appendicitis in a young adult.
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13
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Yip SK, Chee C. Clinics in diagnostic imaging (46). Renal cell carcinoma in acquired cystic kidney disease. Singapore Med J 2000; 41:89-91. [PMID: 11063212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Acquired cystic disease of the kidney and renal cell carcinoma are associated with chronic renal failure. In recent years, there has been increased incidental detection of renal tumours through the liberal use of ultrasonography (US) and computed tomography (CT). A 40-year-old man suffering from chronic renal failure and who was being treated with haemodialysis for six years, was found to have a complex cystic lesion on US and CT. Nephrectomy was performed and the lesion was confirmed to be renal cell carcinoma associated with acquired cystic kidney disease. The current role of imaging in the management of affected patients are discussed.
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Affiliation(s)
- S K Yip
- Department of Urology, Singapore General Hospital, Singapore
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Kua EH, Chee C. Shoplifting--badness, madness or sadness. Singapore Med J 1999; 40:443-4. [PMID: 10560267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
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15
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Yam JP, Thai AC, Chua S, Chee C, Arulkumaran S. A case of accelerated development of proliferative diabetic retinopathy in a woman with type 2 diabetes mellitus after pregnancy. Ann Acad Med Singap 1998; 27:265-8. [PMID: 9663323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Whilst it is recognised that diabetic retinopathy is a consequence of prolonged elevation of blood glucose levels, recent studies suggest rapid normalisation of blood sugar as a causal factor in accelerating its development. In this case report, a non-insulin dependent diabetic with poor blood glucose control but no retinopathy in early pregnancy had normalisation of glucose control by the third trimester. However, glucose control deteriorated rapidly postnatally, and she had a sudden blurring of vision three months after delivery of her baby, at which time severe proliferative diabetic retinopathy was diagnosed. The reason for the unusually rapid development of proliferative retinopathy was uncertain, but appeared to have a temporal association with the deterioration of her glycaemic control postnatal after a period of strict diabetes control in the perinatal period.
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Affiliation(s)
- J P Yam
- Department of Obstetrics & Gynaecology, National University Hospital, Singapore
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Abstract
OBJECTIVES To study the patient outcomes of various approaches on 14 consecutive patients who had laparoscopic adrenalectomy surgery between October 1995 and March 1997. METHODS The patients comprised 5 men and 9 women (mean age 46.2 years, range 32 to 61) with varying diagnoses. Eleven patients had Conn's syndrome, 1 had Cushing's syndrome, 1 had a nonfunctioning adrenal adenoma, and 1 had an adrenal myelolipoma. The adenomas were confirmed by hormonal assays, biochemical tests, and computed tomography (CT) imaging. Seven adenomas were sited on the right and seven were sited on the left. We used two alternative approaches: a transabdominal approach (8 patients) and a retroperitoneal approach (6 patients). RESULTS None of the procedures required conversion to open surgery, nor was there any procedure-related complication. Blood loss was minimal. All the lesions were benign on final histology. The mean operating time was 135 minutes (range 80 to 190). The postoperative period was without significant complications, with patients reporting minimal pain. Patients were able to achieve an early return to oral intake and preoperative activity. The postoperative hospital period ranged from 1 to 10 days. CONCLUSIONS We believe laparoscopic adrenalectomy to be a viable option in the removal of benign adrenal lesions. It is a safe technique when performed by experienced practitioners and results in faster recovery. The key advantage to this technique is its minimally invasive approach and decreased hospital costs.
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Affiliation(s)
- C Chee
- Department of Urology, Singapore General Hospital, Singapore
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Tan C, Chew PT, Lum WL, Chee C. Trabeculectomy--success rates in a Singapore hospital. Singapore Med J 1996; 37:505-7. [PMID: 9046204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Previously published papers on the success of trabeculectomy as a treatment for glaucoma show success rates between 67% and 84%. The success rate of trabeculectomy in Afro-Carribean patients was observed to be lower than in Caucasian patients. It has been commonly believed that the success rate of trabeculectomy in Oriental/Asian eyes would lie somewhere between these. We reviewed the records of 51 consecutive trabeculectomies performed in the National University Hospital, Singapore and found that our success rate was lower-43.1% overall and 48.7% for primary glaucomas.
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Affiliation(s)
- C Tan
- Department of Ophthalmology, National University Hospital, Singapore
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Kahan BD, Chou T, Tejpal N, Wang M, Chee C, Stepkowski S. Synergistic effects of cyclosporin analogs--A, D, G, IMM-125--with rapamycin and/or brequinar. Transplant Proc 1994; 26:3021-4. [PMID: 7940951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- B D Kahan
- Department of Surgery, University of Texas Medical School, Houston 77030
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Gaston B, Reilly J, Drazen JM, Fackler J, Ramdev P, Arnelle D, Mullins ME, Sugarbaker DJ, Chee C, Singel DJ, Loscalzo J, Stamler J. Endogenous nitrogen oxides and bronchodilator S-nitrosothiols in human airways. Proc Natl Acad Sci U S A 1993; 90:10957-61. [PMID: 8248198 PMCID: PMC47900 DOI: 10.1073/pnas.90.23.10957] [Citation(s) in RCA: 493] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Recent discoveries suggesting essential bioactivities of nitric oxide (NO.) in the lung are difficult to reconcile with the established pulmonary cytotoxicity of this common air pollutant. These conflicting observations suggest that metabolic intermediaries may exist in the lung to modulate the bioactivity and toxicity of NO.. We report that S-nitrosothiols (RS-NO), predominantly the adduct with glutathione, are present at nano- to micromolar concentrations in the airways of normal subjects and that their levels vary in different human pathophysiologic states. These endogenous RS-NO are long-lived, potent relaxants of human airways under physiological O2 concentrations. Moreover, RS-NO form in high concentrations upon administration of NO. gas. Nitrite (10-20 microM) is found in airway lining fluid in concentrations linearly proportional to leukocyte counts, suggestive of local NO. metabolism. NO. itself was not detected either free in solution or in complexes with transition metals. These observations may provide insight into the means by which NO. is packaged in biological systems to preserve its bioactivity and limit its potential O2-dependent toxicity and suggest an important role for NO. in regulation of airway luminal homeostasis.
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Affiliation(s)
- B Gaston
- Division of Respiratory Disease, Children's Hospital, Boston, MA 02115
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Amrith S, Pham T, Chee C, Chan TK. Visual recovery following transethmoidal optic nerve decompression in traumatic optic neuropathy. Ophthalmic Surg 1993; 24:49-52. [PMID: 8446335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- S Amrith
- Department of Ophthalmology, National University Hospital, Singapore
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Holland SP, Chee C, Grimes M. The challenge of eye disease: the patient's perspective. J Ophthalmic Nurs Technol 1991; 10:52-4. [PMID: 2020023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
An educational symposium was organized to allow patients to be instructors by encouraging them to discuss their conditions, how they perceived their eye problems and the care they received, and the effect of their experience on their lives. Patients repeatedly stressed the need they felt for more time to discuss their disorders and more communication at all levels. An increasing use of patient information material, using printed materials and video, may partially alleviate the problem of a lack of communication.
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Chee C, Heng LK, Chew P, Ang BC, Lim AS. Idiopathic subretinal neovascularization. Ann Acad Med Singap 1989; 18:226-31. [PMID: 2473692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Idiopathic subretinal neovascularization is a potentially blinding condition and often strikes patients in their prime of life. It appears to be seen in more females, at an earlier age than males. Treatment is possible by photoablation of the subretinal new vessel by Argon or Yag laser. There is a clinical impression that Argon laser is more effective than the Yag laser for this purpose.
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Affiliation(s)
- C Chee
- Department of Ophthalmology, National University Hospital, Singapore
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Lim AS, Ang BC, Heng LK, Hart PM, Ngui MS, Chew P, Chee C, Kennedy JE. Implantation and diabetes: analysis of 525 cases. Ann Acad Med Singap 1989; 18:174-7. [PMID: 2751233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This is a retrospective study of 525 posterior chamber implants in diabetics performed by A S M Lim and B C Ang of Singapore. The patients were reviewed by visiting ophthalmologists--J E Kennedy (Sydney), M Ngui (East Malaysia) and P M Hart (Belfast). This study did not show any significant difference in the complication of post-operative visual acuity between diabetics and non-diabetics. 95% obtained 6/12 vision or better when pre-existing disease was excluded. It also showed that posterior chamber implants can be inserted in eyes with maculopathy or proliferative retinopathy if laser treatment was effectively done before or after surgery.
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Affiliation(s)
- A S Lim
- Department of Ophthalmology, National University Hospital, Singapore
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Younkin DP, Berman P, Sladky J, Chee C, Bank W, Chance B. 31P NMR studies in Duchenne muscular dystrophy: age-related metabolic changes. Neurology 1987; 37:165-9. [PMID: 3796830 DOI: 10.1212/wnl.37.1.165] [Citation(s) in RCA: 108] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
To evaluate possible progressive metabolic changes in Duchenne muscular dystrophy, we used 31P nuclear magnetic resonance spectroscopy to measure high-energy phosphate compounds and phosphorylated diesters (PDE) in resting gastrocnemius muscle of 14 Duchenne patients and 10 normal boys. The patients had higher inorganic phosphate (Pi), intracellular pH, and PDE; and lower phosphocreatine (PCr) and PCr/Pi ratio; ATP was not significantly different. The patients showed significant age-related decreases in PCr and PCr/Pi, and increases in Pi and PDE, but ATP did not change. In normal boys, ATP increased with age, but PCr and Pi did not. These studies imply progressive metabolic deterioration in Duchenne dystrophy.
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Crosley CJ, Chee C, Berman PH. Rickets associated with long-term anticonvulsant therapy in a pediatric outpatient population. Pediatrics 1975; 56:52-7. [PMID: 808788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Over a 12-month period, an ambulatory pediatric population receiving long-term anticonvulsants was surveyed for the presence of biochemical and radiologic rickets. There were 74 treated children and 95 matched controls. Elevations of serum alkaline phosphatase activity occurred in 31 of the 74 (42%) treated children (23 of 47 children between 2 and 10 years and 8 of 21 children between 10 and 16 years). This frequency of abnormal values was significantly greater than that which occurred in our control population. Calcium and phosphorus abnormalities were minimal in both treated and control populations. Radiologic rickets occurred in 6 of the 74 (8%) of the treated children and in none of the control population. Neither the severity of the rickets nor the degree of hyperalkaline phosphatasemia were correlated with age of the patient, duration, and/or dose of anticonvulsant therapy.
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