Biomedical subjects

G Ting

Publications and source records attributed to G Ting.

5 recordsLinked to original sources

PubMed1992

Using technetium-99m (V) dimercaptosuccinic acid to detect malignancies from single solid masses in the lungs.

Fifty patients (43 male, 7 female, age 31-77 years) with single solid masses in their lungs based on the findings of a chest X-radiograph [40 malignancies: 5 small cell carcinoma (Ca), 17 epidermoid Ca, 12 adeno Ca, 6 undifferentiated large cell Ca] and 10 benign lesions underwent technetium-99m (V) dimercaptosuccinic acid [99m-(V)DMSA] scans to evaluate the usefulness of 99mTc-(V)DMSA in the detection of lung Ca with different cell types and benign lesions. Only 43% (17/40) of the malignancies in the lungs were detected by 99mTc-(V)DMSA, including 29% (5/17) epidermoid Ca, 50% (6/12) adeno Ca and 17% (1/6) undifferentiated large cell Ca of the lungs. However, all 5 cases of small cell Ca and 11 cases combined with bone metastasis were revealed by 99mTc-(V)DMSA. In addition, 3 of the 10 benign lesions (2 organizing pneumonias, 1 benign tumor) presented with an uptake of 99mTc-(V)DMSA. The diagnostic sensitivity, specificity and accuracy were 43%, 70% and 48%, respectively, in differentiating malignant from benign lesions for the single solid mass in the lungs. In conclusion, 99mTc-(V)DMSA is of little or no use in the differentiation of lung Ca from single solid masses in the lungs.

Adenocarcinoma↗

PubMed1992

Intravenous dipyridamole technetium-99m MMI myocardial perfusion scintigraphy for detection of coronary artery disease.

To evaluate the efficacy of stress technetium-99m MMI (N-2-methoxy-2-methyl propyl isonitrile) myocardial perfusion scintigraphy (Tc-99m MMI) using intravenous dipyridamole for detection of coronary artery disease (CAD), we collected 66 cases (53 men, 13 women, aged 40-79 years old) between Sept. 1990 and Oct. 1991. The cases were divided into two groups: group I involving 44 patients received coronary arteriography (CAG) examination without previous percutaneous transluminal coronary angioplasty (PTCA) or coronary artery bypass graft (CABG); group II embracing 22 patients received no CAG examination but all were suffering from old myocardial infarction (MI) evidenced by history and electrocardiography (ECG). All cases underwent Tc-99m MMI planar and single photon emission computed tomography (SPECT) both on intravenous dipyridamole stress and separate day rest tests. Of the 44 group I patients receiving both Tc-99m MMI and CAG, 35 (79.5%) were positive and 7 (16%) were negative by both tests and another 2 (4.5%) were positive by CAG only. Of those positive by both tests, 21 (60%) suffered from identical coronary arterial involvement, including 13 one-vessel disease, 5 double-vessel disease and 3 triple-vessel disease. Of group II patients, 14 suffered from old inferior wall (IW) MI, 6 from old anterior or anteroseptal wall (AW) MI, 1 from old lateral wall (LW) MI and another 1 from combined old anterior and lateral wall (ALW) MI by ECG. Of the 14 patients with IWMI by ECG, all suffered from right coronary artery (RCA) disease but 7 (50%) of them from multivessel disease (MVD) by Tc-99m MMI. 5 of the 6 patients with AWMI by ECG suffered from left anterior descending coronary artery (LAD) disease, but 3 of them from MVD by Tc-99m MMI. Both patients with LWMI and ALWMI by ECG suffered from triple-vessel disease by Tc-99m MMI. The sensitivity of Tc-99m MMI in detecting CAD in group I was 95%, the specificity was 100%. The sensitivity for detection of individual coronary artery disease in LAD, left circumflex coronary artery (LCX) and RCA was 96%, 45% and 89% in this order and the respective specificity was 94%, 100% and 88%. In group II the sensitivity was 95%. The overall sensitivity of intravenous dipyridamole Tc-99m MMI for detection of CAD in groups I and II was 95%; specificity was 100% and accuracy was 95%. In conclusion, stress Tc-99m MMI using intravenous dipyridamole is a valuable method for evaluation and detection of CAD.

Adult↗

PubMed1979

The onset of rhythmic activities in normal and high-risk infants.

The onset of rhythmic activities was compared for 2 groups of high-risk infants (a preterm Respiratory Distress Syndrome and a postterm postmature group) and a normal term group over their 1st year of life. The postterm postmature group experienced earlier onsets of rhythmic activities. The preterm RDS group showed delays in the onset of rhythmic activities, but when a correction was made for the prematurity, did not differ from the other groups. These differences suggest that the onset dates for rhythmic activities are not affected by the perinatal complications of RDS or postmaturity, but are related to gestational age differences. A comparison of the 3 groups on Bayley 1st-year motor skills revealed group differences even after an adjustment for gestational age differences, suggesting that the development of motor skills, unlike the development of rhythmic activities, may have been affected by these perinatal complications.

Adult↗

PubMed1978

A first-year follow-up of high-risk infants: formulating a cumulative risk index.

Multiple developmental assessments were made at 4-month intervals over the first year of life for 2 groups of infants born at risk and 1 normal group. The groups included 46 preterm respiratory distress syndrome infants, 46 postterm postmaturity syndrome, and 59 term normal infants. The mothers were white, multiparous, middle-class, high school graduates averaging 25 years of age. Analyses of group differences revealed that the preterm respiratory distress syndrome (RDS) infants continued to exhibit delays in motor and mental development and the postmature infants in mental development. Discriminant function analyses suggesting that the most efficient predictors and accurate discriminators of continuing risk were as follows: the Parmelee obstetric and postnatal complications scores and the Brazelton interactive and motoric process scores at birth; the Denver rating, mother-infant interaction and Carey temperament ratings at 4 months; and the Bayley mental and motor scores at 8 months. On the basis of their weighted assessment scores, infants were assigned a cumulative risk index at each assessment period.

Age Factors↗

PubMedDate not supplied

Levitsky ankle stabilization procedure.

The article discusses surgical reconstruction of torn or partially torn and refibrosed lateral ankle collateral ligaments. The anatomy and historical literature are reviewed. The authors present the Levitsky ankle stabilization procedure.

Adult↗