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Biomedical subjects

K K Ng

Publications and source records attributed to K K Ng.

18 recordsLinked to original sources
PubMed1992

CT findings of pediatric thoracic actinomycosis: report of four cases.

Thoracic actinomycosis is an uncommon disease, which may mimic malignancy, lymphoma or tuberculosis of the chest. In the past three years, four cases of thoracic actinomycosis have been found in children at our hospital. Their computed tomography (CT) findings included pulmonary infiltrates, a chest wall mass, pleural and pericardial effusion, mediastinum involvement and rib changes. Although the final diagnosis of Actinomyces infection depends on a bacterial culture and pathology, CT can play an important role in establishing the diagnosis and evaluating the extent of the disease.

Actinomycosis↗
PubMed1989

Hepatic actinomycosis with portal vein occlusion.

Hepatic actinomycosis with abdominal wall invasion was found by computed tomography (CT) in a 44-year-old woman. Occlusion of the main and right portal veins by the actinomycoma causing cavernous transformation was proven by angiography. Duodenobiliary reflux and communication between the biliary tree and the abscess were demonstrated by upper gastrointestinal radiography, percutaneous transhepatic cholangiogram, and CT. The imaging studies reflected the pathologic process of this disease. The unique feature of this case is that infection ascended through the duodenobiliary reflux; this should be considered one of the routes for the transmission of hepatic actinomycosis.

Actinomycosis↗
PubMed1989

Effect of acupuncture on immunoglobulins of serum, saliva and gingival sulcus fluid.

The present research is a preliminary investigation of the changes of immunoglobulins in serum, saliva and gingival sulcus fluid in response to acute and chronic acupuncture stimulation in 70 volunteers. The acute effect of acupuncture showed that 30 minutes and 24 hours after acupuncture treatment saliva IgA levels were significantly increased in those who had previous low levels of IgA, but decreased in those who had previous high levels. When acupuncture was given daily for 2 weeks, the saliva IgA level was significantly increased, about 20% higher than that of the initial value. The IgG levels in serum and gingival sulcus fluid were decreased at 30 minutes after acupuncture treatment. On the other hand, chronic acupuncture stimulation (daily for 7-10 days) significantly increased IgG levels in both serum and gingival sulcus fluid. The regulatory effect of acupuncture on the immunological function of body defense system is discussed.

Acupuncture Therapy↗
PubMed1978

Clinical and electroencephalographic data indicative of brain tumours in a seizure population.

One hundred and two patients suffering from seizures, with focal EEG signs (101 cases) and focal seizures but generalized EEG abnormalities (one case) were divided into tumour (twenty-one cases) and non-tumour (eighty-one cases) groups on the basis of contrast radiological studies. Retrospective analysis of various clinical data and EEG abnormalities, determined before the contrast radiological examinations, showed that the following were statistically significantly different between the two groups in favour of a tumoral aetiology for the seizures: age at onset of fits (greater than 20 years), presence of focal neurological signs and increased intracranial pressure, presence of focal unilateral delta waves without accompanying epileptic discharges, beta asymmetry between the cerebral hemispheres and hyperventilation-induced electrical seizures. A brain scan was a very useful screening test for the detection of a tumoral aetiology for seizures.

Age Factors↗
PubMed1977

Intraventricular chemotherapy in neonatal meningitis.

All of 16 infants with neonatal meningitis treated during a 30-month period were found to have accompanying ventriculitis at the time of the initial ventricular puncture. Fifteen of these infants were caused by gramm-negative organisms. All infants received antibiotics systemically and intraventricularly via an implanted ventriculostomy reservoir or by direct ventricular injection. Antibiotic concentrations within the ventricular fluid were monitored during chemotherapy; the complications encountered during treatment are discussed. Fifteen infants survived the infection; of these, seven infants were normal at follow-up examinations. In our experience intraventricular chemotherapy as an adjunct to systemic administration of antibiotics has greatly reduced the mortality rate in neonatal meningitis.

Ampicillin↗
PubMed1976

Interaction of angiotensin II with catecholamines in the circulation of the dog and cat.

1. The blood-bathed organ technique was employed to study the effects of angiotensin II and catecholamines on an isolated everted rat aorta bathed in the extracorporeal circulating blood of adult dogs and cats. 2. When the injections were made into the bathing blood close to the everted rat aorta, angiotensin II was half as potent as adrenaline or noradrenaline on a molar basis. 3. After intravenous injections, the vasoconstrictor potency of angiotensin was twenty times that of adrenaline or noradrenaline on the everted rat aorta. The increase in potency was due to the interaction of angiotensin II with catecholamines on the preparation. 4. Intravenous phenoxybenzamine abolished the potentiated vasoconstrictor effect of angiotensin II on the blood-bathed everted rat aorta, but it did not abolish the pressor effect of angiotensin II on the cardiovascular system of the animals. The results suggest that catecholamines released into the circulating blood by intravenous angiotensin II do not play an important role in the pressor effect of angiotensin II.

Angiotensin II↗
PubMed1975

Amniography in the early diagnosis of hydatidiform mole.

In 16 patients with suspected hydatidiform mole the diagnosis was readily confirmed by amniography. A characteristic honeycomb pattern was seen in all cases. Opacification of the pelvic and ovarian veins was observed in 11 patients, four of whom also showed an excretory urogram. No complications occurred. We conclude that amniography is a simple, safe and reliable method of establishing the diagnosis in clinically suspected cases of hydatidiform mole. Amniography should be considered: (1) as a primary procedure where facilities for ultrasonic investigations and for chorionic gonadotrophin (HCG) determinations are not available, or (2) when ultrasonic examination and the HCG levels are equivocal.

Amnion↗