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INTRODUCTION: This study reviewed the diagnostic accuracy of the prehospital electrocardiogram (PHECG) rule-based algorithm for ST-elevation myocardial infarction (STEMI) universally utilised in Hong Kong. METHODS: This prospective observational study was linked to a population-wide project. We analysed 2210 PHECGs performed on patients who presented to the emergency medical service (EMS) with chest pain from 1 October to 31 December 2021. The diagnostic accuracy of the adopted rulebased algorithm, the Hannover Electrocardiogram System, was evaluated using the adjudicated blinded rating by two investigators as the primary reference standard. Diagnostic accuracy was also evaluated using the attending emergency physician's diagnosis and the diagnosis on hospital discharge as secondary reference standards. RESULTS: The prevalence of STEMI was 5.1% (95% confidence interval [CI]=4.2%-6.1%). Using the adjudicated blinded rating by investigators as the reference standard, the rule-based PHECG algorithm had a sensitivity of 94.6% (95% CI=88.2%-97.8%), specificity of 87.9% (95% CI=86.4%-89.2%), positive predictive value of 29.4% (95% CI=24.8%-34.4%), and negative predictive value of 99.7% (95% CI=99.3%-99.9%) [all P<0.05]. CONCLUSION: The rule-based PHECG algorithm that is widely used in Hong Kong demonstrated high sensitivity and fair specificity for the diagnosis of STEMI.

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INTRODUCTION: Total ischaemic time should be shortened as much as possible in patients with ST-segment elevation myocardial infarction (STEMI). This study evaluated whether prehospital 12-lead electrocardiogram (ECG) could shorten system delay in STEMI management. METHODS: From November 2015 to November 2017, 15 ambulances equipped with X Series Monitor/ Defibrillator (Zoll Medical Corporation) were used in the catchment area of Queen Mary Hospital, Hong Kong. Prehospital ECG was performed for patients with chest pain; the data were tele-transmitted to attending emergency physicians at the Accident and Emergency Department (AED) for rapid assessment. Data from patients with STEMI who were transported by these 15 ambulances were compared with data from patients with STEMI who were transported by ambulances without prehospital ECG or who used self-arranged transport. RESULTS: Data were analysed from 197 patients with STEMI. The median patient delay for activation of the emergency response system was 90 minutes; 12% of patients experienced a delay of >12 hours. There was a significant difference in delay between patients transported by ambulance and those who used self-arranged transport (P<0.001). For system delay, the use of prehospital ECG shortened the median time from ambulance on scene to first ECG (P<0.001). When performed upon ambulance on scene, prehospital ECG was available 5 minutes earlier than if performed in ambulance compartment before departure. Use of prehospital ECG significantly shortened AED door-to-triage time, AED door-to-first AED ECG time, AED door-to-physician consultation time, and length of stay in the AED (P<0.001 for all comparisons). CONCLUSION: Prehospital ECG shortened ischaemic time prior to hospital admission.

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BACKGROUND: Few updated studies have investigated risk factors for readmission for chronic obstructive pulmonary disease (COPD) since the implementation of the latest treatment guidelines. OBJECTIVE: To evaluate a series of potential risk factors for readmission in patients with COPD and in a subgroup with very frequent readmissions after implementation of the Global Initiative for Chronic Obstructive Lung Disease guidelines. DESIGN: Two hundred and fifty patients admitted for acute exacerbation of COPD (AECOPD) were recruited over 1 year. The readmission frequency in the ensuing year following hospital discharge was recorded and analysed against potential risk factors collected during the index admission. RESULTS: In the ensuing year, 183 (73.2%) patients were readmitted at least once for AECOPD. Previous non-invasive ventilation for AECOPD (HR 1.56, 95%CI 1.08-2.26), COPD Assessment Test score (HR 1.03, 95%CI 1.00-1.05), 6-minute walk distance (HR 0.98 per 10 m increase, 95%CI 0.97-0.99) and number of admissions for AECOPD in the previous year (HR 1.11, 95%CI 1.06-1.16) were independently associated with time to first readmission. Subgroup analysis showed that anxiety (OR 3.97, 95%CI 1.49-10.57) was strongly associated with very frequent readmissions (⩾4 in 1 year). CONCLUSIONS: AECOPD is associated with high rates of readmission. Anxiety is a potential modifiable factor associated with very frequent readmissions.

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CONTEXT: A new group of novel psychoactive substance, the N-methoxybenzyl (NBOMe) derivatives of substituted phenethylamine, has recently emerged on the drug market, among which 25I-NBOMe and 25B-NBOMe have previously been implicated in clinical intoxications and fatalities. We report two cases of acute intoxication associated with these substances. CASE DETAILS: Two male patients (17 and 31 years of age) had ingested drugs labelled as 'NBOMe' or 'Holland film' and developed confusion, agitation, hypertension, tachycardia, hyperthermia, sweating and dilated pupils. Other features included convulsion, rhabdomyolysis and deranged liver function. The patients required benzodiazepines and other drugs for the control of symptoms. Urine samples from both patients were analysed using liquid-chromatography tandem mass spectrometry (LC-MS/MS) following glucuronidase digestion and solid-phase extraction. Identification was based upon comparison of the retention time and enhanced product ion scan with reference standards. In both urine samples, 25B-NBOMe was detected. Additionally, 25C-NBOMe was identified in one of the urine samples. DISCUSSION: The NBOMe compounds are highly potent 5HT2A receptor agonists and are also agonists at alpha-adrenergic receptors, which likely account for their serotonergic and sympathomimetic symptoms. The clinical testing of NBOMe drugs is not commonly available. Clinicians as well as laboratory staff play an important role in facilitating the detection of this group of potentially dangerous emerging drugs.

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Uterine incarceration is a rare event complicating pregnancy. Herein, we present a unique case of an asymptomatic term pregnancy with uterine incarceration; this patient had had an anterior myomectomy 3 years earlier. She had an asymptomatic antenatal course and incidental identification of uterine incarceration during cesarean section. We also address the importance of early recognition and appropriate management regarding this circumstance.

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From 1982 to 1991, six twin pregnancies, in which one of the fetuses died in utero, have been encountered. The causes of antepartum death in twin gestation could be identified in four cases; one with abruptio placenta, one with twin-to-twin transfusion syndrome, one with twisting of cord and one with velamentous insertion of cord. All six surviving infants had no abnormality in the follow-up of two to seven years. Although a conclusion about the prognosis could not be drawn from such a small series, these good results may have resulted from 1) 2 cases having been dichorionic twins, and 2) the other 4 monochorionic twins of 31-36 gestation weeks were delivered 1 to 5 days after the diagnosis. Conservative treatment was usually suggested until the fetal lung was mature enough for induction of labor. One case was treated after the death of its counterpart with tocolytic agent for a further 15 days because of prematurity. Cesarean section was performed finally for fetal distress resulting from chronic abruption placenta. The other five cases were delivered through vaginal route. According to experience as well as literature review, to improve the prognosis, obstetricians should be familiar with the management of one fetal death in twin pregnancy, especially in those with monchorionic twins.

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Transcervical resection of the endometrium and submucous myomas using an unmodified urologic resectoscope has recently been developed as a treatment for menorrhagia and/or infertility when conservative management proves unsatisfactory but the patient desires to preserve the fertility or wishes to avoid hysterectomy. Through June 1990, 7 patients were treated with this procedure including one for endometrial ablation and six for transcervical myomectomy alone. No significant complication was seen and the results were relatively satisfactory in an average 7 1/2 months follow up. This approach seems a safe, effective surgical procedure and represents an attractive alternative to hysterectomy or abdominal myomectomy.

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Sclerosing hemangioma is a rare but well-recognized benign lesion of the lung. We report a case of pulmonary sclerosing hemangioma correctly diagnosed by fine needle aspiration (FNA) cytology. The sharp and smooth contour of the discrete mass in the left lower zone of the chest roentgenogram raised the possibility of a benign lesion, including pulmonary sclerosing hemangioma. The characteristic "blood spaces" with surrounding regular, bland polygonal tumor cells in the FNA smears provided an essential clue to the diagnosis of sclerosing hemangioma. It was confirmed by Surecut biopsy of the lesion. The patient remained well one year after the investigation and was spared an unnecessary diagnostic thoracotomy. The cytologic features and differential diagnoses of pulmonary sclerosing hemangioma are discussed. Besides delineating the cytologic characteristics of pulmonary sclerosing hemangioma, this case illustrates the importance of a careful clinicopathologic correlation, which should be exercised by the cytopathologist in all instances.

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Uterine lipoleiomyoma is uncommon and has received little attention from gynecologists. We report a case of uterine lipoleiomyoma with subsequent pelvic abscess after rupture of the appendix. Its clinical picture mimicked uterine malignancy. The patient was a 60-year-old woman, who presented with a 2-week period of lower abdominal pain which was exacerbated 10 days later. After admission, gynecologic examination revealed a large pelvic mass of firm consistency. On a plain film of the abdomen, there was a large calcified mass in the pelvis. Pelvic ultrasound demonstrated a 15 yen 12 yen 12 cm mass with strong echogenicity in the margin, but the central component of the mass was attenuating and revealed a poorly defined echogenic mass. A computed tomography scan of the pelvis demonstrated a well-encapsulated mass that was predominantly the density of fat (-65 Hounsfield unit) in the central part, with calcification present in the peripheral layer of the mass. There was also a cystic lesion measuring 3 yen 2.5 yen 1.5 cm in the right adnexal area. A preoperative diagnosis of uterine lipoleiomyoma with necrosis, liposarcoma of the uterus or teratocarcinoma of the ovary was made by the CT scan. A diagnostic dilatation and curettage (D&C) revealed a uterine cavity length of 12 cm by sounding, and the specimen showed no malignant tissue. Therefore, the preoperative suspicion of ovarian teratocarcinoma could be excluded. The patient underwent an exploratory laparotomy, multiple pockets of pelvic abscess, enlargement of the uterus and induration of omentum surrounding the appendix were found.(ABSTRACT TRUNCATED AT 250 WORDS)

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Scrub typhus is still prevalent on Penghu Islands. We herein report a case in a pregnant woman who had been to Yi-Lan County in Taiwan. The patient responded well to Minocycline (Minocin) therapy without complication. Her newborn baby was found not complicated with the disease. The relative literature is reviewed.

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In a case of pilomatrixoma, an initial fine needle aspiration (FNA) biopsy of a skin lesion yielded only a monomorphic population of mitotically active basaloid cells with squamous differentiation, without anucleated ghost cells, chronic inflammatory cells or foreign-body giant cells. These findings suggested a metastatic squamous-cell carcinoma or a malignant tumor of adnexal skin. The correct diagnosis was made by repeat FNA, which yielded the basaloid cells and ghost cells characteristics of pilomatrixoma; the FNA diagnosis was confirmed by subsequent excisional biopsy. This case demonstrates that pilomatrixoma should be considered in the differential diagnosis of skin aspirates that contain a dominant population of basaloid cells. The differentiation of pilomatrixoma from malignant lesions of the head and neck region is discussed.

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A disseminated infection with Penicillium marneffei, a rare human pathogen that may infect both healthy and immunocompromised patients, was diagnosed by fine needle aspiration cytology in a patient infected with the human immunodeficiency virus. The presence of yeast-form organisms with an eccentric or central dot and occasional septate and elongated forms highly suggested the diagnosis, which was confirmed on culture. Establishment of the diagnosis is important because this infection is potentially curable.

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Despite treatment, emesis remains a major problem with cisplatin chemotherapy. Three potent antiemetics, metoclopramide, dexamethasone and lorazepam, were combined in prophylaxis of 18 patients receiving cisplatin based combination chemotherapy. In 75 courses of chemotherapy, 57% experienced complete protection from vomiting and 89% of treatment courses had two or fewer vomiting episodes. Complete protection and mild episodes from nausea was 47% and 53% respectively. Toxicities were mild and infrequent. It was concluded that combination of high-dose metoclopramide, dexamethasone and lorazepam was highly efficacious in preventing nausea and vomiting in moderate or high-dose cisplatin chemotherapy with little side effects.

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Chlamydia trachomatis infection, presumably sexually transmitted, has been implicated in the spread of tubal infertility and ectopic pregnancy. In searching evidence of Chlamydia trachomatis infection as a possible cause of tubal ectopic pregnancy, we enrolled 40 consecutive pathologically proven tubal ectopic women and 37 normal early intrauterine pregnant women from our OPD and ward from Jan. 1989 to July 1989. All cases underwent a structured interview giving particular attention to past reproductive history, contraception history and past history of STD. The levels of serum antibody IgG to Chlamydia trachomatis in all cases were determined. Seven ectopic women with wearing IUD in situ (group A) and 33 ectopic women with no identical factor (group B) were compared with 37 normal early intrauterine pregnant women (control group). The result showed group B more often had IgG antibody to Chlamydia trachomatis than control group (P = 0.001). Group A had higher antibody to Chlamydia trachomatis than control group but the difference was not statistically significant (P greater than 0.05). We concluded that the above findings add to the evidence that Chlamydia trachomatis infection is a major cause of tubal ectopic pregnancy.

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Ulex europaeus 1 lectin (UEA1) has previously been shown to bind to hepatic sinusoidal endothelium in cirrhotic liver. This study was undertaken to determine the relationship between UEA1 sinusoidal binding and hepatic venous pressure gradient in patients with portal hypertension. Twenty one liver specimens (including 18 from patients with alcoholic cirrhosis) biopsied within an interval of 1 month from the hepatic venous pressure study were examined for UEA1 binding. The consistent staining pattern of normal liver controls formed the basis for the criteria of positivity and grading system. Seventeen cases (81%) were positive, but the staining intensity or extent showed no strong correlation with the hepatic venous pressure gradient; however, three of the four negative cases were in the low pressure range which is rarely associated with variceal bleeding. We conclude that UEA1 is a useful marker for significant sinusoidal alterations in portal hypertension and a helpful adjunct in the histological diagnosis of cirrhosis.

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Seventeen prostatic-type polyps of the lower urinary tract are reported. All occurred in males, and the mean ages of the patients with ureteric orifice, bladder and urethral polyps were 20.5, 60.2 and 36.6 years, respectively. The commonest presentation for the bladder and ureteric orifice polyps was haematuria, whereas that for the urethral polyps was either dysuria or haematuria. The polyps consisted of acini and papillae lined by prostatic-type epithelium, as confirmed by immunostaining for prostatic-specific antigen. Most had interspersed islands or complete covering of transitional epithelium on the surface. We believe that the histogenesis of prostatic-type polyps may differ in the different sites. For the ureteric orifice polyp, the early age of presentation and the simple occurrence of prostatic acini beneath an intact urothelium suggest a developmental abnormality. For the bladder polyp, the late onset of disease and the commonly observed transition with cystitis cystica-glandularis suggest that it may be a metaplastic variant of cystitis cystica-glandularis. On the other hand, the urethral polyp probably represents a hyperplastic lesion, since the prostatic urethra is normally lined partly by prostatic-type epithelium.

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Three cases of an unusual diffuse sclerosing variant of papillary carcinoma of the thyroid occurring in young adults are reported. The tumour is characterized by diffuse involvement of one or both lobes of the thyroid, marked squamous metaplasia, numerous psammoma bodies, extensive interstitial fibrosis and heavy lymphocytic infiltration with formation of germinal centres. Lymphatic and vascular permeation was found in all three cases. An interesting finding was the presence of irregularly disposed thin bundles of smooth muscle within the fibrous stroma, presumably a result of splaying of the smooth muscle of vessel walls by the sclerotic process. The papillary areas of the tumour stained for thyroglobulin and cytokeratin, while the squamous areas stained strongly for cytokeratin but not for thyroglobulin. The tumours were negative for calcitonin and carcinoembryonic antigen, but showed weak staining for S-100 protein. Numerous S-100 positive Langerhans/interdigitating reticulum cells were scattered within the tumour islands and the lymphoid infiltrate, suggesting an immunological reaction mediated by these antigen-presenting cells.

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