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Biomedical subjects

R J Guy

Publications and source records attributed to R J Guy.

At least 19 recordsLinked to original sources
PubMed2004

Mumps and rubella: a year of enhanced surveillance and laboratory testing.

In Victoria (Australia) surveillance for mumps and rubella has historically been passive, with most notified cases clinically diagnosed. In July 2001, the Victorian Department of Human Services implemented an enhanced surveillance system focusing on improved laboratory testing. We tested 85% of notifications and only 9% of all mumps and 27% of rubella notifications were laboratory confirmed. While most notified cases were children who had been clinically diagnosed, we found most laboratory-confirmed cases were in adults. The positive predictive value of the clinical case definition was low: mumps (10%); rubella (22%). These results highlight the value of laboratory confirmation of the diagnosis when mumps and rubella are rare, failure to do so is likely to overestimate disease incidence.

Adolescent↗
PubMed2003

Septic complications after treatment of haemorrhoids.

BACKGROUND: Recent reports of serious sepsis following stapled haemorrhoidectomy have raised concerns about the appropriate treatment of haemorrhoidal disease. METHODS: A Medline search was undertaken for reports of sepsis following the commonly practised conservative and surgical treatments of haemorrhoids. RESULTS: Published accounts of significant septic complications after injection sclerotherapy, rubber-band ligation, cryotherapy, open and closed haemorrhoidectomy, and stapled haemorrhoidectomy are discussed. This is supplemented by the authors' own experiences of stapled haemorrhoidectomy. CONCLUSION: Septic complications following both conservative and surgical treatment of haemorrhoids are rare but may be catastrophic. Immunological compromise poses an additional risk for many treatment modalities. The technique of stapled haemorrhoidectomy should be learned diligently to avoid septic complications.

Adult↗
PubMed2003

Stapled anoplasty for haemorrhoids: a comparison of ambulatory vs. in-patient procedures.

OBJECTIVE: Haemorrhoids are commonly seen in colorectal practice. Stapled anoplasty is a novel approach to the treatment of this condition and is usually performed as an in-patient procedure. The aim of this study was to investigate the suitability of this technique for ambulatory surgery. PATIENTS AND METHODS: Fifty consecutive patients undergoing stapled anoplasty under general anaesthesia as day cases (DC) (mean age 41 years; 27 females) by a single consultant surgeon over a 12-month period were compared with 50 consecutive patients undergoing the same procedure as in-patients (mean age 44 years; 25 females) (IP) during the same period. RESULTS: Eight DC patients (16%) were admitted overnight from the day surgery unit for urinary retention (3), pain (2), bleeding (2) and anaesthetic reasons (1). Three other DC patients were re-admitted after a mean period of 4 days with bleeding (2), one of which required surgical haemostasis, and a septic complication (1). Mean hospital stay for IP cases was 2.6 (range 1-9) days. Two IP cases were re-admitted after 4 and 11 days for bleeding and wound infection, respectively. At review 2-4 weeks after discharge, satisfaction in both groups was high. Minor staple-line strictures were seen in 1 DC and 2 IP cases but all were easily dilated digitally. Mean costs incurred were significantly less for day surgery patients. CONCLUSIONS: Stapled anoplasty is suitable for use in day-case surgery as it is a quick and relatively painless procedure. The advantages, particularly financial, support the technique for use in an ambulatory setting, preferably in the morning, and provided detailed patient advice is given.

Adult↗
PubMed2002

Adults in a high-risk area are unaware of the importance of colorectal cancer: a telephone and mail survey.

PURPOSE: There are few studies assessing public awareness of colorectal cancer even in developed countries. This questionnaire and telephone-based survey aimed to determine the degree of awareness of colorectal cancer among adults in a high-risk population with a high level of literacy. METHODS: Two thousand randomly-selected adults living in Singapore were invited to answer a questionnaire by telephone (T, n = 1,000) or by returned mail (M, n = 1,000). The questionnaire consisted of 20 questions relating to epidemiology, presentation, screening, and management of colorectal cancer. RESULTS: There was a compliance rate of 85.2 percent for telephoned subjects, but only 21.5 percent of mailed subjects returned a completed questionnaire. Only 2.7 percent of T and 1.4 percent of M named colorectal cancer as a fatal disease. Only 49.6 percent of T and 60.9 percent of M were aware that the colon and rectum are part of the intestines. A minority (T 11.7 percent, M 35.8 percent) were aware of screening as an important means against developing colorectal cancer. A large proportion (T 46.5 percent, M 34.9 percent) were unable to name even one symptom of colorectal cancer. There was low awareness of causative factors for colorectal cancer (T 39.6 percent, M 28.4 percent). A proportion (T 24.8 percent, M 28.4 percent) believed that colorectal cancer affects people less than 40 years of age. Newspapers and popular magazines exert far more influence (T 58.2 percent, M 52.1 percent) than television, the internet. or doctors in educating the public about colorectal cancer. Respondents with higher education level (junior college and above), as well as those with a positive family history, tend to score better in the knowledge section. CONCLUSIONS: Knowledge of colorectal cancer among the surveyed population was poor despite a relatively high incidence of the disease in Singapore. Public education regarding colorectal cancer is best done via newspapers and magazines.

Adolescent↗
PubMed2001

Massive bleeding from a Dieulafoy-like lesion of the rectum in a burns patient.

Gastrointestinal haemorrhage is a rare but well-recognised complication of extensive burns, the site of haemorrhage usually being in the upper gastrointestinal tract. The case of an 18-year old female patient who developed sudden massive rectal bleeding 1 month after suffering 45% body surface area burns is presented. The source of the haemorrhage was a Dieulafoy-type lesion at the anorectal junction associated with mucosal ulceration, a cause of bleeding not previously described in a patient with major burns. Angiographic embolisation failed to control the haemorrhage and surgical arrest was required, following which the patient made a complete recovery with no recurrence of bleeding. Haemorrhage from the lower gastrointestinal tract is rarely associated with major burns but may be significant when it occurs. The aetiology is unclear but sepsis, mucosal ischaemia and ulceration may be implicated.

Adolescent↗
PubMed2001

Reflex nature of the cardiorespiratory response to primary thoracic blast injury in the anaesthetised rat.

Blast injuries represent a problem for civilian and military populations. Primary thoracic blast injury causes a triad of bradycardia, hypotension and apnoea. The objective of this study was to investigate the reflex nature of this response and its modulation by vagotomy or administration of atropine. The study was conducted on terminally anaesthetised (alphadolone/alphaxalone, 18-24 mg x kg x h(-1), I.V.) male Wistar rats randomly allocated to the groups indicated below. Blast injuries were produced with compressed air while sham blast involved the sound of a blast only. Primary blast injury to the thorax resulted in a bradycardia (measured as an increase in the interval between beats, or heart period (HP) to 489 +/- 37 ms from 133 +/- 3 ms with a latency of onset of 4.3 +/- 0.3 s, mean +/- S.E.M.), hypotension (fall in mean arterial blood pressure (MBP) from 128.1 +/- 3.7 mmHg to 34.8 +/- 4.1 mmHg, latency of onset 2.0 +/- 0.1 s) and apnoea lasting 28.3 +/- 2.3 s. Sham blast had no effect. The bradycardia and apnoea following thoracic blast were abolished by cervical vagotomy while the hypotension was attenuated. Atropine (0.3 mg x kg(-1), I.V.) caused a significant reduction in the bradycardia (HP increasing from 124 +/- 3 ms to 142 +/- 4 ms) but did not modulate either the hypotension or apnoea. It is concluded that a reflex involving the vagus nerve mediates the bradycardia, apnoea and a component of the hypotension associated with thoracic blast. The pattern of this response is similar to effects that follow stimulation of the pulmonary afferent C-fibres.

Anesthesia↗
PubMed2001

Restorative proctocolectomy in UK servicemen.

OBJECTIVE: To investigate the outcome of restorative proctocolectomy (RPC) in UK Servicemen and to determine the compatibility of this procedure with Service life. PATIENTS: All Servicemen undergoing restorative proctocolectomy for ulcerative colitis (UC) or familial adenomatous polyposis (FAP) up to December 31st 2000 were identified from Service records. Patients were reviewed by direct or telephone interview. Pouch function, military duties, medical category or reasons for discharge from the Service were recorded. RESULTS: Fifteen Servicemen (6 Royal Navy, 6 Army, 3 RAF), mean age 30 years, underwent RPC for UC (14) or FAP (1) with a median follow-up of 74 months. Eight remain in their Service, five of whom carry out full duties and three restricted duties. Of the seven who have left the Services only one was medically unfit to continue due to poor pouch function whilst six left voluntarily to pursue active civilian careers. Fourteen patients have acceptable pouch function; one pouch has been excised for intractable pouchitis. CONCLUSIONS: Restorative proctocolectomy is compatible with Service life and most individuals are capable of fulfilling active unrestricted military duties.

Adenomatous Polyposis Coli↗
PubMed2000

Successful resection of an ileoanal pouch mesenteric desmoid without pouch sacrifice: report of a case.

PURPOSE: Intra-abdominal desmoid tumors are associated with familial adenomatous polyposis and may compromise ileoanal pouch function after restorative proctocolectomy, particularly if the pouch mesentery is involved. This usually necessitates pouch excision. The aim of this report was to describe the first known case of pouch salvage after surgery for a desmoid tumor arising from the pouch mesentery. METHODS: The management of a desmoid tumor involving an ileoanal pouch in a 21-year-old female is described and the literature reviewed. RESULTS: The tumor was successfully excised completely after failed medical therapy, and pouch function was fully preserved. CONCLUSIONS: This is a unique case highlighting the possibility of pouch salvage when affected by desmoid tumor.

Adenomatous Polyposis Coli↗
PubMed2000

Anatomy of Denonvilliers' fascia and pelvic nerves, impotence, and implications for the colorectal surgeon.

BACKGROUND: The development and anatomy of Denonvilliers' fascia have been controversial for many years and confusion exists about its operative appearance. Better appreciation of this poorly understood anatomy, and its significance for impotence after rectal dissection, may lead to further functional improvements in pelvic surgery. METHOD: A literature review of the embryology and anatomy of Denonvilliers' fascia and impotence after pelvic rectal surgery was undertaken. RESULTS: Denonvilliers' fascia has no macroscopically discernible layers. The so-called posterior layer refers to the fascia propria of the rectum. The incidence of erectile and ejaculatory dysfunction after rectal excision is high in older patients, and when performed for rectal cancer. There is no consensus about the relationship of Denonvilliers' fascia to the plane of anterior dissection for rectal cancer. CONCLUSION: Colorectal surgeons should focus on the important anatomy between the rectum and the prostate to improve functional outcomes after rectal excision. A classification of the available anterior dissection planes is proposed. Surgeons should be encouraged to document the plane used as well as outcome in terms of sexual function.

Autonomic Nervous System↗
PubMed2000

Primary blast injury: pathophysiology and implications for treatment. Part III: Injury to the central nervous system and the limbs.

There are some structures in which changes consistent with primary blast may be found despite secondary and tertiary blast being the most frequent sources of injury. The Central Nervous System for example, especially the brain, is well protected yet there are historical and experimental accounts of damage which cannot be attributed to secondary or tertiary blast or even air embolism resulting from pulmonary disruption. Similarly, analysis and experimental simulation of specific skeletal injuries has shown that primary blast alone can fracture bones and that it is likely to be responsible for limb avulsions in victims exposed to stress waves of sufficiently high intensity.

Blast Injuries↗