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Biomedical subjects

I S Grimm

Publications and source records attributed to I S Grimm.

At least 19 recordsLinked to original sources
PubMed2001

Inflammatory bowel disease in the elderly.

Approximately 15% of all patients with IBD first develop symptoms after age 65. As the number of elderly in the population continues to grow, clinicians should expect to see a greater number of elderly IBD patients. In general, the presenting features of IBD are similar to those encountered in younger patients, but the broad differential diagnosis of colitis in the elderly can make definitive diagnosis more challenging. Although most therapies for IBD have not been studied specifically in the elderly, as a general rule, medical and surgical treatment options are the same regardless of age. Osteoporosis, a condition generally associated with aging, should be managed aggressively in patients with IBD because many older persons already have a substantial baseline risk for accelerated bone loss.

Aged↗
PubMed1999

Hyoscyamine as a pharmacological adjunct in colonoscopy: a randomized, double blinded, placebo-controlled trial.

OBJECTIVE: Investigators have assessed the utility of antispasmodic agents in colonoscopy, with conflicting results. The aim of this study is to determine the effects of premedication with hyoscyamine, an anticholinergic antispasmodic, on outcomes in colonoscopy. METHODS: A total of 165 patients undergoing elective colonoscopy were randomized in a double blinded fashion to one of three arms: intravenous hyoscyamine (0.25 mg), oral hyoscyamine (0.25 mg), or placebo, administered 20-40 min before colonoscopy. Primary outcome measures included insertion time to cecum, patient's assessment of pain, and physician assessment of spasm. Secondary outcome measures included amount of analgesic medications used, total procedure time, amount and type of pathology visualized, and physician assessment of patient's pain. RESULTS: Bivariate analysis showed no difference between the three groups in insertion time (13.8 min, 14.8 min, and 13.8 min for placebo, intravenous hyoscyamine, and oral hyocyamine, respectively), analgesic medication necessary, or any other primary or secondary outcome variable. Multivariate analysis controlling for potential confounders also failed to demonstrate any differences between the groups. Women had higher procedure duration and analgesic requirement, and reported more pain than did men. CONCLUSIONS: This randomized, double blinded, placebo-controlled trial did not demonstrate efficacy of either intravenous or oral hyoscyamine as a premedication for colonoscopy.

Administration, Oral↗
PubMed1998

Clinical characteristics of hereditary hemochromatosis patients who lack the C282Y mutation.

Approximately 85% of patients with typical hereditary hemochromatosis (HH) are homozygous for the C282Y mutation (C282Y/C282Y) in the recently identified candidate gene for HH. However, some HH patients are instead homozygous for the wild-type allele (wt/wt) at this locus. These wt/wt patients may represent a phenotypically similar, but genotypically different, heritable trait, or may be unrecognized cases of secondary iron overload. The purpose of this study is to provide an in-depth analysis of the wt/wt HH patients identified in the original description of the HH gene, and to compare them with 62 patients from the same analysis who were homozygous for the C282Y mutation. Eighteen of the 21 wt/wt HH patients from the original study were assessed for 14 historical and laboratory variables, including previously unrecognized causes of secondary iron overload, the heritability of iron overload and liver disease, and other clinical characteristics. Ten of these 18 wt/wt HH patients (55.6%) were found to have previously unrecognized causes for secondary iron overload compared with 3 of 62 (4.8%) of the C282Y/C282Y patients (P < .001). The remaining 8 wt/wt patients had no recognizable etiology of secondary iron overload. None of the 18 wt/wt patients had a family history of iron overload or liver disease, compared with 58% of the C282Y/C282Y patients (P < .001). When compared with C282Y homozygotes, the 8 wt/wt patients without secondary iron overload had a higher presenting hepatic iron index (HII) (9.5 vs. 4.7; P = .01). We conclude that, in this series of patients, over half of the wt/wt HH patients possessed previously unrecognized causes of secondary iron overload, and therefore, may have been misdiagnoses. If these cases are excluded, the number of false-negative tests is decreased, and the sensitivity of the mutational analysis is increased. However, there is a subgroup of wt/wt patients who have typical hemochromatosis without an identifiable cause of secondary iron overload. These patients may have more severe iron loading than C282Y homozygotes.

Cohort Studies↗
PubMed1998

Type I choledochal cyst in association with familial adenomatous polyposis.

Choledochal cysts and familial adenomatous polyposis are infrequent disorders that are often manifest in childhood or in early adult life. The rarity and early presentation of these diseases suggests a genetic basis, which has been established for familial polyposis but not for choledochal cysts. We report a case of a 26-yr-old woman with both disorders and offer an alternative genetics-based etiology for the formation of choledochal cysts.

Adenomatous Polyposis Coli↗
PubMed1996

Comparison of the Caldwell needle/cannula with Angiocath needle in large volume paracentesis.

OBJECTIVE: To evaluate the efficacy and safety of a newly designed paracentesis needle, the Caldwell needle/ cannula (CNC), and to compare it with the Angiocath needle for large volume paracentesis (LVP). METHODS: Forty patients (ages, 18-75 yr) with symptomatic non-malignant ascites and serum creatinines < 1.6 were randomized to undergo LVP with either the 15-gauge CNC or the 14-gauge Angiocath needle. LVP was considered complete when the ascitic fluid was believed to have been completely removed, a goal of 6 L was attained, or fluid return was poor despite clinically obvious ascites. Outcome parameters measured included time necessary for the LVP, amount of ascitic fluid removed, number of peritoneal punctures, and the reason for termination of LVP. Ascitic fluid from eight patients was used to measure in vitro flow rates for both needles at -80, -120, and -200 mm Hg. RESULTS: Twenty patients underwent LVP with the CNC and 20 with the Angiocath. Patients in whom the CNC was used had significantly faster paracenteses (17.0 +/- 0.8 vs. 34.1 +/- 1.5 min) and required fewer second peritoneal punctures (1 vs. 6, p = 0.046). Fewer LVPs in the CNC group were terminated secondary to poor fluid return (8 vs. 1, p = 0.022). The volume of fluid removed was greater with the CNC than with the Angiocath, but this difference did not reach statistical significance (5205 +/- 209 vs. 4683 +/- 269 ml, p = 0.079). There were no complications in either group. In vitro flow rates were 2.2-3.8 times faster through the CNC than through the Angiocath at all pressures tested (p < 0.05 for all groups). CONCLUSIONS: The CNC provides a faster, more complete paracentesis requiring fewer peritoneal punctures than a single-bore needle.

Adult↗
PubMed1994

Inflammatory bowel disease in older patients.

The onset of UC and CD may occur later in life. Although making the diagnosis of IBD in the elderly can be challenging, the clinical course, natural history, and response to treatment are similar for older and younger patients. In fact, both UC and CD tend to be less extensive in older patients, a feature that may contribute to the overall favorable prognosis for elderly patients with IBD. Overall mortality rates for both UC and CD appear to be similar to that of the general population except for those few patients that present with severe initial disease. Typical features of IBD in the elderly are summarized in Table 3. The differential diagnosis of IBD in the elderly includes infectious causes of enterocolitis, ischemic colitis, and diverticular disease as well as several other mimics of IBD. Awareness of the possibility of late-onset disease and the unique manifestations of disease in the elderly contributes to accurate diagnosis and timely treatment.

Aged↗
PubMed1992

Steatohepatitis and fatal hepatic failure after biliopancreatic diversion.

Steatohepatitis and hepatic failure are well known complications of jejunoileal bypass, an operation that has been abandoned as a treatment for severe obesity because of its potential for adverse metabolic consequences. Biliopancreatic diversion is a novel operation designed to avoid the harmful effects of jejunoileal bypass. Although it has not gained wide acceptance, this procedure is being advocated by some surgeons as a safe and effective treatment for severe obesity. Published reports indicate that liver histology generally remains stable or improves after biliopancreatic diversion. We present a patient who developed steatohepatitis and subsequently died in hepatic failure after this operation. Severe liver disease should be added to the list of complications that may follow biliopancreatic diversion.

Adult↗
PubMed1991

Successful shock-wave lithotripsy of bile duct stones using ultrasound guidance.

Eighteen patients with 41 gallstones in the common bile duct, common hepatic, cystic, and intrahepatic ducts underwent shock-wave lithotripsy using the electrohydraulic Sonolith 3000 lithotripter. Lithotripsy was performed using ultrasound guidance alone under intravenous analgesia/sedation. All patients previously had failed stone extraction via retrograde endoscopy, T-tube, or cholecystostomy. Lithotripsy was performed according to an FDA-approved protocol allowing a maximum of two 2500 shock-wave treatments at a 48 hr interval. Following the final lithotripsy or cholangiographic evidence of stone fragmentation, residual fragments were removed via endoscopic or percutaneous route within 24-72 hr. Ultrasound localization of gallstones was aided by continuous infusion of the common bile duct with saline solution. In 15 of the 18 patients, complete fragmentation of the stones was accomplished, two had minimal fragmentation, and one with an encysted stone had no fracturing. No serious complications were encountered. Overall nonsurgical stone-free success rate was 17 of 18 patients, indicating biliary duct stones can be successfully treated using an ultrasound-guided lithotripter and intravenous sedation alone.

Aged↗