Correction to: Prediction of unfavorable outcomes in cryptococcal meningitis: results of the multicenter infectious Diseases International Research Initiative (ID-IRI) cryptococcal meningitis study

In the original version of this article, Mustafa Sunbul was not included in the list of authors for this article. The name has been added accordingly.

Dose-response evaluation of the antisecretory effect of continuous infusion intravenous lansoprazole regimens over 48 h

BACKGROUND

Attainment of intragastric pH < 6.0 may require high-dose continuously infused proton pump therapy.

AIM

To assess the pharmacokinetic and pharmacodynamic dose-responses of continuous infusion regimens of lansoprazole.

METHODS

Healthy adult subjects were assigned to lansoprazole 60-mg intravenous bolus, followed by 6-mg/h continuous infusion; a 90-mg intravenous bolus followed by 6-, 7.5-, or 9-mg/h continuous infusion; or placebo.

RESULTS

Mean intragastric pH values for lansoprazole regimens ranged from 4.8 to 5.2 (0-24 h), 5.5 to 6.0 (>24 to 48 h) and 5.2 to 5.6 (0-48 h). Within these three intervals, the percentages of time intragastric pH exceeded 4, 5 and 6 ranged from 65% to 96%, 54% to 88% and 30% to 61% respectively. Pharmacokinetic parameters were dose-independent with steady-state plasma concentrations achieved within 6-12 h postdose and maintained over 48 h. The mean systemic clearance of lansoprazole was lower in CYP2C19 heterozygous metabolizers than in homozygous extensive metabolizers (9.2 vs. 16.5 L/h), with substantial variability resulting in overlapping ranges of clearance values for both subpopulations. All lansoprazole regimens were well-tolerated.

CONCLUSIONS

Lansoprazole administered as a 60-mg intravenous bolus followed by 6-mg/h continuous infusion produced intragastric pH effects comparable with those of higher dosage regimens.

Lansoprazole regimens that sustain intragastric pH > 6.0: an evaluation of intermittent oral and continuous intravenous infusion dosages

BACKGROUND

Orally and intravenously administered proton pump inhibitors have been shown to reduce rebleeding rates, surgery and transfusion requirement.

AIM

To compare lansoprazole intravenous and orally disintegrating tablet (Prevacid SoluTab) regimens with a pantoprazole intravenously administered regimen in sustaining intragastric pH >6.0.

METHODS

Two similarly designed three-way, randomized crossover studies each enrolled 36 Helicobacter pylori-negative healthy volunteers. Study 1 regimens included intravenously administered bolus followed by 24-h continuous infusion (lansoprazole 90 mg, 6 mg/h; lansoprazole 120 mg, 6 mg/h; pantoprazole 80 mg, 8 mg/h). Study 2 regimens included intravenous bolus followed by lansoprazole orally disintegrating tablet or intravenous continuous infusion for 24 h (lansoprazole 90 mg, lansoprazole orally disintegrating tablet 60 mg every 6 h; lansoprazole 120 mg, 9 mg/h; pantoprazole 80 mg, 8 mg/h). Percentage of time pH >6.0 was assessed with 24-h intragastric pH monitoring.

RESULTS

All regimens produced comparable gastric acid suppression. In both studies, regimens superior to pantoprazole included lansoprazole 90 mg, 6-mg/h; lansoprazole 90 mg, lansoprazole orally disintegrating tablet 60 mg q.d.s. and lansoprazole 120 mg, 9 mg/h (P < or = 0.013). The lansoprazole 120-mg, 6-mg/h regimen (P = 0.082) was not superior to pantoprazole in percentage of time intragastric pH >6.0. Mild reaction at the intravenous injection site was the most frequently reported adverse event.

CONCLUSIONS

The intravenous bolus and continuously infused lansoprazole or intravenous bolus and intermittent lansoprazole orally disintegrating tablet regimens are as effective as intravenous pantoprazole in sustaining intragastric pH >6.0.

Pharyngeal repair after laryngopharyngectomy: 4-year experience

The most common forms of surgical intervention carried out at the National Cancer Institute of Cairo for patients initially seen with hypopharyngeal carcinoma are (1) laryngopharyngectomy and pharyngeal repair using the pectoralis major myocutaneous flap (PMMF) and (2) extrapleural total pharyngolaryngoesophagectomy with gastric transposition (GT) and pharyngogastrostomy. The advantages and disadvantages with both techniques will be discussed on the basis of results of 69 patients with different tumor distributions over a 4-year period.

Postoperative radiotherapy of carcinoma in bilharzial bladder using a three-fractions per day regimen

Patients with T3 bladder cancer who survived surgery and proved to have P3a, P3b or P4a tumors were randomized to either no further treatment (61 patients) or postoperative total pelvic irradiation (55 patients). A three-fraction per day regime was adopted with a dose per fraction of 125 cGy and an interval of 3 h between fractions. The total dose amounted to 3750 cGy divided into 30 fractions over 12 days. Patients of the postoperative radiotherapy group were re-randomized to radiotherapy alone or radiotherapy plus misonidazole (MISO) in a daily dose of 1 g/m2 given orally 2 h before the first daily fraction. The 2-year disease-free survival rate in the cystectomy alone group was 33 +/- 6% compared to 65 +/- 6% in the postoperative radiotherapy group. The therapeutic benefit applied to the two cell types, all histological grades and stages and to patients with or without nodal metastases. The benefit of postoperative irradiation was also verified by the Cox's multivariant analysis which adjusts for the relative representation of the important prognostic factors particularly pathological stage and nodal involvement. MISO did not seem to add to the therapeutic gain. No late complications were encountered in the wall of the rectum, small bowel or uretero-intestinal anastomotic sites. This is suggested to be due to the small dose per fraction used. However, early small bowel reactions were dose-limiting.

Primary closure of the perineum and vacuum drainage after abdominoperineal excision

From retrospective study of the case records of 62 consecutive patients from whom 58 underwent abdominoperineal rectal excision for malignant or inflammatory bowel disease, it was found that management with primary closed perineum and closed pelvic peritoneum with closed vacuum drainage results in 84% primary perineal healing and short hospitalization. Perineal wounds were healed in 93% of patients within one month. Adequate exclusion of three sepsis promoting factors, e.g. dead space, devitalized tissue and micro-organisms should preclude perineal sepsis. The need for precise positioning of a large bore vacuum drain, Ch. 27, through a preoperatively determined stab-wound on the medial side of the thigh is stressed. To guarantee optimal drainage a three-stage procedure is required in a one-team management. The procedure is well tolerated as a palliation; patients with pre-existing massive perineal sepsis should be excluded.

The risk of central venous catheter-related sepsis in patients with surgical infections

A prospective study on the incidence of central venous catheter-related sepsis (CRS) in patients with or without concomitant bacterial infections was performed. In 194 patients, 315 central venous catheters were placed, mainly for parenteral nutrition and CVP measurement. Catheter sepsis in patients with surgical sepsis was 4.0% compared with 3.6% in the non-infected group. CRS occurred exclusively in patients with an open distant infection. Subdivision of the group of patients with infection showed that those with 'open' infection had significantly more CRS than those without open wounds. The results strongly suggest an almost exclusive exogenous route for catheter contamination. It is concluded that risk of catheter sepsis is not enhanced by the presence of concomitant infections located elsewhere. The low incidence and relative benign course of catheter-related sepsis in seriously ill patients with a surgical infection tends to widen the indication for central venous catheterisation rather than to restrict it.

Pre-operative whole-gut irrigation with mannitol

Whole-gut irrigation preceded by oral mannitol administration as a method of preoperative bowel preparation was studied in 58 patients. Our results did not confirm the advantages described in the literature. Irrigation time, irrigation fluid volume, patient acceptability and the quality of bowel preparation were not improved, compared to our earlier studies with saline alone. Fluid retention was considerably diminished after mannitol preparation. A significant increase in postoperative septic complications was observed. Disadvantages and possible hazards of mannitol administration are discussed. Mannitol cannot be recommended as a safe and useful adjunct in whole-gut irrigation.