Biomedical subjects

N W Hasaniya

Publications and source records attributed to N W Hasaniya.

7 recordsLinked to original sources

PubMed1998

Relationship of mortality to increasing oxygen delivery in patients > or = 50 years of age: a prospective, randomized trial.

OBJECTIVE: To investigate the relationship of mortality to early resuscitation using two levels of oxygen delivery (DO2) in critically ill surgical patients > or =50 yrs of age who were stratified into groups: age < or =75 yrs (age 50 to 75 yrs group); and age >75 yrs (age >75 yrs group). DESIGN: A prospective, randomized trial, continued from a previous project. SETTING: Surgical intensive care unit, university affiliated. PATIENTS: Consecutive patients, >50 yrs of age, unable to generate a DO2 of > or =600 mL/min/m2 with fluid resuscitation alone, with a diagnosis of systemic inflammatory response syndrome, sepsis, severe sepsis, septic shock, and/or acute respiratory distress syndrome. INTERVENTIONS: During the first 24 hrs of resuscitation, patients were randomized to receive fluids, blood transfusions, and vasoactive agents in order to achieve DO2 treatment goals of > or =600 mL/ min/m2 in the protocol group and 450 to 550 mL/min/m2 in the control group. MEASUREMENTS AND MAIN RESULTS: One hundred five patients completed the study. In patients aged 50 to 75 yrs, the mortality rate was 21% (9/43) in the protocol group and 52% (12/23) in the control group (p=.01, 95% confidence interval of -58% to -4%). In patients >75 yrs of age, the mortality rate was 57% (12/21) in the protocol group and 61% (11/18) in the control group. Oxygen extraction ratios (O2ER) and oxygen consumption values were significantly (p=.02) lower in the age >75 yrs group compared with the age 50 to 75 yrs group. CONCLUSIONS: Patients 50 to 75 yrs of age receiving a DO2 of > or =600 mL/min/m2 demonstrated a statistically significant (p=.01) improved survival rate over patients in the control group. Patients >75 yrs of age demonstrated no benefit from attempts to increase DO2 to >600 mL/min/m2, and they may have been overtreated as reflected by the lower O2ER values in this age group. Treating to an O2ER that reflects a balance between oxygen consumption and DO2 may be an alternative goal that allows individual titration.

APACHE↗

PubMed1997

High-volume vs standard fluid therapy in a septic pig model. Impact on pulmonary function.

OBJECTIVE: To compare pulmonary function and peripheral organ blood flow in septic pigs receiving high-volume fluid resuscitation or standard-volume fluid resuscitation with similar goals in oxygen delivery. DESIGN: A prospective study comparing 2 groups of septic pigs. SETTING: A university animal research laboratory. SUBJECTS: Eleven septic pigs. INTERVENTIONS: Basal oxygen delivery was increased from 450 to 550 mL/min to at least 600 mL/min by the sixth hour and maintained for 24 hours. From a baseline pulmonary artery occlusion pressure (PAOP) measurement of approximately 6 mm Hg, the high-volume group (n = 5) was treated until a PAOP measurement of 12 mm Hg was reached and the standard-volume group (n = 6) was treated until a PAOP measurement of 8 mm Hg was reached. Blood transfusions and inotropic agents were added as necessary to reach the oxygen delivery goal. RESULTS: The high-volume group had a significantly greater positive fluid balance, greater weight gain, and a higher PAOP but similar intrapulmonary shunt and extravascular lung water as compared with the standard-volume group. CONCLUSION: Resuscitation with large volumes of fluid in early sepsis with a physiological goal of a higher PAOP to augment oxygen delivery did not cause increased pulmonary edema and oxygenation deficit compared with maintenance of lower cardiac filling pressures.

Animals↗

PubMed1996

Direct laparoscopic entry using a sharp and dull trocar technique.

For direct laparoscopic entry using a sharp and dull trocar technique, the sharp trocar is inserted with a twisting motion under constant pressure, then replaced with a dull trocar when a slight loss of resistance is felt. A slow, gradual entry into the peritoneal cavity is accomplished by twisting the dull trocar under constant pressure. Previous major abdominal or pelvic surgery is not a contraindication to this procedure, and use of these trocars, which can be resterilized for every use, may reduce surgical costs by decreasing the need for disposable trocars. This technique has been used in 1655 patients without complication or failure.

Humans↗

PubMed1996

Efficacy of subcutaneous silver-impregnated cuffs in preventing central venous catheter infections.

STUDY OBJECTIVES: To determine the efficacy of an attachable subcutaneous silver-impregnated cuff in preventing local central venous catheter (CVC)-related infection and catheter-related sepsis in critically ill surgical patients. DESIGN: A prospective analysis of the use of an attachable subcutaneous silver-impregnated cuff compared with a control group in two consecutive time periods. SETTING: Two surgical ICUs at the Queen's Medical Center at the University of Hawaii Surgical Residency Program, Honolulu. PATIENTS: All surgical ICU patients requiring insertion of central catheters. INTERVENTIONS: None. MEASUREMENT AND MAIN RESULT: Two hundred thirty-five CVCs in 154 patients were prospectively evaluated. Silver-impregnated cuffs were used in the first 100 catheters, but none were used in the remaining 135 catheters. The incidence of catheter-related infection in both groups was 15% and 20%, respectively, not statistically significant. Catheter-related sepsis was 3% in both groups. CONCLUSIONS: The use of an attachable subcutaneous silver-impregnated cuff failed to decrease the incidence of CVC-related infection and sepsis.

APACHE↗

PubMed1996

Eosinophilia as a marker of adrenal insufficiency in the surgical intensive care unit.

BACKGROUND: Because hemodynamic instability may have several causes in critically ill patients, adrenal insufficiency may not be readily diagnosed. Eosinophilia has been described in patients with chronic adrenal insufficiency but not in critically ill patients. The goal of this study was to determine whether eosinophilia could serve as a marker of adrenal insufficiency in critically ill patients. STUDY DESIGN: During a 1-year period, all surgical patients admitted to the surgical intensive care unit with an eosinophil count greater than 3 percent were prospectively studied. To diagnose adrenal insufficiency, the synthetic corticotropin (cosyntropin) stimulation test was used. RESULTS: Eosinophilia was diagnosed in 31 patients, 7 (23 percent) of whom had adrenal insufficiency. The mean time interval to diagnosis was 13.7 days (range, 4 to 39 days). In 82 percent of the patients treated with hydrocortisone, a response was evidenced within 24 hours of treatment by a decrease in the required inotropic support by more than 50 percent, an increase in the mean arterial blood pressure of more than 25 percent, or both. CONCLUSIONS: New-onset eosinophilia may be a useful marker for adrenal insufficiency. Prompt testing and diagnosis may avoid the occurrence of a treatable, life-threatening condition.

Adrenal Cortex Function Tests↗

PubMed1995

Hemolytic anemia secondary to a porcine mitral prosthetic valve leaflet dissection.

This is a case of a dissecting cusp of a mitral porcine xenograft causing severe hemolytic anemia in the absence of valvular dysfunction and regurgitation. Six months after valve replacement, the patient had no evidence of hemolytic anemia. A cuspal dissection between the atrial and ventricular membranes was found on histologic evaluation.

Aged↗

PubMed1995

Atrial myxomas: experiences with 35 patients in Hawaii.

BACKGROUND: Thirty-five patients with an intracardiac myxoma underwent excision of the tumor in Hawaii between 1974 and 1993. PATIENTS AND METHODS: There were 28 female and 7 male patients in the group. Their ages ranged from 11 to 79 years (mean 48) with the majority (71%) between 30 and 60 years old. The patients' medical records were reviewed and special attention was paid to clinical presentation, methods of diagnosis, operative findings, and postoperative course. RESULTS: No ethnic predisposition was found. Forty-six percent of the presenting symptoms were cardiac (congestive heart failure 26%, palpitations 14%, and syncope 6%) while arterial embolization accounted for 11%. Diagnosis was made by angiography, echocardiography, or gated cardiac blood pool imaging. All were reliable, but two-dimensional (2-D) echocardiography was used most often, with no false-positive or false-negative results. There were 32 left atrial, 2 right atrial, and 1 biatrial myxomas. Limited septectomy was performed in most cases, but 9 patients (26%) required Dacron patch repair of the atrial septum. There was 1 death from a cerebrovascular accident the day after the removal of a left-sided atrial myxoma. Other patients had few minor postoperative complications. One patient presented with a recurrence 8 years after resection at another institution; no further recurrences were found. CONCLUSIONS: We conclude that due to the non-specific presentation of atrial myxoma, a high index of suspicion is needed. The diagnostic method of choice is 2-D echocardiography. Limited septectomy is a safe procedure, but close follow-up for at least 10 years may be needed to rule out recurrence.

Adolescent↗