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Biomedical subjects

P Malek

Publications and source records attributed to P Malek.

20 records · Page 2Linked to original sources

The mental health patient profile: does it change primary care physicians' practice patterns?

BACKGROUND: We conducted a prospective trial randomizing 75 physicians to either a control or intervention arm to evaluate the impact of providing patient-reported information on anxiety and other mental health symptoms and disorders to primary care physicians. METHODS: Five hundred seventy-three patients of the study physicians who met entry criteria were randomized to either usual care or usual care supplemented with feedback of patient-reported mental health information to physicians. This mental health information was derived from initial patient-reported questionnaires completed in waiting rooms of physicians contracted to a mixed-model health maintenance organization in Colorado. Main outcome measures included impact of intervention on rates of (1) chart notation of anxiety, depression, or other mental health diagnoses or symptoms; (2) referral to mental health specialists; (3) prescription of psychotropic medications; (4) hospitalization; and (5) office visits during a 5-month observation period. RESULTS: Physicians receiving feedback on previously unrecognized and untreated anxiety patients were more likely to make chart notations (adjusted odds ratio [AOR] = 2.51, 95 percent confidence interval [CI] = 1.62-3.87), to make referrals to mental health specialists (AOR = 3.86, 95 percent CI = 1.63-9.16), and to see patients for more frequent outpatient visits (AOR = 1.73, 95 percent CI = 1.11-2.70). Use of psychotropic medications and rate of hospitalizations did not differ significantly. CONCLUSIONS: Providing patient-reported mental health information to primary care physicians resulted in increased recognition and referral rates for previously unrecognized and untreated anxiety patients, plus an increase in primary care visits, without concomitant increases in the use of psychotropic medications or rate of hospitalizations.

Adult↗

A comparison of methods for the measurement of hemodialysis access recirculation and access blood flow rate.

The ability to accurately measure access recirculation (AR) is of importance because its presence indicates access dysfunction and may explain why a prescribed Kt/V (urea) has not been delivered. The ability to measure access flow (Qa) allows access monitoring and the detection of impending access dysfunction. AR can be measured by indicator dilution or conductivity tracer techniques. Qa calculation is simple if AR can be detected. The previous techniques are used while the patient's blood lines are reversed to induce AR, and the Krivitski equation gives: Qa = Qb [1-r/r] where Qb = dialyzer blood flow and r = proportion of AR induced. Three methods for AR and Qa measurements were directly compared: 1) ultrasound dilution (Transonics Hemodialysis Monitor, Transonics Systems Incorporated) (TRANS); 2) hematocrit dilution (Crit-Line Monitor, In-Line Diagnostics) (CRIT); and 3) differential conductivity (Hemodynamic Monitor, GAMBRO Healthcare Incorporated) (HDM). Patients were cannulated in a standard fashion and dialysis commenced with lines in normal configuration. A HDM test was performed and, if AR = zero, the lines were reversed to induce AR. HDM, TRANS, and CRIT tests for AR were next done in rapid succession for direct comparison. Each test was repeated three times in succession, the device in random order, to assess test repeatability. Qb was taken from the 1) dialysis machine pump, and 2) directly from TRANS and Qa calculated, using 1) and 2) AR results. In comparison to TRANS, AR results were virtually identical for HDM (TRANS AR = 1.04 HDM-AR + 0.02, r = 0.98, p = 0.0000), and good for CRIT (CRIT-AR = 0.84 TRANS-AR - 0.2, r = 0.81, p = 0.001), but CRIT underestimated the values. Repeatability was assessed by normalizing (%) the SD of repeated measurements; values were 7.5% (HDM), 9.1 % (TRANS), and 17.4% (CRIT). Qa value comparisons were similar (minimal r = 0.83) regardless of Qb source, but CRIT overestimated the value; repeatability data showed 10.6% (HDM), 13.0% (TRANS), and 25.2% (CRIT) (n ranged from 15-64). In summary, TRANS and HDM appear equal as far as accuracy and repeatability of measurements; CRIT results correlated well, but tended to underestimate AR and overestimate Qa, and was less reproducible.

Arteriovenous Shunt, Surgical↗