Biomedical subjects

R M Baer

Publications and source records attributed to R M Baer.

10 recordsLinked to original sources

PubMed2000

A randomized controlled trial of intracameral lidocaine during phacoemulsification under topical anesthesia.

OBJECTIVE: To test the hypothesis that adjunctive intracameral 1% lidocaine reduces intraoperative pain during phacoemulsification using topical anesthesia. DESIGN: Prospective, double-masked, randomized, controlled trial. PARTICIPANTS: A total of 200 patients undergoing routine phacoemulsification under topical 1% tetracaine were studied. INTERVENTION: Randomization to 0.5 ml intracameral, unpreserved, epinephrine-free 1% lidocaine or placebo was conducted. MAIN OUTCOME MEASURE: Intraoperative pain was quantified by the patients using a 0-10 visual analog pain scale. RESULTS: Intraoperative pain scores (+/- standard deviation) for the lidocaine and control groups were 1.29 +/-1.24 and 1.44 +/- 1.33, respectively (P > 0.35). CONCLUSIONS: In a rigorously double-masked, prospective, randomized, controlled trial there was no significant reduction in intraoperative pain when intracameral 1% lidocaine was used during phacoemulsification under topical anesthesia.

Adult↗

PubMed1997

Conventional routine clinical review may not be necessary after uncomplicated phacoemulsification.

AIM: To determine the clinical intervention rate during routine review after uncomplicated phacoemulsification. METHODS: A review of case notes in 651 consecutive cases of uncomplicated phacoemulsification from 1994 (< or = 5.5 mm self sealing wound) was performed. The intervention rate at scheduled routine review visits and at unscheduled visits to the eye casualty service in the first 120 postoperative days was recorded. Interventions were defined as departures from predetermined postoperative care protocols. RESULTS: Clinical interventions were reported in 2.8% (95% confidence interval 1.5 to 4.1%) of (n = 1652) routine follow up visits. Many of these interventions were avoidable or trivial; 90% of patients had no postoperative intervention at any visit. 7.3% of patients made unscheduled visits to the emergency service. The intervention rate in this group was 50% (35.9 to 64.1%). CONCLUSIONS: The intervention rate in routine clinical review after uncomplicated modern cataract surgery is low. Alternatives to conventional postoperative review, including shared care with non-ophthalmologists and improved perioperative patient education with an open channel for self referral, should be evaluated.

Adult↗

PubMed1995

Cataract extraction following vitrectomy and silicone oil tamponade.

Surgery for cataract resulting from pars plana vitrectomy combined with fluid/silicone oil exchange is often rewarding in terms of visual acuity improvement. Careful choice of surgical method and suitable modifications of standard technique reduce the incidence of serious complications. Per-operative posterior capsulotomy is a safe method of maintaining a clear visual axis after ECCE.

Adult↗

PubMed1990

Retinal vessel responses to passive tilting.

Alterations in retinal vessel calibre on changing posture may indicate an autoregulatory response to changing perfusion pressure. The effect of passive tilting on retinal response in healthy individuals was investigated. Subjects were supported on a specially constructed tilting table. The control measurements were taken with the body in a 30 degrees head up position. Red-free fundus photographs were taken before, during and after a three minute period of 30 degrees head down tilting. Ten subjects were assessed (mean age 29 years: range 18-38). A total of 92 arteriolar and 86 venular sites were measured. On tilting to the head down position arterioles showed an early and significant decrease in calibre: mean -3.1% (p less than 0.001). Venules showed an increase of 3.7% (p less than 0.001). The response was not sustained throughout the period of tilting despite a maintained increase in ocular perfusion pressure, which was estimated in six of the subjects.

Adolescent↗

PubMed1982

Hemoglobin A1 correlates with the ratio of low-to high-density-lipoprotein cholesterol in normal weight type II diabetics.

Because cardiovascular risk correlates with serum low density lipoprotein (LDL) cholesterol and is inverse with high density lipoprotein (HDL) cholesterol, the LDL-HDL cholesterol ratio has been advocated as a sensitive index of relative cardiovascular risk. In 50 normal weight insulin-treated Type II diabetic subjects, mean LDL-HDL ratios were significantly higher than for controls. In diabetic women, the LDL-HDL cholesterol ratio correlated with hemoglobin A1 better than any of the lipids or lipoprotein cholesterol fractions. When 8 poorly controlled diabetics were treated with insulin, the LDL-HDL ratio changed more significantly than did its component fractions, and the fall in LDL-HDL ratio paralleled the fall in hemoglobin A1.

Adult↗

PubMed1980