PubMed Health⌕ Search

Biomedical subjects

Pauline Mills

Publications and source records attributed to Pauline Mills.

2 recordsLinked to original sources

Coronary sinus lead extraction.

Complications are reported more frequently with the implantation of coronary sinus (CS) than other types of leads, and attempts to extract CS leads may also be associated with increased risks. The authors have performed nonthoracotomy lead extraction (LE) since 1981 and maintained a detailed database. By November 2001, 796 leads had been removed from 401 patients. We undertook review of our CS-LE experience to evaluate prevalence, safety, and efficacy. Of 14 patients referred for CS-LE, 7 were treated in the last year. In six the lead had been placed in the CS intentionally, and in eight inadvertently. One recent patient treated with biventricular pacing was septic and died before LE was undertaken. In nine men and four women (mean age 66 years) had one each CS lead and a total of 34 LEs (2.6/patient). Four CS leads had been in place for < 6 months (mean 1.5 month), whereas nine had been in place for between 6 months and 27 years. Several LE methods were used, from simple traction to the use of intraluminal locking stylets and powered sheaths. Complete removal of all leads was achieved in all patients. CS-LE required a mean of 13 minutes, including 1.8 minutes of fluoroscopy. There were no serious complications during the procedures, and the mean hospital stay was 4 days.

Aged↗

Pulsed short-wave diathermy effects on human fibroblast proliferation.

OBJECTIVES: To investigate the influence of pulsed short-wave diathermy (PSWD) on fibroblast and chondrocyte cell proliferation rates and to establish the influences of different dosages applied. DESIGN: Four single-blind trials. SETTING: Laboratory, in vitro study. SPECIMENS: Human adult dermal fibroblast and chondrocyte cells were plated at known concentrations and incubated for 5 days. INTERVENTION: Exposure to PSWD, twice daily, on days 2, 3, and 4. MAIN OUTCOME MEASURE: After crystal violet staining (day 5), optical density (cell number) was determined spectrophotometrically. RESULTS: PSWD, given at mean power of 48W for 10 minutes, increased fibroblast proliferation compared with control groups (P<.001). There was a relationship between cell proliferation and the amount of energy given (P<0.001). The optimal mean power for proliferation was estimated to be 13.8W. While keeping mean power constant at 6W, altering pulse duration and pulse repetition rate dosage parameters did not have a significant effect on proliferation (P=.519). Chondrocyte proliferation also increased with PSWD exposure of 6W at 10 minutes duration (P=.015). In addition, treatment time was significantly associated with chondrocyte proliferation (P<.001). CONCLUSION: PSWD is associated with increased rates of fibroblast and chondrocyte proliferation in vitro, which is dose dependent. These results contribute to an understanding of the physiologic mechanisms underlying the therapeutic effects of PSWD.

Adult↗