PubMed Health⌕ Search

Biomedical subjects

I P Davis

Publications and source records attributed to I P Davis.

3 recordsLinked to original sources

Impact of endoscopic therapy on outcome of operation for bleeding peptic ulcers.

Since elective surgery for bleeding peptic ulcer disease has declined, the surgical opinion is that patients who undergo emergency operation have more advanced disease and possibly a poorer outcome. We examined current mortality for surgical correction of upper gastrointestinal (UGI) bleeding from peptic ulcer disease. Between July 1, 1986, and December 31, 1990, 1,213 patients had esophagogastroduodenoscopy for UGI bleeding (659 with peptic ulcer disease, 219 with gastroesophageal varices, 152 with esophagitis, 83 with other causes, and 100 with no source found). Of 110 patients with peptic ulcer disease treated by endoscopic methods, bleeding was controlled in 90, and 20 required operation for failed endoscopic control. Another 22 patients had primary operation for exigent bleeding with diagnostic endoscopy only. The overall results in our series compared favorably with two pre-therapeutic endoscopy index series (Nottingham, 1982; University of Pittsburgh, 1982). Our operation rate was 6%, with a mortality rate of 7%, compared with operation rates of 15% to 27%, with mortality rates of 21% to 22% in the historical control series. In conclusion, we found that: (1) endoscopic control of UGI bleeding from peptic ulcer disease has decreased the incidence of operation compared with historical series; (2) overall operative mortality is decreasing; and (3) the major postoperative complication is rebleeding.

Adult↗

Helium insufflation for laparoscopic operation.

Laparoscopic surgical procedures are becoming simultaneously more commonplace and complex. However, carbon dioxide (CO2) pneumoperitoneum required for these procedures causes a respiratory acidosis. We undertook this study to determine if an alternate insufflating gas, such as helium, prevents this sequelae. Twenty patients undergoing elective laparoscopic cholecystectomy were randomized to receive either CO2 or helium insufflation. Intraoperative parameters, including arterial CO2 (PaCO2), end-tidal CO2, pH, bicarbonate (HCO3-), cardiac output and blood pressure were obtained before, during and at the conclusion of pneumoperitoneum. Effects of the two gases on these variables were compared. The average CO2 rose significantly from 35.7 +/- 1.0 to 50.4 +/- 3.2 (p < 0.0001), while pH decreased from 7.434 +/- 0.014 to 7.286 +/- 0.018 (p < 0.0001) in those who received CO2. No change in PaCO2 was observed in those who received He, although a small decrease in pH from 7.428 +/- 0.011 to 7.392 +/- 0.012 (p < 0.05) was observed. HCO3- decreased slightly in both groups. Increases in blood pressure and pulse rate were independent of the gas received. The cardiac output did not change. Helium insufflation for laparoscopic cholecystectomy does not produce the respiratory acidosis caused by CO2 and, therefore, merits further investigation for use, particularly in patients with underlying respiratory disease.

Adult↗