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Layton F Rikkers

Publications and source records attributed to Layton F Rikkers.

At least 19 recordsLinked to original sources
PubMed2007

Effective surgical residents strongly influence medical students to pursue surgical careers.

BACKGROUND: There is a paucity of data about the influence of surgical residents on the career choices of medical students. We hypothesized that medical students exposed to effective surgical residents would be more likely to pursue careers in surgery. STUDY DESIGN: From 1998 to 2003, 108 surgical residents were evaluated by medical students rotating on the third-year clerkship. Residents were scored on a 4-point scale (1 = outstanding to 4 = poor). The career choices of all medical students were also tabulated. RESULTS: We examined 2,632 evaluations on 108 residents. Medical students who eventually pursued surgical residency training were exposed to surgical residents who were more effective clinical teachers, role models, and overall residents. In addition, medical students exposed to the highest-rated residents were more likely to pursue surgical residency training compared with students exposed to the least effective residents (12% versus 4.9%, p = 0.022). CONCLUSIONS: These data suggest that surgical residents who are effective educators and mentors influence medical students to pursue surgical careers. Efforts to provide more leadership and teaching workshops to surgical residents may not only create better future surgeon educators, but may also increase the number of students pursuing surgical training.

Career Choice↗
PubMed2006

Metastatic neuroendocrine hepatic tumors: resection improves survival.

BACKGROUND: The optimal treatment for hepatic metastases from neuroendocrine tumors remains controversial because of the often indolent nature of these tumors. We sought to determine the effect of 3 major treatment modalities including medical therapy, hepatic artery embolization, and surgical resection, ablation, or both in patients with liver-only neuroendocrine metastases, with the hypothesis that surgical treatment is associated with improvement in survival. DESIGN: Retrospective study. SETTING: Tertiary care center. PATIENTS: Patients with metastatic liver-only neuroendocrine tumors were identified from hospital records. INTERVENTIONS: Patients were subdivided into those receiving medical therapy, hepatic artery embolization, or surgical management. MAIN OUTCOME MEASURES: Effect of treatment on survival and palliation of symptoms was analyzed. RESULTS: From January 1996 through May 2004, 48 patients with liver-only neuroendocrine metastases were identified (median follow-up, 20 months), including 36 carcinoid and 12 islet cell tumors. Seventeen patients were treated conservatively, which consisted of octreotide (n = 7), observation (n = 6), or systemic chemotherapy (n = 4). Hepatic artery embolization was performed in 18 patients. Thirteen patients underwent surgical therapy, including anatomical liver resection (n = 6), ablation (n = 4), or combined resection and ablation (n = 3). No difference was noted in the percentage of liver involved with tumor between the 3 groups. An association of improved survival was noted in patients treated surgically, with a 3-year survival of 83% for patients treated by surgical resection, compared with 31% in patients treated with medical therapy or embolization (P = .01). No difference in palliation of symptoms was noted among the 3 treatment groups (P = .2). CONCLUSION: In patients with liver-only neuroendocrine metastases, surgical therapy using resection, ablation, or both is associated with improved survival.

Adenoma, Islet Cell↗
PubMed2006

Distal splenorenal shunt versus transjugular intrahepatic portal systematic shunt for variceal bleeding: a randomized trial.

BACKGROUND & AIMS: Variceal bleeding refractory to medical treatment with beta-blockers and endoscopic therapy can be managed by variceal decompression with either surgical shunts or transjugular intrahepatic portal systemic shunts (TIPS). This prospective randomized trial tested the hypothesis that patients receiving distal splenorenal shunts (DSRS) would have significantly lower rebleeding and encephalopathy rates than TIPS in management of refractory variceal bleeding. METHODS: A prospective randomized controlled clinical trial at 5 centers was conducted. One hundred forty patients with Child-Pugh class A and B cirrhosis and refractory variceal bleeding were randomized to DSRS or TIPS. Protocol and event follow-up for 2-8 years (mean, 46 +/- 26 months) for primary end points of variceal bleeding and encephalopathy and secondary end points of death, ascites, thrombosis and stenosis, liver function, need for transplant, quality of life, and cost were evaluated. RESULTS: There was no significant difference in rebleeding (DSRS, 5.5%; TIPS, 10.5%; P = .29) or first encephalopathy event (DSRS, 50%; TIPS, 50%). Survival at 2 and 5 years (DSRS, 81% and 62%; TIPS, 88% and 61%, respectively) were not significantly different (P = .87). Thrombosis, stenosis, and reintervention rates (DSRS, 11%; TIPS, 82%) were significantly (P < .001) higher in the TIPS group. Ascites, need for transplant, quality of life, and costs were not significantly different. CONCLUSIONS: DSRS and TIPS are similarly efficacious in the control of refractory variceal bleeding in Child-Pugh class A and B patients. Reintervention is significantly greater for TIPS compared with DSRS. Because both procedures have equivalent outcomes, the choice is dependent on available expertise and ability to monitor the shunt and reintervene when needed.

Adult↗
PubMed2004

Why do students choose careers in surgery?

BACKGROUND: Recent changes in medical education have emphasized primary care careers. This could have a negative impact on the number of applicants to surgical residencies. We hypothesized that experiences during the third year surgical clerkship are influential for students' subsequent residency choice. MATERIALS AND METHODS: Third year medical students who completed their surgical clerkship in the 2001-02 academic year were surveyed pre- and post-surgical clerkship. Responses were analyzed and correlated to the 2003 match results. RESULTS: The response rate of students surveyed was 98% (82 surveys/83 match results). Pre-clerkship, 6/82 students (7%) expressed an interest in surgery or surgical subspecialty careers. Post-clerkship, 34/84 students (40%) expressed an increased interest a surgical career; 13/84 (15%) expressed a decreased interest, and 37% of students expressed no change in career interest. Of those students expressing an increased interest in surgery, the clerkship experiences most noted to be influential were (1) number of cases participated/scrubbed (95%), (2) resident interaction (85%), (3) faculty interaction (80%), and (4) number of cases observed (65%). The number of hours spent on rotation (call, rounds) was the leading experience associated with a decreased interest in a surgical career. 12/83 students surveyed (14%) ultimately matched into a surgical program (NRMP 2003 match results). CONCLUSIONS: These data suggest that operative exposure and interaction with residents and faculty have a positive influence in students' choice of a surgical career. Although only 6% of students expressed an interest in surgery pre-clerkship, a 2-fold increase in this number was noted in choice of residency (14%). Work hours were the primary negative indicator for surgery residency. As medical curriculum is restructured and surgical exposure decreased, these data underscore the importance of quality exposure to both procedures and role models during the 3rd year surgical clerkship.

Career Choice↗
PubMed2004

Clinical risk score correlates with yield of PET scan in patients with colorectal hepatic metastases.

Although positron emission tomography (PET) detects occult metastatic disease in approximately 20% of patients with isolated hepatic colorectal metastases, it is associated with false negative results in up to 16%. We hypothesized that patients with a poorer prognosis (as defined by clinical risk score [CRS]) would have a higher yield from PET. All patients with colorectal liver metastases who were imaged by means of PET between 1998 and 2002 were identified from a prospective PET database. All patients were assigned a CRS, with one point added for each of five preoperative factors (disease-free interval <1 year, tumor size >5 cm, tumor number >1, carcinoembryonic antigen >200, and node-positive primary lesion). A total of 85 PET scans were reviewed. In half the patients (53%), PET provided no additional information over conventional imaging. Occult extrahepatic disease was detected or questionable findings seen on conventional imaging were confirmed in 20% of PET scans, whereas PET readings were inaccurate in 27%. PET findings were correlated with CRS in a subset of 63 patients presenting with a first occurrence of hepatic colorectal metastases. Among patients with a CRS of 0, no patient had extrahepatic disease detected by PET and 57% had false positive readings, whereas among patients with a CRS of 1 or more, 14% were found to have additional disease that was detected only by PET, and there were no false positive readings (P<0.001, Fisher's exact test). Patients with isolated hepatic colorectal metastases and a CRS of 0 should undergo conventional imaging alone prior to surgical exploration.

Adult↗
PubMed2003

Splenic vein thrombosis and gastrointestinal bleeding in chronic pancreatitis.

The most common cause of isolated thrombosis of the splenic vein is chronic pancreatitis caused by perivenous inflammation. Although splenic vein thrombosis (SVT) has been reported in up to 45% of patients with chronic pancreatitis, most patients with SVT remain asymptomatic. In those patients with gastrointestinal bleeding secondary to esophageal or gastric varices, the diagnostic test of choice to assess for the presence of SVT is late-phase celiac angiography. Splenectomy effectively eliminates the collateral outflow and is the treatment of choice. Other underlying pathology, such as pseudocysts, can be treated at the same time.

Chronic Disease↗
PubMed2003

Medical student operative experience correlates with a match to a categorical surgical program.

BACKGROUND: Interest in general surgical residencies has decreased significantly. Because medical student clerkship experiences may affect specialty preferences, we attempted to determine if the degree of exposure to surgical procedures influenced career choices. METHODS: Operations observed by students who completed the third-year surgical clerkship between 1998 and 1999 were reviewed. These 146 medical students, who matched to residency training programs in March 2000, were then divided into three groups based upon residency fields. Surgical case exposures were then compared between the groups. RESULTS: The total number of operations observed was similar between the groups. However, students who matched into categorical general surgical programs participated in significantly more abdominal and general surgical procedures than those matching in surgical subspecialty or nonsurgical residencies (P < 0.01). CONCLUSIONS: There appears to be a correlation between surgical case exposure during the third-year clerkships and future residency fields. Thus, the degree of exposure to surgical procedures may influence medical student career choices.

Adult↗
PubMed2002

Cryoablation and liver resection for noncolorectal liver metastases.

BACKGROUND: Liver resection for noncolorectal liver metastases has merit for selected primary tumor types. The role of cryosurgical tumor ablation within this cohort of patients has not been evaluated. This is a single institutional review of treatment outcomes using cryosurgical ablation and conventional resection techniques for noncolorectal liver metastases. METHODS: The medical records of 42 patients undergoing 48 hepatic tumor ablative procedures from February 1991 through May 2001 at a single institution were retrospectively reviewed. Overall survival and local hepatic tumor recurrence-free survival were analyzed for different surgical procedures and primary tumor types. RESULTS: Overall survival rates at 1, 3, and 5 years are 82%, 55%, and 39%, respectively (median survival, 45 months). Local hepatic tumor recurrence-free survival rates for resection only (n = 25) and cryosurgery with or without resection (n = 23), at 3 years are 24% and 19%, respectively. The survival rates at 5 years are 40% and 37%, for resection only and cryosurgery with or without resection, respectively. CONCLUSION: Cryosurgical hepatic tumor ablation for metastatic noncolorectal primary tumors results in survival and local hepatic tumor recurrence rates similar to resection alone. The combination of cryosurgery and resection extends the cohort of patients with surgically treatable disease.

Adolescent↗