Prophylactic Oral Antibiotics on Sinonasal Outcomes Following Endoscopic Transsphenoidal Surgery for Pituitary Lesions (POET)

St. Joseph's Hospital and Medical Center, Phoenix

Status and phase: Enrolling; Phase 4

Conditions: Antibiotics; Pituitary Adenoma

Treatments: Drug: Oral Antibiotics cefdinir or trimethoprim/sulfamethoxazole; Drug: Placebo

Study type: Interventional

Funder types: Other

Identifiers

NCT03014687

PHX-16-0134-30-12

Details and patient eligibility

About

To find out whether oral antibiotics given after transsphenoidal endoscopic surgery for pituitary adenoma improves sinus and nasal symptoms, reduces the incidence of infection (sinusitis), and helps mucosal healing in the nasal passages.

Full description

Transsphenoidal surgery is the standard of care for most symptomatic pituitary adenomas. Since transsphenoidal surgery exploits the nasal passage to reach the sella turcica and pituitary gland, the technique causes disruption of sinonasal function and temporarily impacts sinonasal quality of life. Disrupted sinonasal function is a primary source of postoperative morbidity following transsphenoidal surgery. Common sinonasal complications include sinusitis, synechiae formation, nasal obstruction and crusting. The development of postoperative sinusitis is specifically associated with decreased sinonasal function after surgery. Because the nasal cavity is a contaminated surgical field, practitioners routinely prescribe a course of oral postoperative antibiotics for 7-14 days (in addition to standard prophylactic perioperative intravenous antibiotics) with the intention of improving nasal functional outcomes. To date, no studies have examined whether the administration of oral antibiotics following transsphenoidal surgery improves sinonasal healing. This question has been studied in a closely-related field, functional endoscopic sinus surgery (FESS). A meta-analysis of clinical trial data obtained in FESS indicated that current literature does not support the use of oral antibiotics to reduce infection, improve symptoms scores, or improve endoscopic findings. Furthermore, there is the potential for antibiotic-related adverse events including the emergence of bacterial resistance, Clostridium difficile infection, and allergic reactions to the medication. Despite the lack of supporting evidence in FESS, prophylactic antibiotic use for improving sinonasal healing is still common in pituitary surgery. The investigators propose to study whether prophylactic oral antibiotics following transsphenoidal surgery improve sinonasal quality of life, reduce sinusitis incidence, and promote mucosal healing following endoscopic transsphenoidal surgery.

Enrollment: 116 estimated patients

Sex: All

Ages: 18 to 84 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Adult patient undergoing endoscopic surgery for resection of pituitary tumors for nonfunctioning adenoma, acromegaly, or prolactinoma
• Adults >18 and <85 years of age
• English speaking and able to understand the ASK Nasal-12 and SNOT-22 scales
• Free of any physical, mental, or medical condition which, in the opinion of the investigator, makes study participation inadvisable

Exclusion criteria

• Anaphylaxis/intolerance to the study drugs
• Cirrhosis, hepatitis
• Any solid organ transplant or bone marrow transplant. And any patient felt to be immunocompromised by the investigators
• Renal failure on dialysis
• Any subject who is unwilling or unable to sign informed consent for the study
• Pregnancy
• Incarcerated patients
• Cushing's disease
• Rathke's Cleft cyst or pituitary cyst
• History of chronic sinusitis
• Anticipated use of nasal splints
• Anticipated use of nasal septal flap
• Active sinusitis
• Nasal polyps
• Previous sinus surgery
• Concurrent antibiotics for another indication (i.e., urinary tract infection)
• Immunodeficiency

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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116 participants in 2 patient groups, including a placebo group

Standard Nasal Care

Placebo Comparator group

Description:

One dose of preoperative intravenous (iv) antibiotic (e.g., cefazolin 1gm, or cefuroxime 1.5gm, or clindamycin 300mg will be administered within 60 minutes of start of surgery. Repeat intraoperative dosing of antibiotics is permitted if length of surgery exceeds recommended dosing interval. IV antibiotic dosing schedules: Cefazolin 1 gm iv Q6 hr -or- Cefuroxime 1.5gm iv Q8 hr -or- Clindamycin 300 mg iv Q12 hr. Postoperative antibiotics: Study participants will receive one dose only of postoperative intravenous antibiotic (e.g., cefazolin 1gm, or cefuroxime 1.5gm, or clindamycin 300mg \[cephalosporin allergic patients\]) according to the recommended dosing schedule described above. This dose of antibiotics is in addition to the preoperative dose. Placebo PO BID (twice daily) will commence on the morning of postoperative day 1 and continue for 7 days.

Treatment:

Drug: Placebo

Standard Nasal Care + Oral Antibiotics

Experimental group

Description:

One dose of preoperative iv antibiotic (cefazolin 1gm, or cefuroxime 1.5gm, or clindamycin 300mg) will be administered within 60 minutes of start of surgery. Repeat intraoperative dosing of antibiotics is permitted if length of surgery exceeds recommended dosing interval. IV antibiotic dosing schedules: Cefazolin 1 gm iv Q6 hr -or- Cefuroxime 1.5gm iv Q8 hr -or- Clindamycin 300 mg iv Q12 hr. Participants will receive 1 dose only of postoperative iv antibiotic (cefazolin 1gm, or cefuroxime 1.5gm, or clindamycin 300mg \[cephalosporin allergic patients\]) according to the recommended dosing schedule described above. This dose of antibiotics is in addition to the preoperative dose. Oral antibiotics will commence on the morning of postoperative day 1; this group will receive oral antibiotics (cefdinir \[Omnicef®\] 300 mg PO BID or trimethoprim/sulfamethoxazole \[Bactrim DS™\] PO BID for cephalosporin intolerant patients) for 7 days.

Treatment:

Drug: Oral Antibiotics cefdinir or trimethoprim/sulfamethoxazole